文献类型： 外文期刊

作者： Fan, XM ¹ ; Tan, J ¹ ; Yang, JY ¹ ; Chen, HM ¹ ;

作者机构： 1.Yunnan Acad Agr Sci, Inst Food Crops, Kunming 650205, Yunnan Province, Peoples R China

关键词： quality protein maize;combining ability;simple sequence repeats;heterotic groups

期刊名称：MAYDICA （ 影响因子：0.542； 五年影响因子：0.605 ）

ISSN： 0025-6153

年卷期： 2004 年 49 卷 4 期

页码：

收录情况： SCI

摘要： Information on combining ability and heterotic grouping is important to maize (Zea mays L.) breeders. Ten yellow, quality-protein maize (QPM) inbreds were included in this study, among which five were subtropical, tropical QPM lines introduced from CIMMYT and another five were Chinese elite temperate QPM lines. The combining ability for grain yield of the ten QPM lines was analyzed through evaluating 45 crosses from a diallel in three typical environments. Inbreds CML161, CML166, CML171, and Qi205 had high general combining ability (GCA), and it is possible to get high-yielding crosses by using them as parents. The results from the yields of F1 crosses suggest that lines with high GCA and specific combining ability (SCA), should be selected as parents. Genetic similarities of the ten QPM lines were estimated by Using simple sequence repeat (SSR) markers. 37 polymorphic SSR primers were selected, which detected 105 alleles among the ten tines. The 105 alleles were used to estimate the genetic similarities. On the basis of the SCA effects and the genetic similarity of the 45 crosses, the ten QPM lines were divided into three heterotic groups. It is reasonable to classify the subtropical, tropical and temperate germplasm into different: groups. This study has provided useful information for QPM breeding.