Phenotypic diversity of rapeseed accessions from different geographic locations

Phenotypic diversity of rapeseed accessions from

different geographic locations

Hongyun TIAN;Wei LI;Vratislav KUCERAC;Michael J.STAMM;Shengwu HU

【期刊名称】《中国油料作物学报（英文）》 【年(卷),期】2016(000)001

【摘要】It is essential to evaluate agronomic and quality traits when using elite lines in rapeseed (Brassica napus L.) breeding.92 rapeseed accessions (44 Chinese,22 European,16 USA and 10 Canadian) were evaluated by 16 agronomic and quality traits in Northern China.Analysis of variance among the 92 accessions revealed significant differences on 13 traits.The 13 traits were plant height,setting position of the first primary

branch,silique

number

(on

terminal

raceme),silique

density,siliques per plant,seeds per silique,thousand seed weight,seed yield per plant,flowering time,final flowering,maturity time,cold mortality,and oil content.Other 3 traits were not significant (primary branches per plant,terminal raceme length and seed protein).Cluster analysis revealed that 92 accessions were clustered into 3 major groups.The 1st group had 10 Canadian and 5 Chinese.The 2nd group had 33 accessions from China and 5 from Europe.The 3rd group had 39 accessions from Europe and the USA.For agronomy and quality traits,45.73％ genetic variation attributed to differences among populations of geographic regions,and 54.27％ attributed to differences