[Substitution mapping of QTL for panicle exertion using CSSL in rice (Oryza sativa L.)].
Panicle exertion, the distance between the leaf cushion of flag and the neck-panicle node, is an important morphological trait, which has significant impact on hybrid seed production of rice. In this study, 94 chromosome segment substitution lines (CSSL), derived from 9311/Nipponbare with 9311 as the recurrent parent, were used to analyze quantitative trait loci (QTL) controlling the panicle exertion. The results showed that 17 CSSL contained QTL for the panicle exertion. Using substitution mapping, 8 QTLs were mapped on rice chromosomes 2, 3, 7, 8, 9, and 11, respectively. The QTL additive effect ranged from 0.10 to 3.20, and the additive effects of qPE-9 and qPE-11 were 3.15 and 2.95, respectively, showing the feature of a major gene. In addition, qPE-2-2, qPE-3-1, qPE-3-2, qPE-7, and qPE-8 were mapped in a marker interval less than 10.0 cM. Mapping of the QTL has laid a foundation for improving the panicle exertion with marker-assisted selection and cloning of the QTL in rice.
Yang
De-Wei
DW
Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Jiangsu High Quality Rice Research and Development Center, Nanjing Branch of China National Center for Rice Improvement, Nanjing 210014, China. dewei-y@163.com
Zhu
Zhen
Z
Zhang
Ya-Dong
YD
Lin
Jing
J
Chen
Tao
T
Zhao
Ling
L
Zhu
Wen-Yin
WY
Wang
Cai-Lin
CL
D002874:Chromosome Mapping; D032461:Chromosomes, Plant / Q000235:genetics*; D012275:Oryza / Q000033:anatomy & histology* / Q000235:genetics*; D040641:Quantitative Trait Loci