1. QTL mapping for controlling anthesis-silking interval based on RIL population in maize
- Author
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Zuping Zheng, Zhenbo Tan, Yangchun Luo, Guoqing Zhang, Chuan He, Zhong Li, Daihui Liu, and Xiaohong Liu
- Subjects
Genetics ,education.field_of_study ,fungi ,Population ,food and beverages ,Quantitative trait locus ,Biology ,Applied Microbiology and Biotechnology ,Agronomy ,Anthesis ,Inbred strain ,Chromosome 3 ,Gene mapping ,Genetic distance ,Genetic marker ,education ,Agronomy and Crop Science ,Molecular Biology ,Biotechnology ,Maize (Zea mays L.), recombinant inbred line (RIL), quantitative trait locus (QTL), anthesis-silking interval (ASI), nitrogen environment - Abstract
Nitrogen (N) deficiency will severely affect many metabolic pathways and physiological progresses during maize ( Zea mays L.) growth and change of anthesis-silking interval (ASI) is one of the most serious consequences. To realize the genetic basis of ASI, a recombinant inbred line (RIL) population consisting of 239 RILs, derived from the cross between Mo17 and Huangzao4, was used to identify the quantitative trait loci (QTLs) controlling ASI under different N environments. As a result, 6 QTLs were detected under high N environment on chromosome 3, 6, 7 and 8 and could explain total 53.67% of phenotypic variance. While, under low N environment, only 3 QTLs were identified on chromosome 6, 7 and 8, and they could account for total 31.87% of phenotypic variance. The two QTLs Qasihn6-1 and Qasihn3-1 , identified under high N environment, were quite near to their linked marker Phi077 and Bnlg197, respectively, with less than 1 cM of genetic distance. These results are beneficial for understanding the genetic basis of ASI in maize.
- Published
- 2012