STEPS AND FACTORS IN DOUBLE HAPLOID WHEAT PLANT PRODUCTION THROUGH WHEAT × MAIZE CROSS - A REVIEW

摘要

Double haploid (DH) production is a specific technique for facilitating breeding program to develop pure wheat lines. It involves two major steps i.e. haploid production and doubling of chromosome number. Wheat × maize crosses are used to get earlier homozygosity in bread wheat. Wheat filial generations (F 2 and F 3 ) have maximum transgressive segregation and take longer time to get homozygous after seven to eight generations. Intraspecfic crosses between wheat × maize gives earlier pure lines within two years. In this content, different factors contribute to the specificity of this process. An efficient work with full lab facilities on DH technique is required for early and high yielding wheat varieties development in shorter time comparative to conventional breeding. The literature was reviewed during the year 2015 after consulting research pursuits of world eminent scientists on double haploid studies.