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- W2384697257 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 Qinghai,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." @default.
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- W2384697257 date "2012-01-01" @default.
- W2384697257 modified "2023-09-23" @default.
- W2384697257 title "Analysis of phenotypic diversity in Chinese collection of Brassica rapa L." @default.
- W2384697257 hasPublicationYear "2012" @default.
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