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2010•Acta Agriculturae Boreali-SinicaRequires access

QTL Mapping and Epistasis Analysis of Flowering Related Traits in Maize

WU Jian-yu

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Abstract

Genetic studies of flowering related traits are important in maize breeding,in this study,a recombinant inbred line(RIL)population derived from the cross between N6 and BT-1 was used for flowering related traits evaluation;a genetic linkage map with 207 SSR markers was constructed for quantitative trait loci(QTL)mapping.The results indicated that stable additive QTL conferring flowering related traits,including days to tasseling,days to silking and days to anthesis were identified on chromosomes 1(bin 1.05-1.06)and 2(bin 2.02)in two environments.For QTL with epistatic effects,3 pairs of epistatic QTL were detected for days to tasseling,days to silking and days to anthesis,respectively,which can account for 3.78%-5.43%,1.24%-2.36% and 3.27%-4.04% phenotypic variation.Epistatic QTL are the important genetic basis for flowering related traits in maize.

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Genetic studies of flowering related traits are important in maize breeding,in this study,a recombinant inbred line(RIL)population derived from the cross between N6 and BT-1 was used for flowering related traits evaluation;a genetic linkage map with 207 SSR markers was constructed for quantitative trait loci(QTL)mapping.The results indicated that stable additive QTL conferring flowering related traits,including days to tasseling,days to silking and days to anthesis were identified on chromosomes 1(bin 1.05-1.06)and 2(bin 2.02)in two environments.For QTL with epistatic effects,3 pairs of epistatic QTL were detected for days to tasseling,days to silking and days to anthesis,respectively,which can account for 3.78%-5.43%,1.24%-2.36% and 3.27%-4.04% phenotypic variation.Epistatic QTL are the important genetic basis for flowering related traits in maize.

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Available abstract

Genetic studies of flowering related traits are important in maize breeding,in this study,a recombinant inbred line(RIL)population derived from the cross between N6 and BT-1 was used for flowering related traits evaluation;a genetic linkage map with 207 SSR markers was constructed for quantitative trait loci(QTL)mapping.The results indicated that stable additive QTL conferring flowering related traits,including days to tasseling,days to silking and days to anthesis were identified on chromosomes 1(bin 1.05-1.06)and 2(bin 2.02)in two environments.For QTL with epistatic effects,3 pairs of epistatic QTL were detected for days to tasseling,days to silking and days to anthesis,respectively,which can account for 3.78%-5.43%,1.24%-2.36% and 3.27%-4.04% phenotypic variation.Epistatic QTL are the important genetic basis for flowering related traits in maize.

Key concepts: Quantitative trait locus, Epistasis, Biology, Anthesis, Inbred strain, Population, Genetic linkage, Inclusive composite interval mapping

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