中国农业科学 ›› 2019, Vol. 52 ›› Issue (23): 4201-4214.doi: 10.3864/j.issn.0578-1752.2019.23.002
收稿日期:
2019-05-28
接受日期:
2019-07-24
出版日期:
2019-12-01
发布日期:
2019-12-01
通讯作者:
吴昆仑
作者简介:
白羿雄,E-mail:yixiongbai@163.com
基金资助:
BAI YiXiong1,2,ZHENG XueQing1,YAO YouHua1,YAO XiaoHua1,WU KunLun1()
Received:
2019-05-28
Accepted:
2019-07-24
Online:
2019-12-01
Published:
2019-12-01
Contact:
KunLun WU
摘要:
【目的】解析青稞种质资源表型形状的遗传多样性关系及筛选综合性状优异的青稞种质,可为青稞育种及重要性状深入研究提供理论依据。【方法】通过对205份青稞15个表型性状采用Shannon-Wiener’s多样性指数进行遗传多样性分析。分析参试青稞种质15个表型性状在西宁试验点和海北试验点的频次分布规律。对各性状利用相关性分析以明确性状间联系;对参试种质进行聚类分析以明确其分类情况。利用主成分分析构建青稞种质综合评价体系,并通过线性回归分析对该体系进行验证。依据综合评价及丰产稳产性分析结果以筛选优异青稞种质。【结果】倒伏率遗传变异程度最丰富而重心位置遗传变异最匮乏,海北点遗传变异程度高于西宁点。穗重遗传多样性最丰富,倒伏率遗传单一性最高。除倒伏率外各性状指标均呈正态或偏态分布,分布频次呈中间高两边低的分布趋势;穗长、穗重在各基因型中呈正态分布。各表型性状受环境、基因型、年份影响极显著,且各表型性状的基因型与环境(G×E)、基因型与年份(G×Y)、基因型×环境×年份(G×E×Y)的互作效应均呈极显著。青稞根系、茎秆和穗部组织内各指标间存在显著相关性,且各组织间的农艺性状也存在显著相关性。根系发达、茎部抗折力高的青稞种质其机械固持能力强,倒伏率低;严重倒伏会限制青稞种质穗部生长发育,使穗长变短、穗粒数减少、籽粒变小、穗重变轻、进而使产量锐减。聚类结果表明参试种质可分为三类,第一类是高重心、易倒伏、其余性状居中的种质;第二类是矮秆、低重心且其余性状表现良好的优异种质;第三类是株高较高、根系欠发达、茎部易折、穗部性状表现差的种质。结合F值和丰产稳产性分析结果筛选出综合性状表现优异且有较高丰产稳产性的青稞种质5份。【结论】参试青稞种质资源的遗传多样性丰富;穗长、穗重在各基因型中呈正态分布,除倒伏率外,其余12个性状在基因型中呈偏态分布;根干重、重心位置、茎秆壁厚、茎粗、茎秆强度、穗长、穗粒数、产量8个指标可作为核心种质评价的综合指标。
白羿雄, 郑雪晴, 姚有华, 姚晓华, 吴昆仑. 青稞种质资源表型性状的遗传多样性分析及综合评价[J]. 中国农业科学, 2019, 52(23): 4201-4214.
BAI YiXiong, ZHENG XueQing, YAO YouHua, YAO XiaoHua, WU KunLun. Genetic Diversity Analysis and Comprehensive Evaluation of Phenotypic Traits in Hulless Barley Germplasm Resources[J]. Scientia Agricultura Sinica, 2019, 52(23): 4201-4214.
