Breeding potential of maize germplasm populations to improve yield and predominant heterotic pattern in Northeast China

文献类型： 外文期刊

第一作者： Yong, Hongjun

作者： Yong, Hongjun;Zhang, Fangjun;Zhang, Xiaocong;Zhang, Degui;Li, Mingshun;Weng, Jianfeng;Hao, Zhuanfang;Zhang, Shihuang;Li, Xinhai;Jin, Zhenguo;Gao, Li;Zhang, Lin;Liu, Xianjun

作者机构：

关键词： Maize germplasm;Population;Favorable allele;Heterotic pattern;Breeding potential

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

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收录情况： SCI

摘要： Increasing the frequency of favorable alleles in elite germplasm is necessary for germplasm improvement and innovation in maize (Zea mays L.) breeding programs. Jidan27 (Si287 x Si144), an elite commercial single cross hybrid that represents the predominant heterotic pattern Chinese Sipingtou x Stiff Stalk Synthetic, has been widely cultivated in the Northeast China Corn Belt. However, the use of the hybrid Jidan27 has been hampered gradually due to its low yield potential, lack of resistance to lodging, and considerable incidence of head smut disease. Previous studies have evaluated yield potential of exotic populations, but few have considered using these germplasms as donors with favorable alleles to overcome these deficiencies in the hybrid Jidan27. In the present study, 12 exotic populations from CIMMYT and the U.S. and three semi-exotic populations were investigated as sources of favorable alleles to increase yield and lodging resistance, and reducing head smut susceptibility of the hybrid Jidan27. The performance of a set of 30 inbred x populations crosses, the hybrid Jidan27, and the two parental inbred lines Si287 and Si144 was evaluated in three locations for 2 years. Two populations, BS10(FR)C10 and Pop43, were identified as the best donors of favorable alleles lacking in the hybrid for improving the target traits. Further, BS13(S)C7 and Cpop.16 were also found to be better choices for improving grain yield and head smut resistance of the hybrid. These results suggest that the elite exotic germplasms evaluated here could provide useful genetic variability to improve other Chinese Sipingtou x Stiff Stalk Synthetic crosses related to Si287 x Si144 that are widely grown in Northeast China.

分类号： S3

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