QTL mapping of soybean resistance to whitefly (Bemisia Tabaci Gennadius) under multi-environment conditions

摘要

Whitefly (Bemisia tabaci Gennadius) is an agricultural pest that widely occurs and severely harms soybeans around the world. Preventing and controlling whitefly infestation is difficult. In addition, identification of resistance to whitefly is difficult and time-consuming. Marker assisted selection (MAS) has been considered as a most effective way to breed whitefly-resistant soybean varieties. This study investigates the quantitative trait loci (QTL) of whitefly resistance in soybean in multi-year and multi-site trials to provide useful information for soybean breeding. The JRB1F2 population (Huapidou × Qihuang26), consisting of 170 plants, was used to construct a genetic linkage map with simple sequence repeat markers to identify the QTLs associated with whitefly resistance. Eight QTLs, directly associated with whitefly resistance, were identified in the JRB1F2:3 population derived from the JRB1F2 population in Jinan and Guanxian in 2008 to 2010, using both of the composite interval mappings of Win QTL Cartographer Version 2.5. Six QTLs were detected in Jinan, in which the maximal accounts for 37.3% on chromosome 17 between sat_326 and sat_172, whereas the minimal accounts for 9.2% on chromosome 5 between satt236 and sat_271. Two QTLs were detected in Guanxian, accounting for 36.9% and 16.1% on chromosomes 1 and 2, respectively. These identified QTLs would be beneficial for MAS of whitefly resistant soybean varieties.