QTL Analysis of Panicle Exsertion in Rice under Different Growing Environments
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan);The National High Technology Research and Development Program of China (863 Program)

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    Abstract:

    Combining with the phenotypic data at five different growing environments of Mile(2012, normal growing environment), Songming(2012, 2013, natural low temperature environment) and Lijiang(2012,2013, natural low temperature environment) and genotypic data, QTLs controlling the panicle exsertion in rice were analyzed by using a Towoda×Kunmingxiaobaibu –derived RIL population (F14) consisting of 225 lines. The results showed that 12 QTLs contolling the panicle exsertion in rice were detected under five different environments, and these QTLs were distributed on chromosome 1(2 QTLs), 2, 4, 6 (3 QTLs), 7 (3 QTLs), 9 (2QTLs) chromosome in respective, with the variance explained by a single QTL ranged from 3.72% to 22.17%. Among them , 11 QTLs were associated with the panicle exsertion in the main spike, and 7 QTLs were associated with the panicle exsertion in the spike tiller, 6 QTLs were associated with the panicle exsertion in both main spike and spike tiller. Among the 11 QTLs controlling the panicle exsertion in main spike, qPE-7-1 has been detected in four growing environments, explaining 9.49%~22.17% of observed phenotypic variation, and 4 QTLs (qPE-1-1, qPE-1-2, qPE-6-1 and qPE-9-2 ) have been detected in more than two growing environments. And 3 QTLs(qPE-1-2, qPE-7-1 and qPE-6-1, ) of 7 QTLs controlling the panicle exsertion in spike tiller have been detected in more than two growing environments, explaining 4.35%~12.64%, 13.22%~20.89% and 11.49%~15.73% of observed phenotypic variation in respective .

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History
  • Received:August 01,2014
  • Revised:September 28,2014
  • Adopted:May 27,2015
  • Online: June 11,2015
  • Published:
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