1. Detection of soybean protein content QTL with BC2 backcross population.
- Author
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CHEN Ming-yang, ZHANG Jin-wei, HAN Fen-xia, SUN Jun-ming, ZOU Xiao, YAN Shu-rong, YANG Hua, ZHANG Jing-ying, TIAN Ling, and NAN Jin-ping
- Subjects
SOY proteins ,PLANT populations ,PLANT genetics ,PLANT breeding ,BIOMARKERS ,PLANTS ,CULTIVARS - Abstract
Seed protein content, controlled by quantitative genes, is a very important trait for soybean. To idenlify the soybean quantitative trait loci (QTL) of seed protein content, which provides a base for MAS breeding and elite genes - discovering, a cross was made between the elite cultivar Zhonghuang 13, which exhibits a comprehensive excellent performance and has the higher protein content and the variety Dongshan 69 which has the lower protein content. The BC
2 F2 and BC2 F3 backcross populations were further developed to identify protein composite interval mapping (ICIM), two QTLs flanked by the marker interval Satt396 to Satt180 and Sct_001 to Satt654 were both detecled in the BC2F2 and BC2F3 families. In the BC2 F2 families, 3 QTLs were found on A1, C1 and J linkage groups, which accounted for 10.00%, 7.07% and 9.23% phenotypic variance, respectively. In the BC2 F3 families, 4 QTLs were identified on B1, C1, I and J linkage groups, which explained 17. 57%, 3. 46%, 8. 53% and 11. 80% phenotypic variance, respectively. Region Sct_001 to Satt654 may be a new interval associated wilh protein content QTL. [ABSTRACT FROM AUTHOR]- Published
- 2013
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