Abstract:

Mapping of quantitative trait loci (QTL) and gene × environment interaction were used to research the height of plant from a RIL (recombinant inbred lines) including 130 lines deriving from Milyang 46 and FJCD during the grain-filling. This research work carried in Wuyishan and Putian. In Wuyishan, two additive QTLs were located on chromosome 1, 2, in which the main effect qPH-2-5 explained 26.2% of the phenotypic variation; in Putian, four additive QTLs were detected, located on chromosome 2, 2, 2, 6, and explained 20.61% of the phenotypic variation. After GE interaction analysis, two background QTLs had significant additive × environment interaction effects and explained 17.36% of the phenotypic variation. This study reveals the law of quantitative genetics on the height of plant in a way, and provides theoretical basis for molecular breeding.