Evaluation of Brassica napobrassica germplasm resources

In order to efficiently utilize Brassica napobrassia, the genetic diversity of 28 B. napobrassica accessions were assessed by measuring 27 quantitative traits. The results showed that the B. napobrassica had significant genetic differentiation and diversity in 27 quantitative traits. Among those data, the coefficient of variation (CV) of the nutlet was maximum, reaching up to 64.1%, the second was the pair number of lobule with CV of 57%, and the minimum was weight per earthnut with CV of 2.4%. In addition, 28 B. napobrassica accessions were divided into four categories by cluster analysis. The first group included 14 accessions possessingthe characteristics of green cotyledon, small lateral bud and round blade leaf opex, the second group included 2 accessions with the characteristics of smooth leaf surface, no seta on leaf surface, less powder and semi upright leaf cluster, the third group included 6 accessions with the characteristics of medium tillering ability, light green siliqua, white fleshy root, and less fibrous root, the fourth group included 6 accessions with the characteristics of serrated and large corrugated leaf edge, leaf nodule and reddishbrown seed coat.