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为了加深理解水稻性状相关的遗传基础,用一个以HR5和珍汕97杂交构建的重组自交系群体(F6和F7)检测控制主效QTL和上位性QTL.两年中,5个形态性状,即抽穗期(HD)、株高(PH)、穗长(PL)、剑叶长(FLL)和剑叶宽(FLW)呈现高度的正相关.每个性状检测到4～8个主效QTL.剑叶长、抽穗期、剑叶宽和穗长分别检测到1,4,4和5个双位点互作QTL(E-QTL).除了E-QFll1,每个E-QTL解释性状变异低于3%.对QTL定位结果进行了比对以便剖析性状相关的遗传基础,发现具有多效性的主效QTL和紧密连锁的QTL簇是性状相关的主要遗传基础.没有检测到上位性互作QTL(E-QTL)具有多效性.尽管上位性互作QTL也在单个性状的遗传基础中起重要作用,但对性状相关贡献不大.
In order to deepen the understanding of the genetic basis related to rice traits, a main inbred QTL and epistatic QTL were detected using a recombinant inbred population (F6 and F7) constructed by cross between HR5 and Zhenshan 97. In two years, five morphological traits, (HD), plant height (PH), panicle length (PL), flag leaf length (FLL) and flag leaf width (FLW) were highly positive correlation.Each trait detected 4 ~ 8 main effect QTL Four QTLs (E-QTLs) were detected at 1, 4, 4 and 5 loci in flag leaf length, heading date, flag leaf width and spike length, respectively. Except for E-QFll1, Less than 3% .The QTL mapping results were compared in order to analyze the genetic basis of trait correlation, and found that the major and major QTLs with pleiotropy and the closely linked QTL clusters were the main genetic basis of traits. The QTL (E-QTL) was pleiotropic Although the epistatic QTL also played an important role in the genetic basis of individual traits, it did not contribute much to the traits.