Abstract
Homozygous parental lines are indispensable for commercial hybrid seed production in many ornamental and vegetable crops. The in vitro induction of haploids and doubled haploids (DHs) through gametic embryogenesis is an effective approach for single-step development of complete homozygous lines from heterozygous donor plants. Anther culture is one of the most popular and widely employed techniques for development of haploids. Here we describe the detailed protocol for rapid and successful induction of haploids in Tagetes spp. using in vitro androgenesis approach. In this protocol, we have provided the comprehensive details of various steps of anther culture in marigold right from the growing of donor plants, selection of buds, pretreatment, embryogenesis and regeneration to ploidy analysis, and chromosome doubling for development of DHs.
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