浙江省地方豇豆种质资源的鉴定与评价

Evaluation of Cowpea Germplasm Accessions Collected from Zhejiang Province

"第三次全国农作物种质资源普查与收集行动"浙江项目组从全省32个县(市/区)共收集到豇豆地方资源76份。本研究通过对76份种质43个基本农艺性状的田间调查,发现76份种质包括30份长豇豆(Vigna unguiculata(L.)Walp.ssp.sesquipedialis)、46份普通豇豆(Vigna unguiculata(L.)Walp.ssp.unguiculata)。浙江地方豇豆种质在生长习性、嫩荚商品性及产量相关性状均存在丰富的遗传变异。利用101个在染色体上均匀分布的SNP标记对该群体的基因型进行鉴定,主成分分析和系统进化树分析发现这些种质可以依据荚长分为长荚和短荚2大类,长荚类群以长豇豆种质为主,短荚类群以普通豇豆种质为主。本研究进一步丰富了我国豇豆遗传基础,为地方豇豆资源的高效利用和新品种选育提供了科学依据。

As a sub-project under the frame of the Third National-Wide Investigation of Crop Germplasm Resources Project in China,we conducted the survey and collection of 76 cowpea germplasms in 32 counties in Zhejiang province,followed by the morphological diversity analysis at 43 agronomic traits in the field trials.Out of 76 accessions,30 asparagus bean accessions(Vigna unguiculata(L.)Walp.ssp.sesquipedialis)and 46 common cowpea accessions(Vigna unguiculata(L.)Walp.ssp.unguiculata)have been identified.The large genetic variation on the growth habits,fresh pod characters and yield-related traits in this collection have been observed.Moreover,these accessions were subjected for a genotyping with 101 SNP markers.PCA and phylogenetic tree analysis showed two sub-populations(long-podded vs.short-podded)based on the pod length.The asparagus bean accessions are often detected in the long-podded subpopulation,while common cowpea accessions were predominant in the short-podded subpopulation.Collectively,our results unlocked the genetic diversity of Chinese cowpea germplasms collected from Zhejiang province,which might be valuable resources in the exploration of local cowpea resources and in breeding for new cultivars.