表1
青稞种质资源的表型性状"
表型性状Phenotypic traits | 平均值Mean±SD | 变幅Range | 变异系数CV (%) | 多样性指数H′ |
---|---|---|---|---|
根数NOR | 30.13±9.70 | 9.33—75.33 | 32.18 | 1.99 |
根干重RDW (g) | 0.65±0.33 | 0.04—2.41 | 51.52 | 1.94 |
株高PH (cm) | 93.19±15.12 | 41.75—135.34 | 16.23 | 2.07 |
分蘖数NOT | 5.22±2.22 | 1.00—19.75 | 42.44 | 2.03 |
重心位置COG (cm) | 37.27±5.47 | 22.38—67.06 | 14.68 | 2.06 |
茎秆壁厚WT (mm) | 0.61±0.27 | 0.10—2.03 | 45.19 | 1.99 |
茎粗DMS (mm) | 3.86±1.10 | 1.19—7.53 | 28.57 | 2.03 |
茎秆强度SS (N) | 4.94±2.50 | 0.97—15.81 | 50.58 | 1.95 |
穗长SL (cm) | 7.17±1.66 | 2.50—14.25 | 23.14 | 2.07 |
穗重PW (g) | 2.70±1.04 | 0.45—6.04 | 38.34 | 2.08 |
小穗数SN | 19.91±4.38 | 5.00—42.50 | 21.85 | 2.07 |
穗粒数KPS | 46.77±16.15 | 8.25—98.00 | 34.54 | 2.07 |
千粒重TGW (g) | 39.95±7.09 | 21.51—72.45 | 17.74 | 2.04 |
产量Y (kg·hm-2) | 4396.80±2249.39 | 361.42—15409.74 | 51.16 | 2.01 |
倒伏率LR (%) | 32.18±39.10 | 0.00—100.00 | 121.49 | 1.41 |
表2
表型性状在不同环境下的变异"
表型性状 Phenotypic traits | 西宁Xining | 海北Haibei | ||||
---|---|---|---|---|---|---|
平均值Mean±SD | 变幅Range | 变异系数CV (%) | 平均值Mean±SD | 变幅Range | 变异系数CV (%) | |
根数NOR | 33.89±10.57 | 9.33—75.33 | 31.19 | 26.38±6.96 | 12.50—52.67 | 26.40 |
根干重RDW (g) | 0.79±0.35 | 0.17—2.41 | 44.06 | 0.50±0.24 | 0.04—1.64 | 48.23 |
株高PH (cm) | 97.84±15.36 | 47.25—135.34 | 15.70 | 88.53±13.36 | 41.75—122.50 | 15.09 |
分蘖数NOT | 6.35±2.17 | 2.75—19.75 | 34.23 | 4.10±1.60 | 1.00—10.50 | 39.18 |
重心位置COG (cm) | 38.64±5.56 | 22.38—67.06 | 14.38 | 35.90±5.03 | 22.50—50.00 | 14.01 |
茎秆壁厚WT (mm) | 0.64±0.24 | 0.18—2.03 | 37.89 | 0.57±0.30 | 0.10—1.61 | 52.15 |
茎粗DMS (mm) | 4.58±0.67 | 2.63—7.53 | 14.59 | 3.13±0.96 | 1.19—6.00 | 30.75 |
茎秆强度SS (N) | 5.58±2.98 | 0.97—15.81 | 53.39 | 4.30±1.68 | 1.50—11.59 | 39.03 |
穗长SL (cm) | 7.35±1.63 | 3.10—14.13 | 22.17 | 7.00±1.67 | 2.50—14.25 | 23.92 |
穗重PW (g) | 2.77±0.99 | 0.58—5.47 | 35.59 | 2.63±1.08 | 0.45—6.04 | 41.02 |
小穗数SN | 20.32±4.11 | 5.00—32.00 | 20.25 | 19.55±4.56 | 6.25—42.50 | 23.31 |
穗粒数KPS | 50.11±15.16 | 9.75—89.25 | 30.25 | 43.43±16.44 | 8.25—98.00 | 37.86 |
千粒重TGW (g) | 38.54±7.60 | 21.51—72.45 | 19.73 | 41.36±6.23 | 26.59—57.60 | 15.06 |
产量Y (kg·hm-2) | 5533.06±2269.52 | 1223.29—15409.74 | 41.02 | 3260.54±1546.84 | 361.42—8073.53 | 47.44 |
倒伏率LR (%) | 41.69±42.48 | 0.00—100.00 | 101.89 | 22.67±32.79 | 0.00—100.00 | 144.62 |
表3
参试材料正态性检验"
环境 Environment | 西宁 Xining | 海北 Haibei | 西宁和海北 Xining and Haibei |
---|---|---|---|
根数NOR | 0.00 | 0.00 | 0.00 |
根干重RDW (g) | 0.00 | 0.00 | 0.00 |
株高PH (cm) | 0.05 | 0.05+ | 0.02 |
分蘖数NOT | 0.00 | 0.00 | 0.00 |
重心位置COG (cm) | 0.00 | 0.00 | 0.00 |
茎秆壁厚WT (mm) | 0.01 | 0.00 | 0.00 |
茎粗DMS (mm) | 0.01 | 0.00 | 0.00 |
