耐旱甘薯种质资源的筛选与鉴定

doi:10.3864/j.issn.0578-1752.2025.02.002

中国农业科学 ›› 2025, Vol. 58 ›› Issue (2): 214-237.doi: 10.3864/j.issn.0578-1752.2025.02.002

• 作物遗传育种·种质资源·分子遗传学 • 上一篇下一篇

耐旱甘薯种质资源的筛选与鉴定

陈永先(), 陈瑞江(), 都艺芝, 术钧捷, 陈晚霞, 赵梓含, 王季春, 杜康(), 张凯()

西南大学农学与生物科技学院/薯类生物学与遗传育种重庆市重点实验室/南方山地农业教育部工程中心/重庆市作物种质北碚薯类资源库，重庆 400715

收稿日期:2024-06-29 接受日期:2024-09-18 出版日期:2025-01-21 发布日期:2025-01-21
通信作者:
杜康，E-mail：2018201026@njau.edu.cn。
张凯，Tel：023-68251264；E-mail：zhangkai2010s@163.com
联系方式: 陈永先，E-mail：ChenYX6009@163.com，陈瑞江，E-mail：18387516015@163.com。陈永先和陈瑞江为同等贡献作者
基金资助:
重庆市技术创新与应用发展专项重点项目(cstc2021jscx-gksbX0022); 重庆市作物种质北碚薯类资源库专项资金(ZWZZ2020005); 重庆市薯类产业技术体系创新团队专项资金

Screening and Identification of Drought-Tolerant Sweet Potato Germplasm Resources

CHEN YongXian(), CHEN RuiJiang(), DU YiZhi, ZHU JunJie, CHEN WanXia, ZHAO ZiHan, WANG JiChun, DU Kang(), ZHANG Kai()

College of Agronomy and Biotechnology, Southwest University/Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops/Engineering Research Center of South Upland Agriculture, Ministry of Education/Chongqing Beibei Germplasm Bank of Tuber and Root Crops, Chongqing 400715

Received:2024-06-29 Accepted:2024-09-18 Published:2025-01-21 Online:2025-01-21

摘要/Abstract

摘要：

【目的】寻求可精确指征甘薯耐旱性的关键指标和方法，筛选并鉴定耐旱甘薯种质资源，为耐旱甘薯种质资源的快速、准确鉴定提供有效方法，为优质耐旱甘薯品种选育提供材料基础和理论依据。【方法】以54份甘薯种质资源为材料进行干旱胁迫试验。设置干旱胁迫和对照2个处理，结合干旱池栽试验和大田试验，探究干旱胁迫对不同甘薯种质资源的生长发育、生理生化、抗氧化代谢、光合特性及产量等方面的影响，分析不同甘薯种质资源对干旱的响应特点，筛选甘薯耐旱性评价的有效指标；综合主成分分析、相关性分析、耐旱系数直接评价法和隶属函数计算综合耐旱性度量值（D值）法进行耐旱性评价，筛选鉴定耐旱甘薯种质资源。【结果】干旱池栽试验结果表明，干旱处理对不同甘薯种质资源的主茎长、地上部鲜重、地下部干重、块根鲜重的影响均达到极显著水平（P<0.01）；通过D值聚类分析筛选出耐旱种质资源8份。大田试验中，与对照相比，不同供试种质资源主茎长、茎粗、分枝数、叶面积指数、叶片相对含水量、叶绿素总量、气孔导度、净光合速率、蒸腾速率、胞间二氧化碳浓度、脯氨酸（Pro）、丙二醛（MAD）、过氧化物酶（POD）、超氧化物歧化酶（SOD）、抗坏血酸过氧化物酶（APX）、过氧化氢酶（CAT）指标在干旱胁迫下呈现极显著差异（P<0.01）。通过建立回归模型，初步确定了叶面积指数、根尖数、叶片POD、叶片APX、块根Pro、块根SOD、块根CAT、产量8个指标可作为甘薯耐旱性的鉴定指标。根据产量耐旱系数法分级，XN18111-1、20XN18-1、XN1834-11、XN17104-46为耐旱种质资源；根据综合耐旱性评价，XN18111-1、20XN18-1、XN1862-61的D值>0.6，耐旱性强。【结论】通过干旱池栽试验综合耐旱性评价、大田试验综合耐旱性评价和产量评价，最终确定XN18111-1、20XN18-1为耐旱种质资源，可作为耐旱品种育种材料或研究甘薯耐旱机制的理想资源材料。

关键词: 甘薯, 种质资源, 耐旱性, 指标, 评价鉴定

Abstract:

【Objective】Seeking key indicators and methods for accurately characterize drought tolerance in sweet potato, and screening and identifying drought-tolerant sweet potato germplasm resources, to provide effective methods for the rapid and accurate identification of drought-tolerant sweet potato germplasm resources, and to provide material and theoretical basis for selection and breeding of high quality and drought-tolerant sweet potato varieties. 【Method】Fifty-four sweet potato germplasm resources were used as materials for drought stress experiments. By using two treatments including drought stress and control, and combining with drought pool cultivation experiment and field test, the effects of drought stress on the growth and development, physiological and biochemical characteristics, antioxidant metabolism, photosynthetic characteristics and yield of different sweet potato germplasm resources were investigated, the response characteristics of different sweet potato germplasm resources to drought were analyzed, and the effective indicators for drought tolerance evaluation in sweet potato were selected. The drought tolerance evaluation was preformed using principal component analysis, correlation analysis, direct evaluation of drought resistance coefficient, and calculation of comprehensive drought tolerance measurement value (D value) based on membership function, and the drought-tolerant sweet potato germplasm resources were screened and identified.【Result】The results obtained from the drought pool cultivation experiment showed the influences of drought treatment on the main stem length, aboveground fresh weight, underground dry weight and fresh weight of storage root were extremely significant (P<0.01), and eight drought-tolerant germplasm resources were screened based on cluster analysis of D values. In the field test, the main stem length, stem diameter, number of branches, leaf area index, leaf relative water content, total chlorophyll content, stomatal conductance, net photosynthetic rate, transpiration rate, intercellular carbon dioxide concentration, proline (Pro), malondialdehyde (MAD), peroxidase (POD), superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT) showed highly significant differences (P<0.01) under drought stress when compared with control. Through the establishment of regression models, it could be initially determined that eight indicators including the leaf area index, root tip, leaf POD, leaf APX, storage root Pro, storage root SOD, storage root CAT, and yield could be used as indicators for drought tolerance identification in sweet potato. XN18111-1, 20XN18-1, XN1834-11 and XN17104-46 were classified as drought-tolerant germplasm resources according to grading of drought resistance coefficient based on yield. The D values of XN18111-1, 20XN18-1 and XN1862-61 were over 0.6 and showed high drought tolerance based on comprehensive drought tolerance evaluation. 【Conclusion】Based on results of comprehensive drought tolerance evaluation in drought pool cultivation experiment, as well as the comprehensive drought tolerance evaluation and yield evaluation in field test, XN18111-1 and 20XN18-1 were finally identified as drought-tolerant germplasm resources, which can be used as drought-tolerant breeding materials or ideal resource materials for study on drought-tolerance mechanism in sweet potato.

