[SSR linkage map construction and QTL mapping for leaf area in maize].
Maize (Zea mays L.) leaf is the main organ for photosynthesis. The area of leaves (especially the ear-leaf and the two leaves above and below the ear-leaf) plays a vital role in dry matter accumulation and grain yield. Therefore, genetic information on leaf area has a theoretical significance for breeding maize with high yield. In this study, a genetic linkage map composing of 184 simple sequence repeat (SSR) markers was constructed based on an F8 recombinant inbred line (RIL) population, which was derived from a cross between 478 and W312. The parents showed a significant difference in leaf area. The map covers 2084.1 cM with an average interval of 11.3 cM. QTLs for leaf area were identified under two-year's field experiments. Totally 7 QTLs were detected in two years, among which 4 QTLs were detected in 2006 and 3 QTLs in 2007. A major QTL on chromosome 2 (between umc1542 and umc1518) were detected in both 2006 and 2007. It explains 12.5% and 17.3% of the phenotypic variation, respectively. This locus can be used as a potental marker for improving maize leaf growth through marker assisted selection (MAS) approach.
Liu
Jian-Chao
JC
Key Laboratory of Plant Nutrition, Ministry of Agriculture/Key Laboratory of Plant-Soil Interactions, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China. ljccau@gmail.com
Chu
Qun
Q
Cai
Hong-Guang
HG
Mi
Guo-Hua
GH
Chen
Fan-Jun
FJ
D002874:Chromosome Mapping; D004777:Environment; D008040:Genetic Linkage; D005819:Genetic Markers; D018598:Minisatellite Repeats; D018515:Plant Leaves / Q000235:genetics*; D040641:Quantitative Trait Loci; D003313:Zea mays / Q000235:genetics*
D005819:Genetic Markers