中国油料作物学报2012，Vol.34Issue(1)：25-32,8.
中国白菜型油菜种质表型多样性分析
Analysis of phenotypic diversity in Chinese collection of Brassica rapa L
摘要
Abstract
According to their geographic regions, phenotypic traits group and proportion of sample, a collection of 244 Brassica rapa landraces was selected from 1 962 B. Rapa germplasm in oilcrops middle - term genebank of China. 13 phenotypic traits were evaluated to investigate the variation degree of these resources. Results indicated that winter - type accessions from Shanxi province had longer growth periods, while spring - types from Qing-hai, Gansu and Inner - Mongolia provinces had shorter growth periods. Semi - winter - types from Sichuan and Yunnan provinces had more pods per plant, and those from Sichuan province had higher plant height also. Spring - types from Tibet had larger seed size. Chinese B. Rapa landraces possessed abundant morphological polymorphism with higher average diversity index ( as 1. 709 ) than that of alien germplasm ( as 1. 250). Genetic diversity of different ecotypes showed that semi - winter - type had the richest diversity, and then followed by the spring - type and the winter accessions. UPMGA (unweighted pair group method with arithmetic mean) results showed that 244 representative B. Rapa landraces could be classified into 4 groups (I, II, III and IV) with a genetic similarity coefficient as 0.204. The 4 groups involved 117,38,34, and 55 landraces, respectively. The group I, II, III and IV were mainly consisted of semi - winter ecotype, spring ecotype, spring ecotype and winter ecotype, respectively. Based on principal coordinates analyses, 244 landraces were separated into 3 gene pools including spring, semi -winter and winter resources, which were consistent with UPGMA result.关键词
白菜型油菜/种质资源/表型性状/地方品种/多样性Key words
Brassica rapa L. / Germplasm resources/ Phenotypic traits/ Landraces/ Diversity分类
农业科技引用本文复制引用
陈碧云,许鲲,高桂珍,闫贵欣,李俊,伍晓明..中国白菜型油菜种质表型多样性分析[J].中国油料作物学报,2012,34(1):25-32,8.基金项目
农业部重点项目 （）
国家公益性科研院所专项资金(1610172009001) （1610172009001）