Key words: sweet potato, germplasm resources, drought tolerance, indicator, evaluation and identification

陈永先, 陈瑞江, 都艺芝, 术钧捷, 陈晚霞, 赵梓含, 王季春, 杜康, 张凯. 耐旱甘薯种质资源的筛选与鉴定[J]. 中国农业科学, 2025, 58(2): 214-237.

CHEN YongXian, CHEN RuiJiang, DU YiZhi, ZHU JunJie, CHEN WanXia, ZHAO ZiHan, WANG JiChun, DU Kang, ZHANG Kai. Screening and Identification of Drought-Tolerant Sweet Potato Germplasm Resources[J]. Scientia Agricultura Sinica, 2025, 58(2): 214-237.

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https://www.chinaagrisci.com/CN/Y2025/V58/I2/214

图/表 16

表1

图1

表2

图2

表3

干旱池栽试验供试甘薯材料各单项指标及其差异分析"

编号 No.	主茎长 Main stem length (cm)		地上部鲜重 Aboveground fresh weigh (g)		地下部鲜重 Underground fresh weight (g)		地上部干重 Aboveground dry weight (g)		地下部干重 Underground dry weight (g)		块根鲜重 Fresh weight of storage root (g)
编号 No.	CK	DS	CK	DS	CK	DS	CK	DS	CK	DS	CK	DS
1	78.67±1.15	66.35±1.55	138.72±5.09	60.54±13.96	10.97±2.38	8.01±1.47	12.84±0.16	8.29±0.18	3.25±0.02	1.37±0.18	875.04±14.38	216.67±11.57
2	61.33±13.05	29.69±4.53	60.59±15.47	18.03±6.15	9.55±0.83	5.54±0.84	4.90±0.04	3.42±0.08	2.26±0.14	1.31±0.10	191.67±5.09	83.33±11.93
3	106.33±3.51	115.35±4.75	232.05±2.16	222.08±11.66	13.16±2.26	19.94±4.62	21.14±0.05	20.74±0.28	8.46±0.05	3.15±0.06	1716.67±15.47	366.67±10.02
4	79.01±5.57	66.35±10.14	210.41±12.00	125.51±14.95	15.49±3.21	18.57±2.54	20.55±0.23	13.74±0.12	6.33±0.01	3.84±0.07	566.67±4.23	316.67±12.36
5	100.67±6.03	69.69±6.05	185.13±3.10	120.85±17.87	6.75±1.22	7.52±2.46	20.93±0.05	7.39±0.16	1.32±0.14	1.10±0.13	416.67±8.68	191.67±15.01
6	83.33±11.72	87.35±9.04	164.78±4.19	129.13±14.51	12.46±1.88	14.71±4.09	18.31±0.13	15.40±0.18	4.46±0.19	4.28±0.26	691.67±12.55	408.33±17.07
7	72.67±5.69	83.10±1.69	80.35±9.49	22.50±8.03	5.54±3.31	2.91±1.10	10.19±0.20	3.65±0.25	1.29±0.12	0.30±0.08	1600.01±10.10	100.02±2.68
8	65.33±3.21	72.02±1.75	207.36±3.99	177.72±15.92	10.73±2.35	9.01±3.29	21.22±0.28	18.94±0.04	4.48±0.07	1.58±0.02	533.33±4.12	358.33±11.66
9	75.33±6.66	95.35±6.45	138.36±12.10	195.88±17.71	9.11±3.21	16.92±1.70	14.70±0.16	25.02±0.03	3.82±0.21	3.69±0.15	500.01±11.53	400.00±14.95
10	64.33±3.79	68.02±12.31	148.49±11.17	94.35±9.71	21.47±3.75	14.28±4.81	16.46±0.24	18.89±0.14	7.17±0.14	4.43±0.12	466.67±12.90	456.67±15.64
11	78.67±4.62	33.35±10.09	50.95±2.59	9.59±6.48	5.31±0.41	4.90±1.41	7.33±0.30	3.18±0.02	1.44±0.09	1.16±0.05	50.02±14.06	8.33±17.87
12	52.67±14.57	53.35±5.53	110.40±9.94	74.19±17.50	16.32±3.11	25.06±4.72	12.43±0.02	11.45±0.15	3.66±0.14	6.88±0.11	366.67±4.19	333.33±14.50
13	73.33±3.06	50.02±8.56	132.12±14.61	62.86±17.15	7.43±2.79	6.50±2.39	16.53±0.27	12.23±0.25	1.78±0.13	1.45±0.18	141.67±9.49	91.67±8.03
14	99.02±6.56	76.35±5.71	130.69±15.10	116.14±18.71	10.37±1.84	7.58±3.43	16.25±0.29	13.43±0.04	2.72±0.01	1.69±0.14	408.33±3.99	300.00±15.90
15	62.33±2.08	43.35±4.06	69.90±16.80	43.48±16.31	6.14±2.63	9.52±4.31	8.25±0.33	4.32±0.28	2.69±0.10	3.10±0.07	166.70±12.10	100.05±17.70
16	49.33±6.66	49.35±9.89	76.51±12.36	59.56±10.30	13.39±2.52	10.08±4.18	11.27±0.28	8.83±0.11	2.80±0.13	1.8±0.02	166.70±11.17	98.05±15.70
17	74.69±5.53	73.33±10.26	92.89±8.87	64.45±15.65	8.60±4.85	4.67±0.17	20.33±0.19	11.21±0.19	1.89±0.03	1.18±0.01	233.33±2.59	91.67±15.25
18	49.67±6.35	53.35±7.04	55.93±14.58	43.55±6.73	9.75±3.55	4.85±0.98	9.15±0.03	8.91±0.08	2.26±0.04	0.85±0.01	250.01±9.94	166.67±4.78
19	47.67±8.08	45.19±13.27	50.92±12.63	39.88±8.58	8.56±3.27	7.43±1.88	8.33±0.26	6.61±0.04	1.88±0.03	1.36±0.09	550.03±14.61	366.67±3.57
20	45.33±14.19	47.02±10.17	30.50±9.78	17.77±10.90	5.28±0.61	4.54±1.79	5.23±0.12	3.91±0.01	1.61±0.25	0.46±0.02	66.67±15.1	50.00±16.52
21	56.67±7.51	70.02±7.02	45.77±7.41	43.20±14.84	9.47±2.57	7.31±6.18	9.39±0.01	7.61±0.21	2.19±0.01	1.69±0.16	66.67±16.80	25.00±16.98
22	36.33±4.04	34.69±11.70	80.32±7.89	56.36±17.62	10.94±1.25	9.69±8.49	12.43±0.18	11.38±0.07	2.39±0.13	1.76±0.13	366.67±12.36	41.67±13.81
23	56.67±5.69	47.69±5.88	63.62±5.31	23.90±3.65	8.46±1.96	6.15±0.42	10.17±0.09	4.58±0.11	1.95±0.06	1.39±0.25	158.33±15.65	25.00±1.97
24	59.03±12.95	61.02±7.83	59.19±8.12	32.93±15.63	4.09±1.65	2.75±0.54	9.22±0.34	7.38±0.07	0.82±0.04	0.32±0.13	291.67±8.91	91.67±11.01
25	109.67±15.63	85.35±13.52	140.05±2.84	90.43±4.52	6.26±1.15	4.53±0.16	17.51±0.31	13.15±0.09	1.29±0.08	0.88±0.11	883.33±14.58	183.33±16.94
