白菜型油菜黄子资源的初步遗传研究

Primary Genetic Evaluation of Yellow-seeded Brassica rapa

对随机选取的国内外22份黄子白菜型油菜和22份褐子白菜型油菜进行了种皮色泽的显隐性关系鉴定、黄子性状的等位性测验以及遗传多样性分析。结果表明,黄子白菜型油菜与褐子白菜型油菜配组的杂交组合中,部分组合的F1种皮色泽呈现父本的种皮色泽,表现出花粉直感现象;自然界中存在多种白菜型油菜黄子类型,鉴定出的3种黄子白菜型油菜与褐色白菜型油菜的F2种皮色泽均为褐色,表明黄子性状对于褐子性状为隐性;分子标记方差分析结果显示,白菜型油菜的生长习性所解释的遗传变异大于种皮颜色所解释的遗传变异,表明国外不同生长习性的黄子白菜型油菜资源可用于国内黄子白菜型油菜遗传基础的拓宽。

Yellow-seeded Brassica rapa was widely used in the breeding program of yellow-seeded rapeseed.The germplasm of B.rapa was evaluated among 22 yellow-seeded and 22 brown-seeded accessions randomly selected from gene bank via allelic test,dominant-recessive investigation and diversity analysis.Seeds in some F1 between yellow-seeded and brown-seeded lines exhibited brown in same with male due to xenia.The trait of yellow seed was recessive relative to brown seed since the color of seeds was brown in F2 between 3 types of yellow-seeded lines and brown-seeded accessions.The results of analysis of molecular variance showed that the habit play more important role in the genetic variance of accessions than seed color.Our data suggest the exotic yellow-seeded accessions can be used to widen Chinese germplasm of yellow-seeded B.rapa.