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REGULAR ARTICLE
Quantitative trait loci for leaf chlorophyll content at two developmental stages of rice (Oryza sativa L.)
Yanjun Dong, Zhongnan Yang, Jianlong Xu, Dongzhi Lin, Yasuhiro Sugimoto, Lijun Luo, Hanwei Mei
Communications
Biometry Crop Science (2007) 2 (1), 1-7.
ABSTRACT
Knowledge of the genetics of leaf chlorophyll content (LCC) at tillering and heading stages should help
develop rice varieties with high photosynthetic ability. In this study, 182 backcross-recombinant inbred
lines (BIL), derived from Koshihikari (japonica)/Kasalath (indica)//Koshihikari, were used to identify
quantitative trait loci (QTL) for LCC at the tillering and heading stages of rice. Continuous variation
and transgressive segregation for LCC were observed in the BIL population, indicating that LCC was a
quantitatively inherited trait. Seven QTL for LCC were identified and mapped to chromosomes 1 (two QTL),
2, 3, 4, 6, and 8, which individually accounted for 5.1 to 14.8% of the total phenotypic variation. Three
QTL (qLCC-1-1, qLCC-1-2 and qLCC-4) were common between the tillering and heading stages. The alleles
at four QTL (qLCC-1-1, qLCC-1-2, qLCC-2, and qLCC-8) from Koshihikari and the alleles at the other three
QTL (qLCC-3, qLCC-4 and qLCC-6) from Kasalath increased LCC. The tightly linked molecular markers
flanking the QTL detected in this study should be useful in improving photosynthetic ability in rice.
Key Words: leaf chlorophyll content (LCC); quantitative trait locus (QTL); rice
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