26	47.00±7.94	52.02±6.26	38.24±2.02	32.46±3.13	4.37±0.38	6.54±0.17	4.66±0.01	5.87±0.14	1.77±0.13	1.60±0.14	175.01±12.63	66.67±18.87
27	45.33±11.59	58.02±1.02	82.06±15.78	89.61±15.70	11.74±1.76	6.98±3.03	12.33±0.17	18.74±0.06	3.27±0.21	1.61±0.02	925.02±13.52	541.67±17.64
28	58.33±15.89	56.35±10.28	41.31±17.21	32.84±15.25	7.56±3.41	4.60±2.96	7.35±0.33	8.49±0.25	3.20±0.13	1.51±0.08	116.67±7.74	91.67±19.26
29	53.67±16.44	50.69±9.04	53.09±5.27	13.91±4.78	6.21±3.09	2.08±0.52	7.53±0.13	1.60±0.05	1.70±0.07	0.38±0.02	200.04±9.75	8.33±11.72
30	69.00±11.53	76.69±4.06	64.13±12.83	59.90±3.57	5.62±3.16	4.90±1.36	10.20±0.11	10.47±0.11	1.71±0.22	0.72±0.07	475.02±4.69	83.33±14.14
31	85.33±14.74	65.69±11.87	71.35±5.67	51.45±16.52	4.43±0.39	4.41±1.96	10.37±0.23	9.30±0.20	1.65±0.07	1.04±0.05	158.33±9.78	33.33±13.80
32	71.33±4.04	61.02±13.10	57.60±16.11	32.89±13.81	10.68±2.80	5.65±3.72	10.26±0.06	6.70±0.28	2.45±0.08	1.19±0.14	333.33±7.41	150.00±16.14
33	55.67±14.01	30.02±7.83	32.31±10.47	1.61±1.97	3.63±0.44	2.33±1.02	5.16±0.20	0.72±0.09	0.81±0.02	1.26±0.15	216.67±7.89	108.33±15.96
34	65.33±5.51	57.69±3.08	114.89±1.09	103.28±11.01	8.10±0.57	6.64±1.42	13.38±0.05	14.06±0.02	1.69±0.28	1.03±0.02	508.33±5.31	475.04±6.46
35	109.33±14.15	81.35±5.15	102.81±9.16	123.03±18.87	6.82±0.42	2.49±1.47	12.37±0.14	18.67±0.11	1.38±0.03	0.21±0.10	358.33±11.72	341.67±19.19
36	41.33±8.14	28.02±8.91	105.99±4.57	58.64±17.64	13.55±2.96	9.86±3.74	14.44±0.02	13.36±0.19	3.95±0.06	2.25±0.07	483.33±14.14	341.67±17.46
37	70.67±3.21	71.35±5.79	47.94±3.64	49.18±19.26	4.73±0.13	2.04±1.71	5.89±0.24	7.89±0.02	0.88±0.02	0.15±0.06	108.33±18.20	83.33±16.79
38	80.50±9.50	72.35±8.98	98.81±8.30	73.87±11.72	7.21±0.56	7.21±3.67	12.10±0.08	13.26±0.10	1.83±0.09	2.16±0.12	375.03±19.42	216.67±18.69
39	78.67±10.02	58.02±6.26	78.83±12.55	46.23±14.14	20.11±2.94	3.17±1.91	11.18±0.21	8.47±0.04	4.01±0.08	0.82±0.04	291.67±7.76	233.33±1.79
40	99.00±14.93	84.35±4.64	149.90±4.12	158.95±16.14	9.82±2.29	10.66±3.47	19.54±0.29	24.12±0.03	5.44±0.22	3.39±0.13	758.33±12.02	658.33±10.86
41	60.00±14.11	35.02±6.58	75.06±11.53	39.94±15.96	7.18±1.07	4.52±2.35	9.22±0.13	7.74±0.02	1.72±0.04	0.90±0.05	166.67±11.90	141.67±14.70
42	65.33±14.05	40.69±3.81	52.12±12.90	23.02±6.46	6.36±1.04	4.03±0.62	10.35±0.16	5.56±0.07	1.16±0.16	0.76±0.11	75.00±12.60	16.67±11.67
43	47.33±14.98	52.69±9.09	33.73±14.06	53.94±19.19	8.16±2.39	8.02±2.49	5.25±0.14	10.77±0.18	2.14±0.10	1.83±0.22	258.33±15.78	175.00±9.89
44	43.67±11.93	30.69±10.09	54.05±2.50	36.71±17.46	5.25±1.42	4.36±2.34	8.45±0.18	6.61±0.21	1.37±0.04	1.02±0.01	175.00±17.21	58.33±6.78
45	78.33±9.29	55.02±11.02	93.20±11.57	60.74±16.79	9.99±3.07	7.28±2.50	14.11±0.04	14.06±0.02	2.23±0.15	3.43±0.13	608.33±5.27	491.67±14.14
46	84.33±9.02	58.02±1.02	91.82±11.93	80.60±18.69	6.28±0.63	8.21±3.04	14.43±0.28	13.40±0.27	1.63±0.13	3.47±0.03	373.33±12.83	241.67±18.20
47	79.67±11.37	44.35±6.45	78.54±10.00	17.89±1.79	9.94±3.62	4.66±3.44	10.09±0.04	3.53±0.04	2.19±0.06	0.93±0.08	158.33±5.67	16.67±19.42
48	84.67±7.02	73.35±5.15	88.11±12.36	68.51±10.86	7.16±2.28	6.99±2.67	12.65±0.36	12.53±0.07	2.44±0.07	1.77±0.23	391.67±12.22	283.33±11.56
49	62.67±7.02	45.69±2.10	79.66±9.34	61.18±14.70	7.74±2.51	13.98±4.17	12.27±0.09	9.77±0.14	2.39±0.06	3.13±0.08	283.33±16.11	233.33±16.49
50	68.00±6.56	53.35±9.04	78.33±6.03	49.01±11.67	7.23±2.02	5.83±1.81	12.48±0.19	10.09±0.11	1.68±0.12	1.23±0.06	308.33±10.47	233.33±10.17
51	54.00±13.53	46.69±7.04	70.47±7.01	64.36±18.20	11.68±3.41	5.16±3.24	14.30±0.16	11.6±0.09	2.68±0.03	1.74±0.18	433.33±1.09	258.33±7.02
52	73.33±6.66	65.69±4.06	88.05±11.86	62.93±19.42	10.78±0.57	7.56±3.44	14.09±0.07	11.79±0.06	2.86±0.14	2.45±0.15	175.33±12.31	125.01±11.70
53	63.67±7.09	45.02±8.91	70.16±0.72	50.17±11.56	10.27±4.83	8.86±2.18	12.11±0.15	8.78±0.15	2.81±0.24	2.15±0.16	233.33±9.16	166.67±6.45
54	52.33±8.39	63.35±2.91	79.11±4.38	95.05±16.49	4.83±1.48	9.10±3.10	11.17±0.19	19.13±0.07	1.44±0.29	1.76±0.30	933.33±4.57	425.03±6.89
平均值 Mean value	68.23	59.10	90.73	67.87	8.87	7.69	11.92	10.74	2.56	1.71	403.37	206.88
变异系数 Variation coefficient	0.26	0.31	0.52	0.69	0.43	0.60	0.36	0.53	0.61	0.70	0.83	0.76
相关系数 Correlation coefficient	0.01	0.03	0.13	0.30^*	0.28	0.34^*	0.15	0.45^**	0.24	0.39^**	0.15	0.58^**
标准误 Standard error	3.46		9.03		0.82		0.97		0.27		50.57
t	2.64**		2.53**		1.45		1.22		2.75**		3.89**
P	0.01		0.01		0.15		0.23		0.01		0.01

