芝麻次级核心样品表型变异和相关性(英文)

在中国,杭州,浙江大学华家池校区农场,对来自中国和西非贝宁不同生态型的70份芝麻核心样品的22个形态学性状进行评价.应用多元和主成分分析揭示其遗传多样性并将其分为8个聚类组.结果表明,主成分可解释45.2%的变异.尽管地理起源与遗传多样性没有密切相关,但利用形态标记进行聚类分析,可将非洲贝宁2个品种分为聚类Ⅲ,杭州6个品种分为聚类Ⅷ,中国东北和西北品种分为聚类Ⅴ.

Phenotypic variation and relationships among sesame (Sesamum indicum L.) sub-core collections

A total of 70 accessions/ecotypes including 50 accessions from the sesame core collection of China and 7 collected in Benin (West Africa) were evaluated for 22 morphological traits, at Zhejiang University, Huajiachi campus, Hangzhou (China). Multivariate and principal component analyses revealed considerable genetic diversity in the material and led to their grouping into 8 clusters. The first two principal components explained 45.2% of the variation. There was no strong relationship between geographic origin and genetic diversity. Seed exchange over short distances and influence of microenvironments may have taken place. Nonetheless, using morphological markers it was possible to group 2 accessions (INRAB-S42 and INRAB-38-1-7) from Benin in cluster Ⅲ, the 6 accessions from Hangzhou (Zhejiang) in cluser Ⅷ; cluster V was formed by accessions from North-East and North-West of China.