Abstract
Here we present an optimized protocol for in vitro embryo formation and plant regeneration through anther culture of the Mexican husk tomato (Physalis ixocarpa Brot.). This protocol relies on the application of an anther thermal shock at a specific developmental stage prior to the in vitro culture, ensures embryo formation from anthers without callus formation, and allows spending less time to regenerate doubled haploid complete plants. This protocol has been used for different cultivars of Physalis ixocarpa (Chapingo, Rendidora, Puebla, Arandaz, Manzano, Tamazula, Salamanca, and Milpero), and also for two wild-type accessions, all of them cultivated in Mexico. Chapingo cultivar responded with the highest percentage of androgenesis on the embryo induction medium (EIM).
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