糜子核心种质成株期抗旱性鉴定评价与抗旱种质筛选

doi:10.3864/j.issn.0578-1752.2023.21.003

Abstract

Abstract:

【Objective】Drought is one of the major constraints influencing on the growth, development, and yield of proso millet. To screen excellent drought-tolerant accessions and identification indicators will promote the drought-tolerant varieties breeding and drought tolerance molecular mechanisms analysis of proso millet.【Method】In this study, 200 core germplasm accessions of proso millet were used to identify field drought tolerance at adult stage in 2021-2022 at Dunhuang, Gansu province, with two treatments of normal irrigation and drought stress. Eleven morphological indicators, such as leaf area (LA), main stem diameter (MSD), number of main stem nodes (NMSN), main panicle length (MPL), peduncle length (PL), plant height (PH), straw weight per plant (SWPP), panicle weight per plant (PWPP), grain weight per plant (GWPP), thousand grain weight (TGW), and yield per plot (YPP) were determined. Comprehensive drought tolerance coefficient (CDTC value), drought resistance index (DRI value), and drought resistance comprehensive evaluation value (D value) were combined to identify the drought tolerance of proso millet at adult stage.【Result】There were significant differences in all eleven indexes among different accessions under different water treatments, including leaf area, main stem diameter, number of main stem nodes, main panicle length, peduncle length, plant height, straw weight per plant, panicle weight per plant, grain weight per plant, thousand grain weight, and yield per plot. The growth of proso millet was inhibited under drought stress treatments. Compared with the normal irrigation treatments, all the eleven indexes under drought treatments were significantly reduced, and yield per plot was more sensitive to drought treatments. The correlation analysis found that certain degrees of correlation existed among the drought tolerance coefficients of all traits, the correlation between panicle weight per plant and grain weight per plant was strongest, with a correlation coefficient of 0.943. Eleven evaluation indexes were converted into six comprehensive indexes by principal component analysis, with a cumulative variance contribution of 80.667%. The drought tolerance ranking of proso millet accessions based on CDTC value, DRI value and D value was generally consistent. The 200 proso millet accessions were classified into four categories according to D value cluster analysis, 10 of cluster Ⅰ were highly drought tolerant, 70 of cluster Ⅱ were drought tolerant, 81 of cluster Ⅲ were drought sensitive, and 39 of cluster Ⅳ were highly drought sensitive. Plant height, grain weight per plant, panicle weight per plant and main panicle length were highly correlated with D value, with correlation coefficients of 0.756, 0.697, 0.696 and 0.679, respectively. The regression equation for the drought tolerance evaluation was constructed by stepwise regression analysis: Y=-1.509+0.362X₁+0.174X₂+0.349X₃+0.389X₄+0.307X₅+ 0.251X₆+0.218X₇.【Conclusion】The drought resistance comprehensive evaluation value method could be suitable for evaluating the drought resistance of proso millet at adult stage. Ten accessions with highly drought tolerance, such as Balinzuogedashu (00000525), Gaotaiwumizi (00002677) and Minlehongmizi (00002687). Plant height, panicle weight per plant and main panicle length could be used as primary evaluation indexes for drought tolerance of proso millet at adult stage.

Key words: proso millet, adult stage in the field, drought tolerance identification, drought tolerant germplasm screening

WANG Qian, DONG KongJun, XUE YaPeng, LIU ShaoXiong, WANG RuoNan, YANG JiaQi, LU Ping, WANG RuiYun, YANG TianYu, LIU MinXuan. Identification and Evaluation of Drought Tolerance and Screening of Drought-Tolerant Germplasm for Core Germplasms in Proso Millet at Adult Stage[J].Scientia Agricultura Sinica, 2023, 56(21): 4163-4174.

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性状 Trait	处理 Treatment	平均值 Average	最小值 Min	最大值 Max	标准偏差 SD	变异系数 CV	t值 t-value	相关系数 r
株高 PH (cm)	WW	148.37	79.10	182.51	23.01	0.16	-30.823	0.839
株高 PH (cm)	DS	119.80	73.57	146.03	15.42	0.13	-30.823	0.839
穗下节间长度 PL (cm)	WW	22.87	16.53	32.03	2.49	0.11	-7.548	0.708
穗下节间长度 PL (cm)	DS	21.86	15.68	28.00	2.46	0.11	-7.548	0.708
主茎直径 MSD (cm)	WW	7.41	4.36	9.10	1.02	0.14	-3.175	0.910
主茎直径 MSD (cm)	DS	7.31	4.22	9.08	0.97	0.13	-3.175	0.910
主茎节数 NMSN	WW	7.32	6.43	8.00	0.34	0.05	-19.921	0.719
主茎节数 NMSN	DS	6.95	6.03	7.82	0.36	0.05	-19.921	0.719
主穗长 MPL (cm)	WW	36.62	21.01	45.72	4.31	0.12	-17.773	0.799
主穗长 MPL (cm)	DS	33.28	21.28	44.02	4.03	0.12	-17.773	0.799
叶面积 LA (cm²)	WW	54.32	26.56	68.66	8.86	0.16	-9.354	0.851
叶面积 LA (cm²)	DS	51.20	25.40	69.78	8.28	0.16	-9.354	0.851
单株草重 SWPP (g)	WW	25.65	6.18	59.38	9.32	0.36	-6.362	0.902
单株草重 SWPP (g)	DS	23.83	6.77	50.07	8.72	0.37	-6.362	0.902
单株穗重 PWPP (g)	WW	18.20	9.73	30.57	3.71	0.20	-16.056	0.537
单株穗重 PWPP (g)	DS	14.60	8.68	23.72	2.50	0.17	-16.056	0.537
单株粒重 GWPP (g)	WW	11.06	4.87	19.42	2.61	0.24	-17.256	0.546
单株粒重 GWPP (g)	DS	8.30	3.75	15.15	2.00	0.24	-17.256	0.546
千粒重 TGW (g)	WW	5.97	4.50	7.03	0.61	0.10	-11.638	0.832
千粒重 TGW (g)	DS	5.69	4.18	6.85	0.58	0.10	-11.638	0.832
小区产量 YPP (g)	WW	216.92	61.68	446.72	86.14	0.40	-16.619	0.805
小区产量 YPP (g)	DS	156.78	44.50	385.92	66.83	0.43	-16.619	0.805

