Molecular Characterization of Maize Genetic Resources in India: Present Status and Prospects
Maize has an unparalleled genetic richness as is evident from the existence of an array of landraces in several countries. India harbors tremendous genetic diversity of maize in various agro-ecological regions, particularly in the North-Eastern Himalayan (NEH) region. A study was undertaken with the specific objectives of molecular characterization and population genetic analyses of selected Indian maize landraces, and evaluation of agronomic performance of the landraces and their experimental crosses. Seventeen selected landraces from diverse agro- ecologies, including 10 accessions from the NEH region, were analyzed using 27 polymorphic SSR markers. The SSR markers were highly effective in differentiating the Indian maize landraces. Population genetic analysis, including Wrights F statistics, of the SSR data revealed greater genetic divergence among the NEH landraces in comparison with landraces/locals from other regions. The landraces/locals, along with the interpopulation experimental crosses, were also evaluated for their agronomic performance at two locations in India (Hyderabad and Delhi) during 2003 and 2004. Significant genotype×environment interactions were observed with respect to the agronomic performance of the landraces as well as the experimental crosses. Nevertheless, Sathi local, Jaunpur local, Dausa local, Jhabua local and S51 among the landraces revealed excellent yield potential and adaptability. Comprehensive molecular characterization and analysis of agronomic performance of a large set of Indian maize landraces, coupled with association genetic analysis, would not only provide valuable insights into the population genetic structure, but also would aid in diversifying the genetic base of breeding materials.
Maize Landraces SSR markers Population genetics Agronomic performance
B. M. Prasanna A. Singode A. Garg R. Kumar B. B. Singh
Division of Genetics, Indian Agricultural Research Institute (IARI), New Delhi-110012, India
国际会议
第九届亚洲玉米大会(the Ninth Asian Regional Maize Workshop)
北京
英文
40-43
2005-09-05（万方平台首次上网日期，不代表论文的发表时间）