茎秆强度SS (N) | 0.00 | 0.00 | 0.00 |
穗长SL (cm) | 0.08+ | 0.20+ | 0.20+ |
穗重PW (g) | 0.20+ | 0.09+ | 0.20+ |
小穗数SN | 0.00 | 0.00 | 0.00 |
穗粒数KPS | 0.00 | 0.14+ | 0.00 |
千粒重TGW (g) | 0.00 | 0.20+ | 0.00 |
产量Y (kg·hm-2) | 0.02 | 0.00 | 0.00 |
倒伏率LR (%) | 0.00 | 0.00 | 0.00 |
表4
基因型、环境和年份的互作效益分析"
变异来源 Variance sources | df | 根数NOR | 根干重RDW | 株高PH | 分蘖数NOT | 重心位置COG | 茎秆壁厚WT | 茎粗DMS | 茎秆强度SS | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
F | P | F | P | F | P | F | P | F | P | F | P | F | P | F | P | ||
基因型Genotype(G) | 204 | 3.45 | 0.00 | 6.00 | 0.00 | 32.37 | 0.00 | 5.17 | 0.00 | 13.26 | 0.00 | 19.29 | 0.00 | 7.79 | 0.00 | 7.36 | 0.00 |
年份Year(Y) | 1 | 598.80 | 0.00 | 1070.65 | 0.00 | 1323.06 | 0.001 | 1012.97 | 0.00 | 329.45 | 0.00 | 10457.98 | 0.00 | 16269.04 | 0.00 | 379.88 | 0.00 |
环境Environment(E) | 1 | 808.24 | 0.00 | 938.84 | 0.00 | 11.64 | 0.00 | 75.26 | 0.00 | 162.51 | 0.00 | 16954.86 | 0.00 | 3809.00 | 0.00 | 1395.45 | 0.00 |
基因型×环境G×E | 204 | 2.83 | 0.00 | 4.03 | 0.00 | 7.66 | 0.00 | 2.46 | 0.00 | 3.44 | 0.00 | 16.18 | 0.00 | 3.36 | 0.00 | 2.81 | 0.00 |
基因型×年份G×Y | 204 | 3.01 | 0.00 | 3.82 | 0.00 | 6.03 | 0.00 | 2.36 | 0.00 | 2.81 | 0.00 | 17.36 | 0.00 | 2.85 | 0.00 | 3.55 | 0.00 |
基因型×环境×年份G×E×Y | 204 | 3.39 | 0.00 | 3.96 | 0.00 | 15.69 | 0.00 | 3.85 | 0.00 | 3.83 | 0.00 | 70.20 | 0.00 | 31.43 | 0.00 | 5.92 | 0.00 |
变异来源 Variance sources | df | 穗长SL | 穗重PW | 小穗数SN | 穗粒数KSP | 千粒重TGW | 产量Y | 倒伏率LR | |||||||||
F | P | F | P | F | P | F | P | F | P | F | P | F | P | ||||
基因型Genotype(G) | 204 | 10.74 | 0.00 | 19.45 | 0.00 | 10.33 | 0.00 | 25.94 | 0.00 | 73.94 | 0.00 | 3.83 | 0.00 | 1814.24 | 0.00 | ||
年份Year(Y) | 1 | 54.62 | 0.00 | 33.26 | 0.00 | 41.02 | 0.00 | 397.65 | 0.00 | 1529.21 | 0.00 | 961.55 | 0.00 | 60624.73 | 0.00 | ||
环境Environment(E) | 1 | 766.82 | 0.00 | 451.23 | 0.00 | 251.61 | 0.00 | 1018.16 | 0.00 | 828.19 | 0.00 | 15.51 | 0.00 | 49011.26 | 0.00 | ||
基因型×环境G×E | 204 | 2.55 | 0.00 | 4.04 | 0.00 | 4.42 | 0.00 | 4.22 | 0.00 | 33.03 | 0.00 | 2.03 | 0.00 | 690.30 | 0.00 | ||
基因型×年份G×Y | 204 | 3.36 | 0.00 | 4.88 | 0.00 | 3.66 | 0.00 | 4.50 | 0.00 | 30.53 | 0.00 | 2.29 | 0.00 | 510.09 | 0.00 | ||
基因型×环境×年份G×E×Y | 204 | 3.34 | 0.00 | 6.60 | 0.00 | 5.90 | 0.00 | 4.01 | 0.00 | 39.47 | 0.00 | 5.48 | 0.00 | 1450.58 | 0.00 |
表5
青稞15个表型性状相关系数"
性状 Trait | 根数 NOR | 根干重 RDW | 株高 PH | 分蘖数NOT | 重心位置COG | 茎秆壁厚厚 WT | 茎粗 DMS | 茎秆强度 SS | 穗长 SL | 穗重 PW | 小穗数 SN | 穗粒数 KPS | 千粒重 TGW | 产量 Y | 倒伏率 LR |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
根数NOR | 1 | ||||||||||||||
根干重RDW | 0.712** | 1 | |||||||||||||
株高PH | -0.011 | 0.079* | 1 | ||||||||||||
分蘖数NOT | 0.304** | 0.312** | 0.055 | 1 | |||||||||||