表3

表4

2供试甘薯种质各单项指标耐旱系数（DC）和综合耐旱系数（CDC）"

编号 No.	主茎长DC值 DC value of main stem length	地上部鲜重 DC值 DC value of aboveground fresh weight	地下部鲜重 DC值 DC value of underground fresh weight	地上部干重 DC值 DC value of aboveground dry weight	地下部干重 DC值 DC value of underground dry weight	块根鲜重 DC值 DC value of fresh weight of storage root	CDC值 CDC value	排序 Sort
1	0.84	0.44	0.73	0.65	0.42	0.25	0.55	46
2	0.48	0.30	0.58	0.70	0.58	0.43	0.51	50
3	1.08	0.96	1.52	0.98	0.37	0.21	0.85	15
4	0.84	0.60	1.20	0.67	0.61	0.56	0.75	30
5	0.69	0.65	1.11	0.35	0.83	0.46	0.68	38
6	1.05	0.78	1.18	0.84	0.96	0.59	0.90	12
7	1.14	0.28	0.52	0.36	0.23	0.06	0.43	52
8	1.10	0.86	0.84	0.89	0.35	0.67	0.79	24
9	1.27	1.42	1.86	1.70	0.97	0.80	1.33	1
10	1.06	0.64	0.67	1.15	0.62	0.98	0.85	16
11	0.42	0.19	0.92	0.43	0.81	0.17	0.49	51
12	1.01	0.67	1.54	0.92	1.88	0.91	1.16	4
13	0.68	0.48	0.87	0.74	0.82	0.65	0.71	35
14	0.77	0.89	0.73	0.83	0.62	0.73	0.76	25
15	0.70	0.62	1.55	0.52	1.15	0.60	0.86	14
16	1.00	0.78	0.75	0.78	0.64	0.59	0.76	26
17	0.98	0.69	0.54	0.55	0.63	0.39	0.63	41
18	1.07	0.78	0.50	0.97	0.37	0.67	0.73	31
19	0.95	0.78	0.87	0.79	0.72	0.67	0.80	21
20	1.04	0.58	0.86	0.75	0.28	0.75	0.71	34
21	1.24	0.94	0.77	0.81	0.77	0.38	0.82	19
22	0.95	0.70	0.89	0.92	0.74	0.11	0.72	32
23	0.84	0.38	0.73	0.45	0.71	0.16	0.54	47
24	1.03	0.56	0.67	0.80	0.39	0.31	0.63	43
25	0.78	0.65	0.72	0.75	0.68	0.21	0.63	42
26	1.11	0.85	1.50	1.26	0.90	0.38	1.00	7
27	1.28	1.09	0.59	1.52	0.49	0.59	0.93	9
28	0.97	0.79	0.61	1.15	0.47	0.79	0.80	20
29	0.94	0.26	0.33	0.21	0.22	0.04	0.34	54
30	1.11	0.93	0.87	1.03	0.42	0.18	0.76	27
31	0.77	0.72	1.00	0.90	0.63	0.21	0.70	36
32	0.86	0.57	0.53	0.65	0.49	0.45	0.59	44
33	0.54	0.05	0.64	0.14	1.56	0.50	0.57	45
34	0.88	0.90	0.82	1.05	0.61	0.93	0.87	13
35	0.74	1.20	0.36	1.51	0.15	0.95	0.82	18
36	0.68	0.55	0.73	0.93	0.57	0.71	0.69	37
37	1.01	1.03	0.43	1.34	0.17	0.77	0.79	22
38	0.90	0.75	1.00	1.10	1.18	0.58	0.92	10
39	0.74	0.59	0.16	0.76	0.20	0.80	0.54	48
40	0.85	1.06	1.09	1.23	0.62	0.87	0.95	8
41	0.58	0.53	0.63	0.84	0.52	0.85	0.66	40
42	0.62	0.44	0.63	0.54	0.65	0.22	0.52	49
43	1.11	1.60	0.98	2.05	0.86	0.68	1.21	3
44	0.70	0.68	0.83	0.78	0.74	0.33	0.68	39
45	0.70	0.65	0.73	1.00	1.53	0.81	0.90	11
46	0.69	0.88	1.31	0.93	2.13	0.65	1.10	5
47	0.56	0.23	0.47	0.35	0.42	0.11	0.36	53
48	0.87	0.78	0.98	0.99	0.72	0.72	0.84	17
49	0.73	0.77	1.80	0.80	1.31	0.82	1.04	6
50	0.78	0.63	0.81	0.81	0.73	0.76	0.75	28
51	0.86	0.91	0.44	0.81	0.65	0.60	0.71	33
52	0.90	0.71	0.70	0.84	0.86	0.71	0.79	23
53	0.71	0.72	0.86	0.72	0.76	0.71	0.75	29
54	1.21	1.20	1.88	1.71	1.22	0.46	1.28	2
平均值Mean value	0.88	0.72	0.87	0.88	0.72	0.55	0.77
变异系数 Variation coefficient	0.23	0.41	0.44	0.42	0.56	0.48	0.27

表4

表5

甘薯种质综合指标值F、隶属函数值和D值"

