%0 Journal Article
%T Identification of qGL4.1 and qGL4.2, two closely linked QTL controlling grain length in rice.
%A Yun P
%A Zhang C
%A Ma T
%A Xia J
%A Zhou K
%A Wang Y
%A Li Z
%J Mol Breed
%V 44
%N 2
%D 2024 Feb
%M 38304382
%F 3.297
%R 10.1007/s11032-024-01447-y
%X Grain size is an important appearance quality trait in rice, which also affects grain yield. In this study, a recombinant inbred line (RIL) population derived from a cross between indica variety 9311 and japonica variety Cypress was constructed. And 181 out of 600 RILs were sequenced, and a high-density genetic map containing 2842 bin markers was constructed, with a total map length of 1500.6 cM. A total of 10 quantitative trait loci (QTL) related to grain length (GL), grain width (GW), grain length-to-width ratio (LWR), and 1000-grain weight (TGW) were detected under two environments. The genetic effect of qGL4, a minor QTL for GL and TGW, was validated using three heterogeneous inbred family (HIF) segregation populations. It was further dissected into two closed linked QTL, qGL4.1 and qGL4.2. By progeny testing, qGL4.1 and qGL4.2 were successfully delimited to intervals of 1304-kb and 423-kb, respectively. Our results lay the foundation for the map-based cloning of qGL4.1 and qGL4.2 and provide new gene resources for the improvement of grain yield and quality in rice.<BR><B>UNASSIGNED: </B>The online version contains supplementary material available at 10.1007/s11032-024-01447-y.