重心位置COG | 0.131** | 0.154** | 0.669** | 0.043 | 1 | ||||||||||
茎秆壁厚WT | 0.313** | 0.336** | 0.071* | -0.042 | 0.146** | 1 | |||||||||
茎粗DMS | 0.312** | 0.395** | 0.262** | 0.305** | 0.279** | 0.505** | 1 | ||||||||
茎秆强度SS | 0.428** | 0.533** | 0.042 | 0.076* | 0.261** | 0.494** | 0.423** | 1 | |||||||
穗长SL | 0.236** | 0.248** | 0.001 | 0.026 | 0.154** | 0.293** | 0.134** | 0.407** | 1 | ||||||
穗重PW | 0.231** | 0.264** | -0.097** | -0.168** | 0.082* | 0.330** | 0.278** | 0.493** | 0.528** | 1 | |||||
小穗数SN | 0.200** | 0.235** | -0.111** | 0.009 | 0.104** | 0.277** | 0.241** | 0.401** | 0.680** | 0.664** | 1 | ||||
穗粒数KPS | 0.290** | 0.327** | 0.014 | -0.200** | 0.145** | 0.363** | 0.343** | 0.452** | 0.437** | 0.836** | 0.569** | 1 | |||
千粒重TGW | -0.108** | -0.088* | -0.058 | 0.028 | -0.036 | -0.096** | -0.051 | -0.022 | 0.055 | 0.104** | 0.032 | -0.165** | 1 | ||
产量Y | 0.436** | 0.464** | 0.05 | 0.631** | 0.155** | 0.200** | 0.532** | 0.386** | 0.300** | 0.483** | 0.388** | 0.493** | 0.219** | 1 | |
倒伏率LR | -0.130** | -0.152** | 0.507** | 0.100** | 0.333** | -0.161** | 0.064 | -0.266** | -0.181** | -0.305** | -0.278** | -0.181** | -0.130** | -0.071* | 1 |
表6
青稞种质资源表型性状的主成分分析"
性状Trait | PV1a1i | PV2a2i | PV3a3i | PV4a4i | PV5a5i | PV6a6i | PV7a7i |
---|---|---|---|---|---|---|---|
根数NOR | 0.604 | 0.205 | -0.393 | -0.318 | -0.100 | 0.314 | -0.205 |
根干重RDW (g) | 0.664 | 0.242 | -0.352 | -0.297 | -0.015 | 0.280 | -0.196 |
株高PH (cm) | 0.062 | 0.749 | 0.478 | 0.113 | 0.066 | 0.110 | -0.059 |
分蘖数NOT | 0.208 | 0.472 | -0.683 | 0.286 | -0.211 | -0.065 | 0.269 |
重心位置COG (cm) | 0.275 | 0.623 | 0.487 | 0.123 | 0.089 | 0.275 | -0.046 |
茎秆壁厚WT (mm) | 0.583 | 0.041 | 0.134 | -0.389 | 0.428 | -0.216 | 0.321 |
茎粗DMS (mm) | 0.607 | 0.416 | -0.049 | -0.045 | 0.217 | -0.481 | 0.125 |
茎秆强度SS (N) | 0.750 | 0.012 | 0.022 | -0.200 | 0.260 | 0.162 | 0.027 |
穗长SL (cm) | 0.626 | -0.238 | 0.219 | 0.229 | -0.173 | 0.351 | 0.416 |
穗重PW (g) | 0.758 | -0.39 | 0.268 | 0.184 | -0.063 | -0.138 | -0.248 |
小穗数SN | 0.691 | -0.345 | 0.197 | 0.252 | -0.215 | 0.075 | 0.272 |
穗粒数KPS | 0.753 | -0.234 | 0.332 | -0.026 | -0.231 | -0.247 | -0.323 |
千粒重TGW (g) | -0.008 | -0.141 | -0.172 | 0.691 | 0.603 | 0.165 | -0.178 |
产量Y (kg·hm-2) | 0.710 | 0.210 | -0.371 | 0.421 | -0.111 | -0.225 | -0.129 |
倒伏率LR (%) | -0.267 | 0.666 | 0.296 | 0.140 | -0.268 | -0.119 | -0.011 |
特征值E | 4.786 | 2.337 | 1.754 | 1.318 | 0.945 | 0.874 | 0.739 |
贡献率CR (%) | 31.909 | 15.580 | 11.692 | 8.785 | 6.301 | 5.827 | 4.927 |
累计贡献率CCR (%) | 31.909 | 47.489 | 59.181 | 67.966 | 74.268 | 80.095 | 85.022 |
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