Population Improvement of Resistance to Late Blight in Tetraploid Potato:A Case Study in Combination with AFLP Marker Assisted Background Selection

作     者：YAO Chun-guang SONG Bo-tao LIU Jun WU Cheng-jin CHENG Qun LI Da-chun XIE Cong-hua 

作者机构：Key Laboratory of Horticultural Plant BiologyMinistry of Education/National Center for Vegetable Improvement （Central China）/Potato Engineering and Technology Research Center of Hubei Province/Huazhong Agricultural UniversityWuhan 430070P.R.China Southern Potato Research Center of China/Enshi Academy of Agricultural SciencesEnshi 445000P.R.China 

出 版 物：《Agricultural Sciences in China》 (中国农业科学（英文版）)

年 卷 期：2011年第10卷第8期

页      面：1177-1187页

核心收录：

学科分类：09[农学] 0904[农学-植物保护] 0901[农学-作物学] 090401[农学-植物病理学] 090402[农学-农业昆虫与害虫防治] 

基　　金：Funding from the National High Technology Research and Development Program of China (2003AA207130) 

主　　题：potato recurrent selection late blight horizontal resistance genetic diversity 

摘      要：Cultivated potato with high level of horizontal resistance against late blight is one of the most important goals of potato *** recurrent selection has been adopted to increase the level of potato horizontal resistance and a B3C1 population without R1-R11 dominant genes has been released by the International Potato Center at the short-day condition of *** present research was carried out to further improve the resistance and the agronomic traits of B3C1 population under long-day condition of Hubei,China,with maximized retention of its genetic ***-seven individual clones of B3C1 were used to generate population B3C2 by in-population crossing with the bulk pollens aiming to elevate the frequency of late blight resistance genotypes and to improve the adaptation to local long-day *** late blight resistance and the main agronomic traits including the maturity,the plant characters and the tuber traits were evaluated for the foreground selection in three years,by which 130 pedigrees were maintained as the basic population of B3C2 for further selection.A total of 312 polymorphic loci detected by 9 AFLP marker combinations were used to monitor the genetic diversity of the populations for the background *** B3C2 population of 51 clones was finally selected,of which the frequency of resistant genotypes increased by 23.8% points and the genetic diversity was maintained by about 96% as referred to *** results strongly suggested that combination of the foreground selection for target traits and the background selection for the genetic diversity is an efficient strategy in the recurrent selection of tetraploid potato to improve quantitative traits.