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69份穇子地方种质资源表型多样性评价
李基光1, 王艳兰1, 向兰舟1, 邓 晶2, 朱建宇1, 王利群1, 汤 睿1, 余应弘2
0
(1湖南省农业科学院作物研究所,长沙 410125;2湖南省农业科学院,长沙 410125)
摘要:
本研究对从湖南、江西、广西以及西藏40个县市收集的69份穇子种质资源进行表型多样性评价。结果表明,收集到的69份地方资源主要分布于200-600 m的中低海拔地区。19项农艺性状表型分析显示其遗传多样性丰富;主成分分析将19个农艺性状分为7个主成分,其主要与单株草重、主穗分枝数、叶色、生育期、粒色、千粒重、米粳糯相关,累计贡献率75.525%;聚类分析将69份资源分为2大类群,第Ⅰ类群包括44份种质,株型小、生物量小、产量较低;第Ⅰ类群又分为2个亚群,相比与类群Ⅰ-1,类群Ⅰ-2株型、生物量更小,产量更低。第Ⅱ类群包括25份种质,株型大、生物量大、产量较高;第Ⅱ类群又可以分为2个亚群,与类群Ⅱ-1相比类群Ⅱ-2生物量相对较小,产量较低。根据聚类分析结果及数量性状极值和质量性状变异类型提取出12份穇子特异种质,并从中筛选出4类可以代表类群特征的资源:生物量大适合作饲草的资源,长穗型优质资源,糯性优质资源,高产、高生物量的粮饲两用资源。
关键词:  穇子  鉴定评价  种质资源  
DOI:10.13430/j.cnki.jpgr. 20210406001
投稿时间:2021-04-06修订日期:2021-05-11
基金项目:湖南省自科基金面上项目(2020JJ4422);国家农作物种质资源库(NCGRC-2020-56);湖南省创新平台与人才计划项目(2020NK4258);湖南省农业科技创新资金项目(2020CX28);湖南省农作物种质资源创新平台
Evaluation of Phenotypic Diversity of 69 Finger Millet Germplasms
LI Ji-guang1, WANG Yan-lan1, XIANG Lan-zhou1, DENG Jing2, ZHU Jian-yu1, WANG Li-qun1, TANG Rui1, YU Ying-hong2
(1Crop Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125; 2Hunan Academy of Agricultural Sciences, Changsha 410125)
Abstract:
The phenotypic diversity of 69 finger millet germplasms collected from 40 counties and cities in Hunan, Jiangxi, Guangxi and Tibet was evaluated in the study. The results showed that the 69 local resources were mainly distributed in the low and medium altitude of 400-600 m. The diversity analysis based on 19 phenotypic traits revealed a rich genetic diversity in this collection. The correlation analysis and principal component analysis suggested 7 principal components including weight per plant, number of branches on main spike, leaf color, whole growth period, seed coat color, 1000-grain weight and glutinousness. The cumulative contribution rate was 75.525%. Two main categories were suggested for the 69 accessions. The first group included 44 germplasms with small plant, low biomass and low grain yield, and was further divided into two subgroups: compared with subgroup I-1, subgroup I-2 had even smaller plant, lower biomass and lower grain yield. The second group included 25 germplasms with relatively large plant, high biomass and high grain yield, and was further divided into two subgroups: compared with subgroup II-1, subgroup II-2 had lower biomass and lower grain yield. A core collection containing 12 finger millet accessions were identified, by cluster analysis results and extreme-values of quantitative traits and variation types of qualitative traits, as representative resources of the following four types: forage accessions with large biomass, grain accessions with long spikes, glutinous grain accessions, and dual-purpose grain and forage accessions with high grain yield and high biomass.
Key words:  finger millet  appraisal  germplasm resources  

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