Reference "RFLP mapping of QTLs for yield and related characters in rice (Oryza sativa L.)"

Reference ID

2455

Title

RFLP mapping of QTLs for yield and related characters in rice (Oryza sativa L.)

Source

Theoretical and applied genetics, 1996, vol. 92(8), pp. 920-927

Authors (8)

Lin-H-X	Qian-H-R
Zhuang-J-Y	Lu-J
Min-S-K	Xiong-Z-M
Huang-N	Zheng-K-L

Abstract

Quantitative trait loci (QTLs) for yield and related traits in rice were mapped
based on RFLP maps from two indica/indica 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 4?cM 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