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    • Keywords


      rice; 1000-grain weight; percentage of grains with chalkiness; correlations; quantitative trait loci.

    • Abstract


      The study of 1000-grain weight (TGW) and percentage of grains with chalkiness (PGWC) is very important in rice. In this study, a set of introgression lines (ILs), derived from Sasanishiki/Habataki with Sasanishiki as the recurrent parent, were used to detect correlations and quantitative trait loci (QTL) on TGW and PGWC in two different environments. Phenotypic correlation analysis showed that there was no significant correlation between TGW and PGWC in both environments, which indicated that the linkage of TGW and PGWC traits could be broken via suitable population. A total of 20 QTL were detected in both environments, nine QTL for 1000-paddy-grain weight (PTGW), five QTL for 1000-brown-grain weight (BTGW) and six QTL for percentage of grains with chalkiness (PGWC). Moreover, five QTL, qPTGW3, qPTGW8.2, qPTGW11.1 for PTGW and qPGWC1.1, qPGWC1.2 for PGWC, were stably expressed in both environments. Phenotypic values were significantly different ($P \lt 0.01$) between the introgression lines carrying these five QTL alleles and the genetic background parent, Sasanishiki. The introgression lines carrying these QTL also represent a useful genetic resource in the context of rice yield and quality improvement via a design-breeding approach.

    • Author Affiliations


      Jian-Min Bian1 Huan Shi1 Cui-Juan Li1 Chang-Lan Zhu1 Qiu-Ying Yu1 Xiao-Song Peng1 Jun-Ru Fu1 Xiao-Peng He1 Xiao-Rong Chen1 Li-Fang Hu1 Lin-Juan Ouyang1 Hao-Hua He1

      1. College of Agronomy, Jiangxi Agricultural University/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, The People’s Republic of China, Nanchang 330045, People’s Republic of China
    • Dates

  • Journal of Genetics | News

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      Posted on July 25, 2019

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