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The qSAC3 locus from indica rice effectively increases amylose content under a variety of conditions

文献类型： 外文期刊

作者： Zhang, Hua 3 ; Zhou, Lihui 1 ; Xu, Heng 3 ; Wang, Liangchao 3 ; Liu, Huijie 3 ; Zhang, Changquan 2 ; Li, Qianfeng 2 ; Gu, 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Jiangsu High Qual Rice Res & Dev Ctr, China Natl Ctr Rice Improvement,Nanjing Branch, Prov Key Lab Agrobiol,Inst Food Crops, Nanjing 210014, Jiangsu, Peoples R China

2.Yangzhou Univ, Coll Agr, Jiangsu Key Lab Crop Genet & Physiol, Key Lab Plant Funct Genom,Minist Educ, Yangzhou 225009, Jiangsu, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, State Key Lab Breeding Base Zhejiang Sustainable, Key Lab Creat Agr,Minist Agr, Hangzhou 310021, Zhejiang, Peoples R China

关键词： Rice quality; Chromosome segment substitution lines; Amylose content; Quantitative trait loci; Environmental effect

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2019 年 19 卷

页码：

收录情况： SCI

摘要： BackgroundAmylose content (AC) is a critical factor for the quality of rice. It is determined by the biosynthesis gene Waxy (Wx) and a variety of quantitative trait loci (QTLs). Although many QTLs have been reported to affect rice AC, few of them have been investigated under varying growth conditions, especially various temperatures, which are known to greatly influence the AC.ResultsWe analyzed the AC at different temperatures and planting seasons in a set of chromosome segment substitution lines (CSSLs) which were derived from a cross between the indica variety 9311 and the japonica variety Nipponbare carrying the same Wx(b) allele. A joint analysis detected a single locus, qSAC3, with a high logarithm of odds (LOD) score in four different conditions. The qSAC3 from indica 9311 (qSAC3(ind)) substantially increased the AC in japonica Nipponbare under all tested growth conditions. Furthermore, introducing the qSAC3(ind) into the soft rice variety Nangeng9108 with Wx(mq), a mutant allele of Wx(b), also moderately increased its AC and improved its appearance quality significantly by reducing the chalkiness of the polished rice.ConclusionsOur results indicate that the qSAC3(ind) could increase the AC of japonica rice in different environments as well as in the background of different Wx alleles and that qSAC3 is a valuable locus for fine-tuning the rice AC and ameliorating the dull endosperm in rice varieties with the Wx(mq) allele.

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