QTL mapping of agronomic and economic traits for four F2 populations of upland cotton

Abstract Background Upland cotton ( Gossypium hirsutum ) accounts for more than 90% of the annual world output because its high yield potential. However, and fiber quality traits often show negative correlations. We constructed four F 2 populations upland cotton, using two normal lines (4133B SGK9708) with potential but moderate introgression (Suyuan04–3 J02–247) superior quality, used them to investigate genetic basis underlying complex such as in cotton. also phenotyped eight agronomic economic mapped quantitative trait loci (QTLs). Results Extensive phenotype variations transgressive segregation were found across populations. maps 585.97 centiMorgan (cM), 752.45 cM, 1 163.66 one each Fifty QTLs identified (7 plant height, 27 16 yield). The same different populations, including qBW4 qBW2, which linked a common simple sequence repeat (SSR) marker, NAU1255. A QTL cluster containing six was characterized on linkage group 9 4133B × Suyuan04–3 population. Conclusions These findings will provide insights into simultaneous improvement breeding.