[Mapping of QTLs of Cd2+ content in brown rice under Cd2+ stress in rice].
A population of F8 recombinant inbred lines (RILs), derived from a cross between IR26 (Oryza sativa L. spp. indica) and Jiucaiqing (japonica), were used to identify the quantitative trait loci (QTLs) for Cd2+ content in brown rice under 5 mg/kg Cd2+ stress. Two QTLs, qCCBR-11a and qCCBR-11b, associated with the Cd2+ content in brown rice, were detected on chromosome 11. qCCBR-11a was located at the position between markers RM6288 and RM6544, accounting for 11.17% of the phenotypic variance with an additive effect value of 0.089. qCCBR-11b at the interval between markers RM167 and RM5704 explained 7.66% of the phenotypic variance with an additive effect value of 0.075. In addition, the correlation coefficients between Cd2+ content of brown rice and plant height, spikelets per panicle, filled grains per panicle, seed setting rate, and 1 000-grain weight were not significant. This suggested that the Cd2+ content in brown rice under Cd2+ stress was an independent genetic trait.
CHEN
Zhi-De
ZD
State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China. chen701865@yahoo.com.cn
WANG
Zhou-Fei
ZF
HE
Jian-Bo
JB
ZHONG
Wei-Gong
WG
WANG
Jun
J
YANG
Jie
J
ZHANG
Hong-Sheng
HS
D002104:Cadmium / Q000633:toxicity*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects / Q000235:genetics; D012275:Oryza / Q000187:drug effects* / Q000235:genetics* / Q000378:metabolism; D040641:Quantitative Trait Loci / Q000235:genetics*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
D014874:Water Pollutants, Chemical; D002104:Cadmium