Title: Dissection of QTLs in Two Years for Yield Component Traits in Rice (Oryza sativa)
Abstract: QTLs for six traits including number of spikelets per panicle, number of filled grains per panicle, seed setting rate, number of panicles per plant, 1000-grain weight and grain yield per plant were identified in 2005 and 2006 using a set of 111 recombinant inbred line (RIL) population derived from Nikken 2 and Milyang 23 through consecutive selfing for six or seven generations. A total of 19 QTLs distributed on seven chromosomes were detected, including 10 QTLs in 2005 and 14 QTLs in 2006, and five QTLs in both 2005 and 2006. Some QTLs controlling different traits shared the same marker interval on the chromosome with each other, which was consistent with their significant phenotypic correlations. Three pleiotropic or tightly linked QTL regions controlling yield and its component traits were identified. The QTLs on chromosome 8 (between markers RM5556 and RM331) were found to be the co-localized regions for number of spikelets per panicle, number of filled grains per panicle and grain yield per plant in the two years. These QTLs provide useful information for high-yield rice breeding through marker-assisted selection.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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