Analysis of Inheritance and QTLs of Rice Starch Viscosity (RVA Profile) Characteristics
Analysis of Inheritance and QTLs of Rice Starch Viscosity (RVA Profile) Characteristics
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发表时间：
2007
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通讯作者：
Wang Cai-lin
中科院分区：
文献类型：
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作者：
Wang Cai-lin
大米淀粉粘度(RVA谱)特性已被证明可用于评价水稻育种中食味和蒸煮品质。为了研究RVA谱的遗传，以武玉粳3号/爱知106为F2群体。结果表明，峰值粘度(PKV)是典型的定量性状；热糊粘度(HPV)、冷糊粘度(CPV)、挫折粘度(SBV)、击穿粘度(BDV)、稠度粘度(CSV)可能由一个主基因和多个小基因控制;峰值时间(PeT)可能由两个主基因和几个小基因控制。为了解糊粘度特性的遗传基础,利用日建2/密阳23重组自交系群体及其遗传连锁图谱,对2005年和2006年控制RVA谱的QTL进行了定位。结果显示,共有34个QTL分布在染色体上。 2005年和2006年分别发现1、2、3、4、6、7和8个QTL，其中2005年和2006年分别发现19个和15个QTL；两年均发现8个QTL，qHPV6、qCPV6、qCSV6、qSBV6、qBDV6位于6号染色体上，qHPV2、qCSV2、qCPV2位于染色体上2.2号染色体上参与支链淀粉合成的基因与RVA谱有很大关系。
The rice starch viscosity(RVA profile)characteristics has been proved useful for the evaluation of eating and cooking quality in rice breeding program.To study the inheritance of the RVA profile,an F2 population of Wuyujing 3/Aichi 106 was used.The results indicated that peak viscosity(PKV)was a typical quantitative character;hot paste viscosity(HPV),cool paste viscosity(CPV),setback viscosity(SBV),breakdown viscosity(BDV),consistence viscosity(CSV)might be controlled by a major gene and several minor genes;and peak time(PeT)might be controlled by two major genes and several minor genes.In order to understand the genetic basis of the paste viscosity characteristics,the recombinant inbred line populations derived from Nikken 2/Milyang 23 and its genetic linkage map were used to map the QTLs controlling RVA profiles in 2005 and 2006.The results showed a total of 34 QTLs distributed on chromosomes 1,2,3,4,6,7 and 8 in 2005 and 2006,including 19 and 15 QTLs in 2005 and 2006,respectively;eight QTLs were both found in two years,the qHPV6,qCPV6,qCSV6,qSBV6,qBDV6 were located on chromosome 6,while qHPV2,qCSV2,qCPV2 were located on chromosome 2.The genes involved in amylopectin synthesis on chromosome 2 were greatly related with RVA profile.