编号 No.	综合指标值 Comprehensive indicators			隶属函数值 Membership function value			D值 D value	排序 Sort
编号 No.	F₁	F₂	F₃	U(X₁)	U(X₂)	U(X₃)	D值 D value	排序 Sort
1	-1.52	-0.56	-0.72	0.23	0.28	0.32	0.26	50
2	-2.26	0.27	0.81	0.13	0.43	0.66	0.32	43
3	1.03	-0.42	-2.11	0.55	0.30	0.00	0.38	35
4	-0.34	0.46	-0.28	0.38	0.46	0.41	0.41	28
5	-1.13	1.07	-0.25	0.28	0.57	0.42	0.39	32
6	0.80	0.57	-0.62	0.52	0.48	0.34	0.47	16
7	-2.17	-1.57	-1.83	0.14	0.09	0.06	0.11	53
8	0.72	-1.13	-0.08	0.51	0.17	0.46	0.40	29
9	4.57	0.51	-0.93	1.00	0.47	0.27	0.71	1
10	0.94	-0.66	1.18	0.54	0.26	0.75	0.50	13
11	-2.93	1.32	-0.29	0.05	0.62	0.41	0.28	47
12	1.65	2.97	0.03	0.63	0.92	0.49	0.68	2
13	-0.87	0.75	0.71	0.31	0.51	0.64	0.43	26
14	0.13	-0.18	0.94	0.44	0.35	0.69	0.46	17
15	-0.25	2.24	-0.29	0.39	0.78	0.41	0.51	12
16	0.14	-0.49	-0.05	0.44	0.29	0.47	0.40	31
17	-0.84	-0.69	-0.45	0.31	0.25	0.38	0.31	45
18	0.35	-1.49	0.37	0.46	0.11	0.56	0.38	33
19	0.29	-0.06	0.18	0.46	0.37	0.52	0.44	23
20	-0.05	-0.89	0.23	0.41	0.22	0.53	0.38	34
21	0.75	-0.82	-1.24	0.51	0.23	0.20	0.37	36
22	-0.34	-0.25	-1.48	0.38	0.33	0.14	0.32	42
23	-1.95	0.05	-1.06	0.17	0.39	0.24	0.25	51
24	-0.70	-1.12	-0.86	0.33	0.18	0.28	0.28	48
25	-1.05	-0.16	-0.66	0.29	0.35	0.33	0.31	44
26	1.67	0.48	-1.59	0.63	0.46	0.12	0.49	14
27	2.18	-1.94	-0.28	0.70	0.03	0.41	0.45	22
28	0.72	-1.02	0.89	0.51	0.19	0.68	0.45	21
29	-3.01	-1.44	-1.28	0.04	0.12	0.19	0.09	54
30	0.53	-1.28	-1.56	0.49	0.15	0.12	0.32	41
31	-0.49	0.04	-0.89	0.36	0.39	0.28	0.35	39
32	-1.14	-0.72	0.05	0.27	0.25	0.49	0.31	46
33	-2.98	2.45	0.59	0.04	0.82	0.61	0.37	37
34	1.01	-0.28	1.26	0.55	0.33	0.76	0.53	9
35	1.48	-1.85	2.30	0.61	0.04	1.00	0.52	10
36	-0.58	0.01	1.11	0.35	0.38	0.73	0.43	27
37	1.26	-2.09	1.01	0.58	0.00	0.71	0.44	25
38	0.76	0.88	-0.04	0.52	0.54	0.47	0.51	11
39	-1.15	-1.45	1.81	0.27	0.12	0.89	0.34	40
40	1.69	-0.03	0.92	0.63	0.37	0.69	0.57	8
41	-0.88	0.06	1.84	0.31	0.39	0.90	0.44	24
42	-2.15	0.14	-0.24	0.15	0.40	0.42	0.27	49
43	4.20	-0.90	0.12	0.95	0.22	0.51	0.66	4
44	-0.84	0.26	-0.23	0.31	0.42	0.43	0.37	38
45	0.21	1.70	1.34	0.45	0.69	0.78	0.58	7
46	1.03	3.44	0.22	0.55	1.00	0.53	0.67	3
47	-3.30	-0.25	-0.31	0.00	0.33	0.41	0.17	52
48	0.59	0.15	0.46	0.49	0.41	0.58	0.49	15
49	1.05	2.71	0.12	0.55	0.87	0.51	0.63	6
50	-0.23	0.27	0.90	0.39	0.43	0.68	0.46	19
51	-0.08	-0.72	0.65	0.41	0.25	0.63	0.40	30
52	0.08	0.08	0.60	0.43	0.39	0.61	0.45	20
53	-0.33	0.48	0.84	0.38	0.46	0.67	0.46	18
54	3.74	1.07	-1.85	0.89	0.57	0.06	0.64	5
权重 Weight				0.52	0.29	0.19

表5

图3

表6

表7

表8

表9

大田试验中不同甘薯种质资源叶片生理与光合测定值及其均值差异分析"

种质名称 Germplasm name	叶面积指数 Leaf area index		叶片相对含水量 Leaf relative water content (%)		叶绿素总量 Total chlorophyll content (mg·g^-1)		净光合速率 Net photosynthetic rate (μmol·m²·s^-1)		气孔导度 Stomatal Conductance (mmol·m^-2·s^-1)		胞间二氧化碳浓度 Intercellular carbon dioxide concentration (mmol·m^-2·s^-1)		蒸腾速率 Transpiration rate (mmol·m^-2·s^-1)
种质名称 Germplasm name	CK	DS	CK	DS	CK	DS	CK	DS	CK	DS	CK	DS	CK	DS
XN18111-1	8.66±0.29	3.42±0.16	85.50±1.14	63.08±0.72	2.50±0.07	2.00±0.03	25.53±1.79	19.25±0.36	0.61±0.07	0.44±0.07	311.44±5.57	277.13±4.01	11.34±0.92	9.37±0.32
20XN30-18	4.77±0.48	2.74±0.16	81.41±0.57	59.23±0.21	2.27±0.06	1.75±0.09	22.74±1.02	13.08±0.50	0.63±0.04	0.44±0.05	290.63±11.46	268.98±6.56	12.60±0.36	6.57±2.52
20XN18-1	7.44±0.50	3.5±0.15	84.25±0.59	60.62±0.44	2.10±0.09	1.47±0.11	22.38±0.18	12.65±0.73	0.47±0.03	0.37±0.06	275.30±12.95	266.46±4.30	10.80±1.01	5.63±0.70
XN1834-11	4.43±0.65	2.07±0.17	83.85±0.76	55.73±0.42	2.13±0.06	1.57±0.09	24.20±1.30	18.79±0.30	0.65±0.04	0.19±0.01	293.72±10.99	212.16±5.87	11.27±0.97	6.23±0.17
XN1892-1	6.93±0.18	5.30±0.18	83.20±0.37	57.32±0.19	2.49±0.06	1.81±0.07	22.14±0.95	17.52±0.18	0.43±0.03	0.35±0.02	290.93±16.08	260.04±1.63	11.05±0.50	8.34±0.26
XN17104-177	6.43±0.62	5.38±0.27	82.54±1.10	57.39±0.28	2.54±0.10	1.85±0.10	24.77±0.55	19.93±0.68	0.68±0.03	0.43±0.03	297.34±19.24	252.34±12.02	13.10±0.76	9.84±0.62
XN17104-46	7.41±0.89	5.10±0.56	81.33±1.22	55.26±0.47	2.64±0.23	1.79±0.04	22.52±1.06	21.12±0.16	0.64±0.08	0.39±0.08	298.51±5.30	259.12±8.18	12.98±1.53	9.83±0.66
XN1862-61	6.14±0.30	3.99±0.86	79.45±1.09	48.20±0.76	2.14±0.12	1.41±0.05	27.56±0.96	17.90±0.59	0.70±0.13	0.59±0.09	280.09±4.11	274.22±2.02	13.14±1.01	10.43±0.74
宁紫薯1号 Ningzishu No.1	4.54±0.30	3.14±0.36	79.05±0.34	46.19±0.18	2.37±0.12	1.38±0.03	23.99±0.69	14.96±0.54	0.65±0.10	0.32±0.02	292.12±5.93	252.82±8.78	12.46±0.62	8.78±0.47
平均值 Mean value	6.31	3.85	82.29	55.89	2.35	1.67	23.98	17.24	0.61	0.39	292.23	258.14	12.08	8.34
变异系数 Variation coefficient	0.23	0.31	0.03	0.10	0.09	0.13	0.07	0.17	0.15	0.28	0.04	0.07	0.08	0.21
t	3.89**		13.36**		6.89**		5.77**		4.53**		4.66**		5.59**
P	0.01		0.01		0.01		0.01		0.01		0.01		0.01

