Quantitative Trait Loci Associated with Fruit Length and Stalk Length in Cucumber Using RIL Population
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    Abstract:

    A 160 recombinant inbred lines(RILs) were derived from a cross between ‘PI183967’and a cultivated Northern Chinese inbred line‘931’.The constructed genetic map and phenotypic data in different seasons were used to identify the quantitative trait loci(QTL) associated with fruit length(Fl) and stalk length(Fsl).Results showed that:(1)8 QTLs related to Fl and Fsl were located on Chr.3,4,5,6 and 7 with LOD between 2.78 and 10.24,which explained 7.4%-32.7% of the phenotypic variation.Of those QTLs,there were 4 QTLs which explained over 10% phenotypic variation and 4 QTLs which could be detected in different seasons.(2)4 QTLs(Fl3.1,Fl4.1,Fl5.1,Fl6.1) associated with fruit length and 4 QTLs(Fsl3.1,Fsl 5.1,Fsl6.1,Fsl7.1) associated with stalk length.(3)Fl6.1 and Fsl6.1 could be detected in 2012,2013 spring and autumn which located on 109.2 cM of chromosome 6 between SSR17591 and C80.The range of phenotypic variation of Fl6.1 was 13.8%-32.7% and Fsl6.1 was 12.1%-24.1%.(4)Fl3.1 and Fsl3.2 were located between SSR16152 and SSR07706.The QTL of Fl3.1 was detected in 2012 autumn and 2013 spring and autumn,explaining 25.1% of the phenotypic variation in all,while Fsl3.2 was just detected in 2012 autumn,which explained 8.8% of the phenotypic variation.Therefore,the region of SSR17591-C80 on Chr.6 and SSR16152-SSR07706 on Chr.3 were major regions which controlled fruit length and stalk length.The two regions should been put key location for the future research on fruit length and stalk length.

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WANG Min, LIU Shulin, ZHANG Shengping, MIAO Han, WANG Ye, TIAN Guili, LU Hongwei, GU Xingfang. Quantitative Trait Loci Associated with Fruit Length and Stalk Length in Cucumber Using RIL Population[J]. Acta Botanica Boreali-Occidentalia Sinica,2014,34(9):1764-1770

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  • Online: October 15,2014
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