interval effect
10.The QTL in the marker interval C732?R2672 of chromosome 12 had the largest effect ,which could underly PH about 2.3cm and explained 4.85% of the total phenotypic variance in 2000.3)Seven QTLs for PL were detected on chromosome 1, 2, 7, 9, 10 and11 .Among them two were mapped on chromosome 2. All these QTL had small additive effect ranging from 0.2 1cm to 0.53cm.