表9

表10

大田试验中不同甘薯种质资源渗透调节和抗氧化系统测定值及其均值差异分析"

不同器官 Different organs	种质名称 Germplasm name	脯氨酸 Pro (μg·g^-1)		丙二醛 MAD (μg·g^-1)		过氧化物酶 POD (u·g^-1·min^-1 FW)		超氧化物歧化酶 SOD (u·g^-1·min^-1 FW)		抗坏血酸过氧化物酶 APX (u·g^-1·min^-1 FW)		过氧化氢酶 CAT (u·g^-1·min^-1 FW)
不同器官 Different organs	种质名称 Germplasm name	CK	DS	CK	DS	CK	DS	CK	DS	CK	DS	CK	DS
叶片 Leave	XN18111-1	118.61±3.71	233.15±3.19	86.32±2.16	135.05±4.01	160.09±1.05	378.97±0.35	310.03±6.96	653.47±10.5	6.57±0.11	12.34±0.35	5.87±0.32	12.31±0.29
	20XN30-18	139.08±3.75	206.53±1.96	53.58±4.23	124.07±0.76	208.03±1.12	334.16±0.91	311.48±2.40	690.90±3.65	6.77±0.01	14.4±0.20	5.54±0.05	12.46±0.22
	20XN18-1	90.67±7.77	201.19±4.72	80.11±1.50	129.55±3.88	181.85±3.72	378.83±8.57	357.55±7.76	592.16±1.83	5.29±0.00	14.13±0.32	6.35±0.15	11.45±0.06
	XN1834-11	132.44±1.70	210.95±4.72	57.94±0.57	135.75±4.23	150.3±6.46	331.18±0.07	345.12±5.25	578.68±16.54	6.90±0.26	13.54±0.43	6.16±0.24	11.47±0.30
	XN1892-1	137.10±1.14	220.37±4.76	71.15±0.03	128.03±1.99	199.29±10.96	368.89±5.06	403.45±2.85	599.01±13.12	6.44±0.38	12.76±0.05	7.58±0.03	10.08±0.33
	XN17104-177	117.96±5.76	224.53±2.10	58.12±3.17	141.02±1.04	143.35±4.64	341.52±2.32	344.72±8.10	580.62±10.15	7.10±0.25	12.58±0.36	5.95±0.07	12.23±0.18
	XN17104-46	129.47±1.88	205.82±3.23	82.69±2.76	137.35±0.49	194.22±7.45	321.00±2.39	375.54±1.94	640.00±13.81	6.50±0.36	14.57±0.19	7.69±0.17	11.74±0.33
	XN1862-61	109.68±7.68	212.06±0.26	69.43±3.00	151.37±4.37	187.22±9.20	326.66±8.43	289.78±7.99	700.34±2.17	5.38±0.04	14.04±0.18	5.87±0.13	10.47±0.24
	宁紫薯1号 Ningzishu No.1	138.03±5.50	225.92±3.01	65.92±1.53	154.49±3.71	203.51±6.11	333.92±8.71	409.42±18.60	622.41±14.26	7.89±0.31	12.12±0.15	6.13±0.11	12.27±0.24
	平均值Mean value	123.67	215.61	69.47	137.41	180.87	346.13	349.68	628.62	6.54	13.39	6.35	11.61
	变异系数 Variation coefficient	0.13	0.05	0.17	0.07	0.13	0.07	0.12	0.07	0.12	0.07	0.12	0.07
	t	-14.21**		-13.10**		-14.95**		-13.52**		-16.50**		-13.84**
	P	0.01		0.01		0.01		0.01		0.01		0.01
块根 Storage root	XN18111-1	98.01±1.57	169.05±4.58	83.62±2.70	120.40±1.75	155.67±4.50	317.87±6.11	293.25±2.17	435.48±15.74	8.28±0.15	11.83±0.16	4.19±0.12	9.51±0.26
	20XN30-18	86.28±5.59	178.66±5.33	62.62±1.56	105.05±3.74	146.68±6.53	327.06±2.67	260.90±14.83	510.67±6.62	7.61±0.20	11.71±0.43	6.36±0.06	9.23±0.09
	20XN18-1	143.15±0.26	161.34±4.67	68.35±2.24	132.33±3.00	151.99±5.06	324.97±5.20	204.10±14.38	456.94±3.88	5.34±0.10	9.74±0.33	6.55±0.33	9.21±0.19
	XN1834-11	123.14±3.14	173.44±0.65	61.38±1.28	136.29±3.03	183.14±10.89	307.14±12.01	277.52±15.97	481.95±15.29	7.03±0.16	12.85±0.09	6.03±0.15	7.30±0.16
	XN1892-1	133.15±5.85	194.99±3.54	78.23±4.75	126.21±4.01	156.17±5.76	258.31±0.42	358.60±2.40	440.73±3.31	7.31±0.07	9.72±0.06	5.49±0.05	9.42±0.29
	XN17104-177	114.38±7.86	156.58±4.06	77.77±3.82	101.34±1.34	216.23±9.77	326.32±4.15	243.96±1.83	476.14±4.11	5.54±0.37	11.77±0.18	4.75±0.23	8.35±0.30
	XN17104-46	112.31±1.70	194.25±5.63	76.36±2.76	129.80±4.40	166.45±2.32	248.72±10.05	302.85±11.18	439.84±4.79	7.78±0.14	12.12±0.36	4.42±0.10	9.06±0.23
	XN1862-61	111.04±5.06	217.65±3.71	62.13±1.04	126.15±3.00	201.87±8.15	307.98±7.17	254.04±15.40	520.76±12.44	7.12±0.12	11.59±0.08	5.20±0.18	8.96±0.25
	宁紫薯1号 Ningzishu No.1	136.11±7.42	188.10±1.14	70.47±3.77	108.18±0.41	208.33±5.06	302.67±2.88	254.28±4.34	533.50±17.68	6.21±0.39	10.34±0.16	5.54±0.08	7.53±0.13
	平均值Mean value	117.51	181.56	71.21	120.64	176.28	302.34	272.17	477.33	6.91	11.30	5.39	8.73
	变异系数 Variation coefficient	0.16	0.11	0.11	0.11	0.15	0.10	0.16	0.08	0.15	0.10	0.15	0.09
	t	-7.22**		-9.80**		-9.56**		-10.76**		-8.80**		-8.57**
	P	0.01		0.01		0.01		0.01		0.01		0.01

