冀豆12遗传背景导入系蛋白、脂肪含量分布特征

以高蛋白品种冀豆12为受体亲本,不同来源、不同蛋白脂肪含量的大豆种质资源为供体亲本,构建了28个组合BC2F1后代群体,分析冀豆12遗传背景导入系后代蛋白、脂肪含量分布特征。结果表明,28个后代群体均有蛋白含量超高亲个体,超高亲个体比例介于4.0%～68.2%之间,超高亲比例≥40%的组合有18个,占64.3%,BC2F1后代群体蛋白含量以超高亲和偏高亲类型组合为主。而脂肪含量分布特征恰相反,BC2F1后代群体脂肪含量以超低亲和偏低亲类型组合为主,超高亲个体比例介于0～67.4%,超高亲个体比例≥40%的组合有7个,占25.0%,9个组合无超高亲后代。表明以冀豆12为遗传背景通过有限回交易选育高蛋白含量品种,而不易选育高脂肪含量品种。本研究结果为利用冀豆12培育高蛋白品种提供了依据。

The Character of Protein and Oil Content Distribution among Introgression Lines Using Jidou12 as Recipient Parent

High protein content variety Jidou12 was used as recipient panrent to backcross to 28 soybean germplasm with different geography origine and protein or oil content.The characters of protein and oil content distribution among all these BC2F1 introgression lines were analysed.The results showed that high protein content individuals were found among all of the 28 populations,and the proportion of individuals that over higher protein parent was between 4.0% and 68.2%.Among these,the proportion of 18 populations have exceeded 40%.In general,the higher protein content combinations are mainly in BC2F1 introgression lines.On the contrary,the character of oil content distribution was not similar,and the proportion of individuals that over higher oil parent was between 0 and 67.4%,and only 7 populations have surpassed 40%.There also exist 9 populations that no individuals over higher oil parent.Therefore,lower oil content combinations are largely in the BC2F1 populations.This work indicated that it was easier to produce high protent content progeny than to produce high oil content progeny using introgression linse with Jidou12 genetic background.