QTL Analysis of Ear Traits Based on BC2F2 Population in Maize(Zea may L.)

doi:10.7668/hbnxb.2010.04.016

Abstract

Abstract: The mapping population derived from a cross of Nongxi 110 as receptor and Nongxi 531 as donor，including 95 BC₂F₂ individuals，was developed by back cross breeding program in maize (Zea may L.) . The 126 polymorphic SSR primer pairs between parents，uniformly covering the whole genome，were used for genotyping of 95 BC₂F₂ individuals. The correlation and OTL analysis for ear traits were performed in this mapping population. The correlative result indicated that there is a significant positive correlation between ear length，ear row number of grain，row kernel number and ear weight，a significant positive correlation between ear length and row kernel number，but a significant negative correlation between ear length and ear diameter. According to CIM mapping method，the total 19 QTL for 6 ear traits were identified and located on in the chromosomes which included 4 QTL for ear length，2 QTL for ear diameter，1 QTL for row kernel number，3 QTL for ear row number，4 QTL for hundred kernel weight，5 QTL for ear kernel weight.

Key words: Maize, Quantitative trait loci (QTL), Ear trait, Mapping population

CLC Number:

S13.03

HU Li-zong, LIU Jun-ge, GUO Jin-jie, ZHAO Yong-feng, ZHU Li-ying, SONG Zhan-quan, CHEN Jing-tang. QTL Analysis of Ear Traits Based on BC2F2 Population in Maize(Zea may L.)[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(4): 73-77. doi: 10.7668/hbnxb.2010.04.016.

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