title: RFLP mapping of QTLs for yield and related characters in rice (Oryza sativa L.).
abstract: Quantitative triat loci (QTLs) for yield and related traits in rice were mapped based on RFLP maps from two indica/indica F2 populations, Tesanai 2/CB and Waiyin 2/CB. In Tesanai 2/CB, 14 intervals carrying QTLs for eight traits were detected, including 3 for grain weight per plant (GWT), 2 for number of panicles per plant (NP), 2 for number of grains per panicle (NG), 1 for total number of spikelets per panicle (TNS), 1 for spikelet fertility (SF), 3 for 1000-grain weight (TGWT), 1 for spikelet density (SD), and 1 for number of first branches per main panicle. The 3 QTLs for GWT were located on chromosomes 1, 2, and 4, with 1 in each chromosome. The additive effect of the single locus ranged from 2.0 g to 9.1 g. A major gene (np4) for NP was detected on chromosome 4 within the interval of RG143-RG214, about 4cM for RG143, and this locus explained 26.1% of the observed phenotypic variance for NP. The paternal allele of this locus was responsible for reduced panicles per plant (3 panicles per plant). In another population, Waiyin 2/CB, 12 intervals containing QTLs for six of the above-mentioned traits were detected, including 3 for GWT, 2 for each of NP, TNS, TGWT and SD, 1 for SF. Three QTLs for GWT were located on chromosome 1, 4, and 5, respectively. The additive effect of the single locus for GWT ranged from 6.7 g to 8.8 g, while the dominance effect was 1.7-11.5 g. QTL mapping in two populations with a common male parent is compared and discussed.
authors.affiliation: China National Rice Research Institute, 310006, Hangzhou, P.R. China.
authors.forename: H X
authors.initials: HX
authors.lastname: Lin
authors.forename: H R
authors.initials: HR
authors.lastname: Qian
authors.forename: J Y
authors.initials: JY
authors.lastname: Zhuang
authors.forename: J
authors.initials: J
authors.lastname: Lu
authors.forename: S K
authors.initials: SK
authors.lastname: Min
authors.forename: Z M
authors.initials: ZM
authors.lastname: Xiong
authors.forename: N
authors.initials: N
authors.lastname: Huang
authors.forename: K L
authors.initials: KL
authors.lastname: Zheng