Selection of Germplasm With Low Seed Shattering Rate and Evaluation of Agronomic Traits of Stylosanthes

doi:10.11733/j.issn.1007-0435.2022.01.014

Acta Agrestia Sinica ›› 2022, Vol. 30 ›› Issue (1): 108-117.DOI: 10.11733/j.issn.1007-0435.2022.01.014

Selection of Germplasm With Low Seed Shattering Rate and Evaluation of Agronomic Traits of Stylosanthes

ZHANG Jing-xue¹, SHENG Wei¹, LI Xin-yong², LUO Li-juan¹

1. College of Tropical Crops, Hainan University, Haikou, Hainan Province 570228, China;
2. Institute of Tropical Crops Genetic Resources, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan Province 571737, China

Received:2021-06-09 Revised:2021-07-13 Published:2022-01-27

柱花草低落粒种质筛选及农艺性状综合评价

张靖雪¹, 盛伟¹, 李欣勇², 罗丽娟¹

1. 海南大学热带作物学院，海南海口 570228;
2. 中国热带农业科学院热带作物品种资源研究所，海南儋州 571737

通讯作者: 李欣勇, E-mail: lixy05@qq.com;罗丽娟, E-mail: luoljd@126.com
作者简介:张靖雪(1996-)，女，江苏淮安人，硕士研究生，主要从事牧草种质资源研究，E-mail: zhangjx0016@163.com
基金资助:
国家自然科学基金项目(31802125)；海南省自然科学基金项目(320RC721)；海南省院士创新平台科研专项(YSPTZX202020)；滇桂黔石漠化地区特色作物产业发展关键技术集成示范项目资助

Abstract

Abstract: To explore the excellent germplasm resources of Stylosanthes and the breeding of resistant varieties, in this study, 68 Stylosanthes accessions were selected and evaluated by 9 agronomic traits including shattering rate from 2020 to 2021. The principal component analysis, correlation analysis, and cluster analysis were conducted by SPSS 20.0, and the comprehensive evaluation of agronomic traits was carried out by using the subordinate function method. The results showed that among the 9 quantitative traits, the coefficient of variation of the number of main branches was the largest, which was 67.2%. TF0027 showed the best shattering resistance among 68 accessions, while the shattering rate of TF0255 was the highest. Correlative analysis indicated that seed drop rate was positively correlated with leaflet length (P < 0.01), seed drop rate was negatively correlated with stem diameter (P < 0.01), the thousand-grain weight was positively correlated with the stem diameter (P < 0.05), and the thousand-grain weight was negatively correlated with the shattering rate (P < 0.05). The shorter the leaflets were, the larger the stem diameter was, the lower the seed drop rate was, and the higher the seed yield was. Cluster analysis of 9 agronomic traits showed that 68 accessions were clustered into 5 groups. The subordinate function analysis showed TF0275 had the best comprehensive performance with a subordinate function value of 0.627. This study laid the foundation for accelerating the innovation of Stylosanthes germplasm and the breeding of resistant varieties.

Key words: Stylosanthes guianensis, Germplasm resources, Seed shattering, Agronomic traits

摘要： 为发掘柱花草(Stylosanthes guianensis)优异种质资源及其抗落粒品种选育，本研究以68份柱花草种质为试验材料，在2020—2021年间对落粒率等共9项农艺性状进行田间观测，采用SPSS 20.0数据分析软件对观测数据进行主成分、相关性和聚类分析，并运用隶属函数法对农艺性状进行综合评价。结果表明：9个农艺性状中主枝条数的变异系数最大，为67.2%。68份种质中，TF0027落粒率最低；TF0255落粒率最高；相关性分析显示，落粒率与小叶长呈极显著正相关(P < 0.01)，与茎粗呈极显著负相关(P < 0.01)；千粒重与茎粗呈显著正相关(P < 0.05)，与落粒率呈显著负相关(P < 0.05)，表明小叶越短，茎粗越大，落粒率越低，种子千粒重也越大。对9项农艺性状的聚类分析结果显示，68份种质被聚为5类。隶属函数分析表明，TF0275综合性状表现最优，各性状隶属函数均值为0.627。本研究为加快柱花草种质创新及抗落粒品种选育奠定了基础。

关键词: 柱花草, 种质资源, 落粒性, 农艺性状

CLC Number:

S541+.9

ZHANG Jing-xue, SHENG Wei, LI Xin-yong, LUO Li-juan. Selection of Germplasm With Low Seed Shattering Rate and Evaluation of Agronomic Traits of Stylosanthes[J]. Acta Agrestia Sinica, 2022, 30(1): 108-117.

张靖雪, 盛伟, 李欣勇, 罗丽娟. 柱花草低落粒种质筛选及农艺性状综合评价[J]. 草地学报, 2022, 30(1): 108-117.

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Selection of Germplasm With Low Seed Shattering Rate and Evaluation of Agronomic Traits of Stylosanthes

柱花草低落粒种质筛选及农艺性状综合评价

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