Effect of ultra-low temperature storage on the viability of pepper pollen and its implications for hybrid breeding

文献类型： 外文期刊

第一作者： Du, Kanghua

作者： Du, Kanghua;Zhang, Da;Ma, Jixian;Dan, Zhong;Lv, Weiwu;Yang, Long;Bao, Lingfeng;Li, Yirong;Chen, Guangping;Mu, Wanfu;Wen, Xianqin;Zhang, Jie

作者机构：

关键词： pepper; pollen; ultra-low temperature preservation; long-term storage; viability

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.8； 五年影响因子：5.7 ）

ISSN： 1664-462X

年卷期： 2025 年 16 卷

页码：

收录情况： SCI

摘要： Pollen plays a vital role in plant reproduction, acting as a carrier of male genetic material for fertilization and ensuring species propagation and the maintenance of biodiversity. Ultra-low temperature preservation of pollen provides a reliable method for long-term storage while preserving its viability, thereby facilitating crop breeding, genetic resource conservation, and ecological restoration. This study aimed to establish a method for long-term preservation of pepper pollen under ultra-low temperature conditions. Pollen was collected from unopened flowers during the peak flowering stage of pepper plants and subjected to sequential treatments including pollen dispersal, drying, dehydration (water content of pollen < 10%), sealing with inert gas (nitrogen), pre-cooling treatment, long-term preservation at -80 degrees C, thawing treatment followed by artificial pollination. The results demonstrated that pepper pollen preserved for one year using our method maintained a pollination rate over 90%. Comparisons with fresh pollen (CK) indicated no significant differences in either the number or quality of hybrid seeds. This study establishes a theoretical and practical foundation for crop genetic breeding and germplasm conservation research, thereby facilitating the rapid advancement of hybrid breeding in pepper.

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