Heterozygosity analysis of spontaneous 2n female gametes and centromere mapping of the diploid Hevea brasiliensis based on full-sib triploid populations
文献类型： 外文期刊
作者： Zhang, Yuan-yuan 1 ; Li, Hong-kun 2 ; Huang, Xiao 1 ; Yuan, Yu-jiao 3 ; Zhang, Xiao-fei 1 ; Gao, Xin-sheng 1 ; Wang, Xiang-jun 1 ; Wei, Ming-ming 1 ; Huang, Hua-sun 1 ; Li, Weiguo 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Rubber Res Inst, State Ctr Rubber Breeding,Key Lab Biol & Genet Res, State Key Lab Trop Crop Breeding, Haikou 571101, Hainan, Peoples R China
2.Dehong Inst Trop Agr Sci Yunnan Prov, Ruili 678600, Yunnan, Peoples R China
3.Yunnan Agr Univ, Coll Trop Crops, Puer 665099, Yunnan, Peoples R China
关键词： 2n female gamete; SDR; Centromere location; Full-sib population; Hevea brasiliensis
期刊名称：PLANT REPRODUCTION （ 影响因子：3.4； 五年影响因子：4.0 ）
ISSN： 2194-7953
年卷期： 2023 年
页码：
收录情况： SCI
摘要： The evaluation of maternal heterozygosity restitution (MHR) is vital in identifying the mechanism of 2n gametogenesis and assessing the utilization value of 2n gametes. In this study, three full-sib triploid populations were employed to evaluate the MHR of 2n female gametes of rubber tree clone GT1 and to confirm their genetic derivation. The 2n female gametes of GT1 were derived from second-division restitution (SDR) and transmitted more than half of the parental heterozygosity. In addition, low recombination frequency markers were developed, and four candidate physical centromeres of rubber tree were located for the first time. The confirmation that 2n female gametes of rubber tree clone GT1 are derived from SDR provides insights into the molecular mechanisms of 2n gametogenesis. In addition, the identified centromere location will aid in the development of centromeric markers for the rapid identification of the 2n gametogenesis mechanism.
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