Panicle angle of the RIL population derived from a cross between two japonica varieties Xiushui 79 and C Bao was investigated in four growing environments. Genetic analysis was conducted by mixed major gene plus polygene inheritance models, and QTL identification was performed by QTLNetwork 2.0 and composite interval mapping approach of WinQTLcart 2.5 software in the RIL population. Results were as follow: 1) panicle angle was controlled by two major genes plus polygenes, mainly by major genes; 2) eight QTLs were detected by QTLNetwork 2.0 software, explaining 0.01%-39.89% phenotypic variation. 12 QTLs were detected by WinQTLcart 2.5 software, explaining 2.83%-30.60% phenotypic variation. All the QTLs detected above were located on chromosomes 4, 5, 6, 7, 9 and 11. Of which, two major QTLs (qPA9.2 and qPA9.5) at RM3700-RM3600 and RM5652-RM410 and qPA9.7 at RM257-OSR28 were all detected by the two methods in the four environments. The negative effect alleles of the three QTLs were contributed by Xiushui 79; 3) eight pairs of epistatic QTLs with few effects were also detected. QTL × environment interactions were not significant for additive QTLs and epistatic QTL pairs.
NIU Fuan1,2, LIU Jian1, GUO Yuan1, CHEN Lan1, JIANG Jianhua1, HONG Delin1,*
. New Stably Expressed Loci for Panicle Angle in japonica Rice in Four Environments[J]. Chinese Journal OF Rice Science, 2012
, 26(4)
: 409
-416
.
DOI: 10.3969/j.issn.10017216.2012.04.004
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