Authors: K Ochiai S Uemura A Shimizu Y Okumoto T Matoh
Publish Date: 2008/04/10
Volume: 117, Issue: 1, Pages: 125-133
Abstract
Boron toxicity tolerance of rice plants was studied Modern japonica subspecies such as Koshihikari Nipponbare and Sasanishiki were tolerant whereas indica subspecies such as Kasalath and IR36 were intolerant to excessive application of boron B even though their shoot B contents under B toxicity were not significantly different Recombinant inbred lines RILs of japonica Nekken1 and indica IR36 were used for quantitative trait locus QTL analysis to identify the gene responsible for B toxicity tolerance A major QTL that could explain 45 of the phenotypic variation was detected in chromosome 4 The QTL was confirmed using a population derived from a recombinant inbred line which is heterogenic at the QTL region The QTL was also confirmed in other chromosome segment substitution lines CSSLs
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