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The Identification and Mapping of a Tiller Angle QTL on Rice Chromosome 9
Author(s) -
Chen Ping,
Jiang Ling,
Yu Chuanyuan,
Zhang Wenwei,
Wang Jiankang,
Wan Jianmin
Publication year - 2008
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci2007.12.0702
Subject(s) - quantitative trait locus , biology , genetics , tiller (botany) , locus (genetics) , population , chromosome , allele , japonica , positional cloning , gene , botany , demography , sociology
Tiller angle is an important component of plant architecture in rice even though little is known of its mode of inheritance. A quantitative trait loci (QTL) analysis based on a set of recombinant inbred lines extracted from an indica × japonica cross identified a major effect locus (designated qTA‐9a ) on chromosome 9, which was expressed in two independent environments. The qTA‐9a allele derived from the indica parent IR24 increased tiller angle. This QTL was validated in a set of chromosome segment substitution lines involving the same two parental lines. A high resolution genetic map was constructed from a large secondary F 2 population and anchored to the genomic sequence of rice. The QTL was narrowed to a 65‐kb physical region, inclusive of eight putative genes. We have provided the basis for positional cloning of qTA‐9a and have developed markers for a major tiller angle QTL.