性状Trait	最小值Min	最大值Max	平均值Average	标准偏差SD	变异系数CV
株高PH	0.644	1.034	0.815	0.072	0.089
穗下节间长度PL	0.771	1.247	0.959	0.081	0.085
主茎直径MSD	0.835	1.237	0.990	0.061	0.062
主茎节数NMSN	0.857	1.060	0.950	0.035	0.037
主穗长MPL	0.708	1.126	0.911	0.070	0.077
叶面积LA	0.696	1.241	0.947	0.088	0.093
单株草重SWPP	0.523	1.461	0.942	0.163	0.173
单株穗重PWPP	0.531	1.246	0.820	0.152	0.185
单株粒重GWPP	0.452	1.376	0.770	0.181	0.232
千粒重TGW	0.783	1.131	0.954	0.059	0.061
小区产重YPP	0.399	1.319	0.743	0.188	0.253

性状 Trait	主成分Principal component
性状 Trait	第1主成分 PC1	第2主成分 PC2	第3主成分 PC3	第4主成分 PC4	第5主成分 PC5	第6主成分 PC6
株高PH	0.691	0.425	-0.074	-0.310	-0.086	0.035
穗下节间长度PL	0.149	0.597	-0.245	0.519	-0.015	0.061
主茎直径MSD	0.330	0.145	0.509	0.086	0.662	0.386
主茎节数NMSN	0.325	0.574	0.009	-0.363	-0.376	0.405
主穗长MPL	0.564	0.491	-0.050	0.308	0.087	-0.206
叶面积LA	0.379	0.326	0.462	-0.193	0.008	-0.638
单株草重SWPP	0.231	-0.239	0.690	0.392	-0.314	0.113
单株穗重PWPP	0.821	-0.404	-0.001	0.142	-0.158	0.086
单株粒重GWPP	0.831	-0.409	-0.061	0.059	-0.129	0.063
千粒重TGW	0.549	-0.091	-0.399	0.223	0.299	-0.022
小区产量YPP	0.561	-0.427	-0.205	-0.350	0.106	-0.126
特征值 Eigenvalues	3.209	1.814	1.222	0.968	0.832	0.800
贡献率Contribution rate (%)	29.174	16.487	11.105	8.966	7.595	7.340
累积贡献率Cumulative contribution (%)	29.174	45.660	56.766	65.732	73.327	80.667

排名 Rank	序号 Number	材料名称 Material name	CDTC值 CDTC value	序号 Number	材料名称 Material name	DRI值 DRI value	序号 Number	材料名称 Material name	D值 D value
1	188	糜子 Mizi	1.083	194	黄糜子 Huangmizi	4.252	80	巴林左疙塔黍 Balinzuogedashu	0.692
2	80	巴林左疙塔黍 Balinzuogedashu	1.070	93	灵武70天 Lingwu70tian	3.111	12	高台乌糜子 Gaotaiwumizi	0.671
3	33	骨都白 Gudoubai	1.066	193	花糜子 Huamizi	2.966	14	民乐红糜子 Minlehongmizi	0.659
4	109	白圪塔糜 Baigedami	1.046	192	糜子 Mizi	2.845	33	骨都白 Gudoubai	0.648
5	107	小青糜 Xiaoqingmi	1.030	188	糜子 Mizi	2.730	109	白圪塔糜 Baigedami	0.638
6	81	五原黑黍子 Wuyuanheishuzi	1.026	186	白糜子 Baimizi	2.545	199	笊篱白 Zhaolibai	0.633
7	190	黄糜子 Huangmizi	1.022	191	额敏红糜 Eminhongmi	2.511	51	黄糜子 Huangmizi	0.630
8	28	古浪半个红 Gulangbangehong	1.018	51	黄糜子 Huangmizi	2.410	52	白糜子 Baimizi	0.626
9	51	黄糜子 Huangmizi	1.003	127	小白黍 Xiaobaishu	2.376	53	红鹌鹑尾 Honganchunwei	0.625
10	29	S02036	0.997	31	小黍子 Xiaoshuzi	2.275	97	小黄糜子 Xiaohuangmizi	0.625

指标Index	CDTC值CDTC value	DRI值DRI value	D值D value
CDTC值CDTC value	1
DRI值DRI value	0.580**	1
D值D value	0.685**	0.515**	1

Identification and Evaluation of Drought Tolerance and Screening of Drought-Tolerant Germplasm for Core Germplasms in Proso Millet at Adult Stage

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指标 Index	相关系数 Correlation coefficient	P值 P value
株高PH	0.756	0.000
穗下节间长度PL	0.341	0.000
主茎直径MSD	0.448	0.000
主茎节数NMSN	0.446	0.000
主穗长MPL	0.679	0.000
叶面积LA	0.318	0.000
单株草重SWPP	0.138	0.000
单株穗重PWPP	0.696	0.000
单株粒重GWPP	0.697	0.000
千粒重TGW	0.491	0.000
产量YPP	0.372	0.000

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