表10

表11

6个主成分的特征向量值、特征值、方差贡献率和累积贡献率"

指标Index	PC1	PC2	PC3	PC4	PC5	PC6
主茎长Stem length	0.22	-0.23	-0.22	0.08	0.05	-0.22
茎粗Stem diameter	-0.15	0.06	0.09	-0.18	0.25	0.30
分枝数Number of branches	0.16	-0.22	0.18	-0.14	0.29	0.09
地上部鲜重Aboveground fresh weight	-0.04	-0.33	0.12	-0.09	0.24	0.10
地下部鲜重Underground fresh weight	0.32	-0.03	0.17	-0.10	-0.16	0.07
叶面积指数Leaf area index	-0.10	-0.17	-0.26	0.13	0.01	-0.36
叶片相对含水量Leaf relative water content	0.12	0.38	0.02	0.02	0.05	-0.15
叶绿素总量Total chlorophyll content	0.16	0.32	0.02	-0.13	0.13	-0.10
总根长Total root length	-0.22	0.18	-0.17	0.17	0.25	0.06
根体积Root volume	0.32	0.08	-0.07	-0.17	-0.06	0.15
根表面积Root surface area	0.26	0.18	-0.07	-0.26	0.13	-0.07
根尖数Root tip number	0.00	0.35	0.04	0.09	0.08	-0.29
净光合速率Net photosynthesis rate	0.02	0.07	-0.38	-0.11	0.02	0.19
气孔导度Stomatal conductance	0.21	0.02	0.04	0.41	0.03	-0.15
胞间二氧化碳浓度Intercellular CO₂ concentration	0.16	-0.07	0.16	0.40	0.03	-0.12
蒸腾速率Transpiration rate	0.12	-0.14	-0.29	0.13	0.26	0.19
叶片Pro Leaf Pro	-0.07	0.13	0.12	0.38	0.15	0.27
叶片MAD Leaf MAD	-0.19	-0.18	0.09	-0.22	0.12	-0.30
叶片POD Leaf POD	-0.11	0.27	-0.06	0.02	0.24	0.19
叶片SOD Leaf SOD	0.21	-0.06	0.26	0.01	0.25	0.06
叶片APX Leaf APX	0.08	0.06	0.22	0.27	-0.19	0.20
叶片CAT Leaf CAT	-0.06	0.03	0.25	-0.16	0.38	-0.16
块根Pro Storage root Pro	0.28	-0.12	0.11	-0.13	0.15	-0.09
块根MAD Storage root MAD	-0.03	-0.02	0.23	-0.09	-0.32	0.33
块根POD Storage root POD	0.14	0.25	0.28	0.01	-0.01	-0.15
块根SOD Storage root SOD	-0.21	-0.09	0.33	0.13	0.09	-0.06
块根APX Storage root APX	-0.34	0.07	0.06	0.03	0.15	-0.01
块根CAT Storage root CAT	0.22	0.07	-0.22	0.13	0.27	0.18
产量Yield	0.15	-0.25	-0.01	0.21	0.15	0.06
特征值Eigenvalues	6.65	5.85	4.94	3.77	3.31	1.97
方差贡献率Variance contribution (%)	22.94	20.19	17.03	12.99	11.43	6.79
累积贡献率Cumulative variance contribution (%)	22.94	43.12	60.15	73.14	84.57	91.36

表11

表12

图4

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编号 No.	种质名称 Germplasm name	初筛 Primary screening	复筛 Secondary screening	编号 No.	种质名称 Germplasm name	初筛 Primary screening	复筛 Secondary screening	编号 No.	种质名称 Germplasm name	初筛 Primary screening	复筛 Secondary screening
1	XN1904-22	√		21	20XN06-2	√		41	20XN14-3	√
2	20XN17-2	√		22	XN1638-3	√		42	烟薯25	√
3	XN1997-1	√		23	XN1820-1	√		43	XN1834-11	√	√
4	20XN30-18	√	√	24	XN17104-36	√		44	XN1914-5	√
5	XN1862-11	√		25	XN1878-7	√		45	XN1863-76	√
6	XN1803-1	√		26	XN1869-2	√		46	XN18119-2	√
7	XN1848-5	√		27	XN17104-46	√	√	47	20XN29-3	√
8	XN17104-177	√	√	28	XN1863-1	√		48	XN1876-1	√
9	20XN18-1	√	√	29	XN17104-105	√		49	XN1864-6	√
10	XN1607-3	√		30	20XN05-10	√		50	20XN11-8	√
11	XN1945-8	√		31	20XN05-1	√		51	20XN20-9	√
12	XN1607-3-5	√		32	20XN14-1	√		52	20XN30-16	√
13	XN1764-7	√		33	XN1862-61	√	√	53	XN1979-2	√
14	XN1756-2	√		34	20XN06-4	√		54	XN1723-8	√
15	XN1907-12	√		35	XN1849-2	√		总计 Total		54	9
16	XN17101-2	√		36	XN1823-2	√
17	XN1892-1	√	√	37	宁紫薯1号	√	√
18	XN1864-60	√		38	20XN03-2	√
19	20XN17-4	√		39	XN17104-109	√
20	XN356	√		40	XN18111-1	√	√

种质名称 Germplasm name	CK (kg·hm^-2)	DS (kg·hm^-2)	耐旱系数 Drought resistance coefficient	耐旱评价 Drought tolerance evaluation
XN18111-1	27787.05±1248.45b	24970.50±951.15a	0.90a	耐旱 Drought tolerant
20XN30-18	21292.20±981.00b	15589.65±645.00d	0.38e	不耐旱 Drought susceptible
20XN18-1	28627.80±1248.45c	10887.75±59.40c	0.73c	耐旱 Drought tolerant
XN1834-11	9878.85±297.31e	7377.60±327.00f	0.75b	耐旱 Drought tolerant
XN1892-1	4708.21±118.95e	945.90±89.25h	0.20h	不耐旱 Drought susceptible
XN17104-177	46241.55±1189.05a	16647.00±356.70b	0.36f	不耐旱 Drought susceptible
XN17104-46	22280.10±2377.95c	15133.65±1783.50c	0.68d	耐旱 Drought tolerant
XN1862-61	22153.95±772.82c	8659.80±237.75e	0.39e	不耐旱 Drought susceptible
宁紫薯1号 Ningzishu No.1	18706.80±2080.81d	4624.20±594.45g	0.25g	不耐旱 Drought susceptible

