Combining Ability and Genetic Effects of Germination Traits of Brassica napus L. Under Waterlogging Stress Condition

文献类型： 外文期刊

第一作者： Cheng Yong

作者： Cheng Yong;Cong Ye;Zou Chong-shun;Zhang Xue-kun;Wang Han-zhong;Gu Min

作者机构：

关键词： Brassica napus L.;relative vigor index;waterlogging tolerance;germination trait;combining ability;diallel crossing

期刊名称：AGRICULTURAL SCIENCES IN CHINA （ 影响因子：0.82； 五年影响因子：0.997 ）

ISSN： 1671-2927

年卷期： 2010 年 9 卷 7 期

页码：

收录情况： SCI

摘要： Cross combinations from six rapeseed cultivars and lines were evaluated under waterlogging stress condition in order to understand the genetic mechanism of waterlogging tolerance of Brassica napus L. and provide reasonable improvement programs. There were six germination traits investigated on combining ability and heritability using complete diallel crossing method designed for 30 combinations from those six cultivars and lines. The traits included relative root length, stem length, fresh weight per plant, survival rate, electrical conductivity, and vigor index. After flooding treatment, the six traits of parents and F(1) were analyzed. The general combining ability (GCA) and special combining ability (SCA) of germination traits were analyzed using Griffing I method. Among 30 cross combinations, the GCA was significantly different among six waterlogging resistance traits. The SCA of these traits was significantly different except the SCA of electrical conductivity. As a representative trait of waterlogging tolerance in rapeseed, relative vigor index had the highest narrow heritability and relatively low broad heritability. The cultivars Zhongshuang 9 and P79 had higher tolerance potential to waterlogging stress. It can be concluded that combining ability and genetic effects of relative vigor index during germination stage could be used to identify the waterlogging tolerance of rapeseed in breeding program.

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