Vol. 6, Issue 6 (2018)
Validation of QTLs associated with yield and yield related traits in rice (Oryza sativa L.)
Author(s): Balram Marathi and Maliha Allugundu
Abstract: A previous study conducted on a new plant type based recombinant inbred line mapping population derived from Pusa1266 X Jaya identified nine major quantitative trait loci (QTLs) expressing across environments for nine yield and yield component traits. For utilization of the markers flanking the major QTLs for marker assisted improvement, we analyzed SSR markers flanking QTL regions in a set of 120 germplasm lines to find marker QTL association. Out of eighteen markers linked to nine QTLs representing nine traits, seven markers linked to six QTLs showed significant association with respective traits in germplasm lines. Two flanking markers, RM152 and RM25 linked to a QTL qDFF8-1 was significantly associated with days to 50% flowering at P≤0.01 level and explained 6% and 16% of phenotypic variation in the germplasm lines respectively. A QTL affecting panicles per plant (qPPP4-1) flanked by marker RM262 showed significant association in the germplasm lines. The genomic region showing pleiotropic effect on flag leaf width (qFLW4-2), spikelets per panicle (qSPP4-1), filled grains per panicle (qFGP4-2) and spikelet setting density (qSSD4-2) flanked by SSR marker RM3276 was significantly associated at P≤0.01 explaining 9%, 6%, 9% and 12% of phenotypic variation respectively in germplasm lines. The markers RM25, RM262 and RM3276 showing significant association of genomic region in germplasm lines can be utilized for marker assisted improvement of the component traits of yield in rice.
Pages: 1787-1791 | 332 Views 49 Downloads
download (7626KB)
How to cite this article:
Balram Marathi, Maliha Allugundu. Validation of QTLs associated with yield and yield related traits in rice (Oryza sativa L.). Int J Chem Stud 2018;6(6):1787-1791.