种质名称 Germplasm name	主茎长 Main stem length (cm)		茎粗 Stem diameter (mm)		分枝数 Number of branches			地上部鲜重 Aboveground fresh weight (g)		地下部鲜重 Underground fresh weight (g)
种质名称 Germplasm name	CK	DS	CK	DS	CK		DS	CK	DS	CK	DS
XN18111-1	374.01±9.52	242.33±17.01	5.82±0.22	5.15±0.08	5.02±0.29		3.67±0.48	788.33±10.41	423.78±4.91	20.40±0.70	12.32±1.23
20XN30-18	198.01±5.19	132.33±5.13	6.81±0.24	5.92±0.06	3.67±0.48		2.67±0.58	582.22±15.49	300.02±31.22	17.68±0.23	13.87±0.74
20XN18-1	284.33±4.04	131.33±3.51	6.45±0.06	5.61±0.18	4.67±0.50		2.33±0.43	724.44±35.84	282.01±12.77	19.47±1.75	8.75±0.74
XN1834-11	188.67±14.64	86.67±12.66	6.52±0.21	5.83±0.11	5.33±0.65		3.33±0.34	459.44±23.65	228.89±14.56	28.52±1.99	14.63±0.80
XN1892-1	349.33±3.79	275.67±13.61	6.81±0.09	5.43±0.11	5.67±0.18		3.00±0.16	829.67±43.25	305.10±22.91	16.83±0.77	9.44±0.17
XN17104-177	211.37±15.93	131.33±11.02	6.37±0.11	5.67±0.08	6.33±0.62		3.67±0.34	782.78±18.43	387.00±33.65	104.59±7.49	10.64±0.58
XN17104-46	209.01±14.78	150.01±12.55	6.45±0.15	5.82±0.04	5.67±0.89		3.33±0.15	778.33±18.93	340.33±13.43	21.56±0.99	13.14±1.99
XN1862-61	242.67±18.77	174.33±7.02	6.44±0.15	5.57±0.12	3.33±0.30		2.67±0.27	498.67±15.18	337.33±12.50	8.93±0.37	6.16±0.32
宁紫薯1号 Ningzishu No.1	234.33±10.69	164.01±12.15	6.24±0.12	5.47±0.13	5.33±0.30		3.67±0.56	443.33±43.68	333.33±18.93	20.40±0.70	6.87±0.74
平均值 Mean value	254.64	165.33	6.43	5.61	5.00		3.15	654.13	326.41	28.71	10.65
变异系数 Variation coefficient	0.26	0.36	0.05	0.04	0.19		0.16	0.24	0.18	1.01	0.29
t	2.99**		6.49**			5.07**		5.88		1.86
P	0.01		0.01			0.01		0.01		0.08

种质名称 Germplasm name	总根长 Total root length (cm)		根体积 Root volume (cm³)		根表面积 Root surface area (cm²)		根尖数 Root tip number
种质名称 Germplasm name	CK	DS	CK	DS	CK	DS	CK	DS
XN18111-1	256.42±4.59	179.04±5.68	2.59±0.21	2.16±0.08	108.90±6.84	75.79±3.30	371.33±6.03	254.33±9.29
20XN30-18	430.62±12.97	327.44±1.05	3.27±0.13	2.23±0.11	124.01±8.24	81.71±4.81	830.33±8.14	622.33±11.68
20XN18-1	517.58±9.88	335.27±14.52	4.12±0.24	2.27±0.14	164.46±6.72	83.21±1.88	873.33±9.87	648.17±12.17
XN1834-11	215.51±6.86	115.67±5.71	2.37±0.20	1.57±0.06	69.11±6.88	42.04±2.70	367.33±7.51	235.67±13.65
XN1892-1	210.81±10.07	123.66±5.99	3.42±0.20	2.56±0.06	65.19±6.57	40.04±4.34	331±16.09	222.00±17.06
XN17104-177	99.61±2.66	56.88±7.28	1.69±0.10	0.76±0.10	48.37±5.29	27.16±1.49	147.33±8.08	114.33±9.50
XN17104-46	190.82±6.67	130.00±8.40	1.77±0.10	1.18±0.51	77.68±5.54	46.52±1.98	270.67±7.02	171.33±8.02
XN1862-61	283.57±9.65	151.39±5.48	1.88±0.06	1.12±0.11	76.47±3.47	40.83±2.35	464.33±7.64	267.67±11.06
宁紫薯1号 Ningzishu No.1	459.42±15.84	216.59±10.62	1.91±0.05	1.09±0.16	70.15±1.81	35.82±1.30	624.39±13.14	307.00±7.21
平均值 Mean value	8.80	7.19	2.56	1.66	89.37	52.57	475.56	315.87
变异系数 Variation coefficient	0.47	0.52	0.34	0.39	0.41	0.41	0.53	0.60
t	0.87		2.48*		2.62*		1.53
P	0.40		0.02		0.02		0.15

耐旱甘薯种质资源的筛选与鉴定

Screening and Identification of Drought-Tolerant Sweet Potato Germplasm Resources

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种质名称 Germplasm name	F₁	F₂	F₃	F₄	F₅	F₆	U(X₁)	U(X₂)	U(X₃)	U(X₄)	U(X₅)	U(X₆)	D值 D value	排序 Sort
XN18111-1	1.37	1.44	2.40	1.96	4.19	1.03	1.00	0.83	0.31	0.76	0.78	1.00	0.77	1
20XN30-18	1.32	0.83	3.42	1.29	3.42	0.12	0.97	0.34	1.00	0.19	0.28	0.00	0.57	4
20XN18-1	0.30	1.65	3.08	2.24	3.26	1.02	0.37	1.00	0.77	1.00	0.18	0.99	0.70	2
XN1834-11	0.28	1.17	2.77	1.06	3.16	0.81	0.36	0.62	0.56	0.00	0.11	0.76	0.40	8
XN1892-1	1.21	0.98	1.94	1.65	2.99	0.65	0.91	0.46	0.00	0.50	0.00	0.58	0.44	7
XN17104-177	-0.33	1.48	1.97	1.97	4.53	0.47	0.00	0.86	0.02	0.77	1.00	0.38	0.46	6
XN17104-46	1.02	1.10	2.02	1.70	3.30	0.93	0.79	0.56	0.05	0.54	0.20	0.89	0.50	5
XN1862-61	1.21	0.45	3.15	2.16	3.57	0.92	0.91	0.04	0.82	0.93	0.38	0.88	0.63	3
宁紫1号Ningzishu No.1	0.34	0.40	2.53	1.47	3.56	0.34	0.39	0.00	0.40	0.35	0.37	0.24	0.29	9
权重Weight coefficient							0.25	0.22	0.19	0.14	0.13	0.07

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