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First Report of a Successful Development of Yam Hybrids(Dioscorea alata L.)from Lyophilized and Long-Term Stored Pollens

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Phyton-International Journal of Experimental Botany 2023年第10期92卷 2861-2874页

作者： Erick Malédon Elie Nudol Christophe Perrot Marie-Claire Gravillon Ronan Rivallan denis cornet Hâna Chair Komivi Dossa CIRAD UMR AGAP InstitutPetit BourgGuadeloupe97170France UMR AGAP Institut Univ MontpellierCIRADINRAEInstitut AgroMontpellierF-34398France CIRAD UMR AGAP InstitutMontpellierF-34398France

Various biological constraints including erratic and asynchronous flowering between male and female plants hinder successful hybrid development and genetic gains in greater yam breeding ***,pollen storage has gained much attention to facilitate artificial pollinations and increase the genetic *** 4-year study aimed at developing a practical long-term pollen storage technique for the successful development of yam *** pollens were collected from two Dioscorea alata males,then lyophilized(two lyophilization treatments were applied),followed by storage at room temperature(24℃–25℃)for 12 ***,the lyophilized and stored pollens were tested for viability by crossing with four female *** results showed that lyophilization is effective for achieving viable pollens after 12 months of *** 1(48 h drying)showed higher pollen germination and fertility rates than Treatment 2(72 h drying).Although we observed a reduction in viability of lyophilized pollens after 12 months of storage,we generated hybrid seedlings with success rates from 12%to 21%compared to 21%–31%when using fresh *** testing based on molecular genotyping confirmed the hybrid status of the obtained seedlings,which grew well in a *** is a practical approach for a long-term storage of greater yam pollen *** protocol will positively impact yam breeding programs particularly in developing countries.

关键词： Yam freeze-drying pollen conservation genetic gain

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