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《Molecular Plant Breeding》 2018-10
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QTL Analysis of Tassel Branch Number and Total Tassel Length in Maize Under Different Environments

Liu Junxia;He Xiaojuan;Liu Tingting;Agricultural Technology Extension Center of Longxi County;The People's Government of Caizi Town,Longxi County;Institute of Crop, Gansu Academy of Agricultural Sciences;  
The rational tassel structure is an important agronomic trait in the process of coordinating the development of female and male ears, and further increasing the yield in maize(Zea mays L.). In this study, we evaluated230 F_(2:3) family lines derived from Ye488 ×Va35-2 to identify and analyze QTLs effects for tassel branch number(TBN) and total tassel length(TTL) with composite interval mapping(CIM) under two different environments.The results showed that in a single environment, 7 QTLs for TBN and 8 QTLs for TTL were detected in F2:3 family at1, 2, 3, 4, 5, 6, 7, 9 and 10 chromosomes and the phenotypic contribution rate of single QTL was 3.38%~17.01%.With 8 stable QTLs(s QTLs) were commonly identified under 2 environments(including 4 s QTLs for TBN: 3.04 bin(qTBN-Ch.3-1), 5.04 bin(qTBN-Ch.5-1), 7.02 bin(qTBN-Ch.7-1), 9.01-9.02 bin(qTBN-Ch.9-1), and4 s QTLs for TTL: 2.05 bin(qTTL-Ch.2-1), 3.04 bin(qTTL-Ch.3-2), 9.01-9.02 bin(qTTL-Ch.9-1), 10.01 bin(qTTL-Ch.10-1)). These s QTLs which were stable in different environments could provide valuable reference for the production, application, precision mapping and positional gene cloning of the tassel related traits in maize.
【Fund】: 国家自然基金项目(31660368)资助
【CateGory Index】: S513
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