Chinese Journal OF Rice Science

Chinese Journal OF Rice Science >

2010 , Vol. 24 >Issue 2: 137 - 144

DOI: https://doi.org/10.3969/j.issn.1001-7216.2010.02.06

研究报告

Analysis of QTLs for Starch RVA Profile Properties in the Superior Rice Cultivar Koshihikari

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  • 1State Key Laboratory of Crop Genetics and Germplasm Enhancement/Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing 210095, China; 2Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; *Corresponding author, E-mail: wanjm@njau.edu.cn

Received date: 1900-01-01

  Revised date: 1900-01-01

  Online published: 2010-03-10

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Abstract

Additive QTLs, epistatic QTLs and expression stability of QTLs for rice starch RVA profile properties were analyzed using Nanjing 11/Koshihikari RIL population in Nanjing in 2006 and 2007. The studied RVA profile properties involved peak viscosity (PKV), trough paste viscosity (TPV), final paste viscosity (FPV), breakdown viscosity (BDV), setback viscosity (SBV), peak time (PKT) and pasting temperature (PT). The normal distribution and transgressive segregation were observed in the seven RVA profile characteristics of the RIL population in two years. Eight additive QTLs were detected for 6 RVA profile characteristics, and 6 QTLs with main effect (qTPV6， qFPV6， qBDV6， qSBV6， qPKT6 and qPT6) were repeatedly detected in two years, which controlled trough paste viscosity, final paste viscosity, breakdown viscosity, setback viscosity, peak time and pasting temperature, with average contribution rates of 46.4%，60.3%，31.1%，71.9%，38.5% and 12.4%, respectively. qSBV8 and qPT5 were detected in one environment, indicating that these two QTLs were easy to be influenced by environments. Otherwise, five QTLs with epistatic effects with little contribution rate were detected in the same chromosome or between different chromosomes, which were little affected by environments. The QTL analysis for RVA profile properties in rice could lay the foundation for utilization of superior cooking and eating quality related genes in Koshihikari in molecular breeding.

Key words： rice; starch viscosity profile; quantitative trait locus; additive effect; epistatic effect; expression stability

Cite this article

ZHANG Yongsheng,JIANG Ling,LIU Xi,LIU Shijia,CHEN Liangming,ZHAI Huqu,WAN Jianmin . Analysis of QTLs for Starch RVA Profile Properties in the Superior Rice Cultivar Koshihikari[J]. Chinese Journal OF Rice Science, 2010 , 24(2) : 137 -144 . DOI: 10.3969/j.issn.1001-7216.2010.02.06

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