Recurrent Selection for Improving Quality Characters of Male Sterile Restorer Lines of Brassica napus  

轮回选择法改良甘蓝型油菜核不育系恢复系群体品质(英文)

作　　者：沈奇[1] 秦信蓉[1] 向阳[1] 赵跃[1] 杜才富[1] 

机构地区：[1]贵州省油菜研究所,贵州贵阳550008

出　　处：《Agricultural Science & Technology》2013年第5期763-766,共4页农业科学与技术（英文版）

基　　金：Supported by Science and Technology Fund of Guizhou Province[(2010)2089];Fund of Engineering Research Center of Guizhou Province[(2012)4006];Fund from Guizhou Academy of Agricultural Sciences[(2011)017]~~

摘　　要：[Objective] This study aimed to improve the quality characters of the male sterile restorer lines of Brassica napus by recurrent selection. [Method] The dominant male sterile alleles were used as outcross medium to be transformed with the favourable genes from thirteen materials, and finally excellent restorer materials were bred by recurrent selection. After that, the genetic diversity, genetic gains, fatty acid chain length and unsaturarion ratios of the improved populations were analyzed. [Result] The genetic diversity and genetic gains were obviously improved by the recurrent selection. Nine materials whose oil content exceeding 50% and 14 materials whose protein content exceeding 30% were acquired, and crossed with sterile lines. The comparative experiment showed that there were 11 combinations whose oil content was obviously enhanced compared with the control. [Conclusion] Recurrent selection is an effective way to improve the quality characters of the objective pop- ulations and breed favourable male sterile restorer lines of B. napus.[目的]用轮回选择法对甘蓝型油菜核不育两系恢复系的品质性状进行改良。[方法]利用显性核不育系作为轮回选择的异交媒介,导入13份常规材料的优良基因,结合自交选择改良群体的品质性状,优选恢复系材料。并对改良群体的遗传多样性、遗传增益、脂肪酸链长度及不饱和度进行分析。[结果]轮回选择方法有效改良群体材料的遗传多样性及遗传增益。通过轮回选择筛选获得9份含油量超过50%和14份蛋白含量超过30%的材料。部分材料与成熟的不育系杂交进行组合比较实验,获得11个含油量显著高于对照的组合。[结论]轮回选择是改良甘蓝型油菜核不育系恢复系群体品质的一个有效的育种方法。

关 键 词：Brassica napus Recurrent selection Male sterile lines Population improvement 

分 类 号：S565.4[农业科学—作物学]