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KMID : 0613820040140050821
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Journal of Life Science
2004 Volume.14 No. 5 p.821 ~ p.828
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Identification of Quantitative Trait Loci Associated with Leaf Length, Width and Length/width Ratio in Two Recombinant Inbred Lines of Soybean (Glycine max L)
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Kim Hyeun-Kyeung
Kang Sung-Taeg
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Abstract
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The increasing apparent photosynthetic rate per leaf area may improve seed yield in soybean. Leaf area, length and width are related to the photosynthetic capability of the plant. In this study, two populations derived from the cross of Keunolkong, Shinpaldalkong and Iksan10 were evaluated with simple sequence repeat (SSR) markers to identify length, width and length/width ratio of leaf. Leaf length/width ratio were significantly negative correlation with leaf width in K/S and K/I populations. In the K/S population, two minor QTLs for leaf length (LL) were found on LG D1b+W and L. Two QTLs on LG J and L were related to LL in K/I population. Two and three minor QTLs were identified in leaf width with total phenotypic variation of 13% and 18.04 in K/S and K/I populations, respectively. The leaf length/width ratio, two QTLs on LG I and L, and three QTLs on LG C1, E and L were related to K/S and K/I populations, respectively. Thus it is assumed that the leaf traits are very much dependent on the genotype used and different breeding approach should be considered for the selection of favorite leaf traits in soybean breeding programs.
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KEYWORD
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QTLs, SSR marker, leaf length, leaf width, leaf length/width ratio, soybean
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