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Identification and Expression of TOP3? in Gerbera hybrida

文献类型： 外文期刊

作者： Li, Shenchong 1 ; Cheng, Ying 3 ; Sun, Dan 2 ; Ma, Lulin 2 ; Li, Mingyang 1 ; Li, Fan 2 ;

作者机构： 1.Southwest Univ, Coll Hort & Landscape Architecture, Chongqing 400715, Peoples R China

2.Yunnan Acad Agr Sci, Natl Engn Res Ctr Ornamental Hort, Floriculture Res Inst, Key Lab Flower Breeding Yunnan Prov, Kunming 650200, Yunnan, Peoples R China

3.Yunnan Univ, Sch Agr, Kunming 650504, Yunnan, Peoples R China

关键词： Gerbera hybrida; meiotic recombination; TOP3?; gene expression; ornamental breeding

期刊名称：HORTICULTURAL PLANT JOURNAL （ 影响因子：1.524； ）

ISSN： 2095-9885

年卷期： 2021 年 7 卷 2 期

页码：

收录情况： SCI

摘要： Meiotic recombination and the resulting novel allele combinations are fundamental to plant breeding and the identification of superior hybrids. However, the rate of meiotic crossovers is naturally suppressed below its potential ability, which prevents plant breeding efficiency. Nine suppressors of meiotic recombination have been identified in the model plant Arabidopsis and in other crop species. Mutations in these genes can lead to increased recombination frequency and could therefore potentially be used to create hyper-recombinant lines for ornamental breeding. In Gerbera hybrida, the anti-crossover factors remain elusive. In this study, we isolated and cloned TOP3? from flower buds of G. hybrida, and it encoded 935 amino acids with three conserved domains TOPRIM, TOP1Ac and zf-GR. Moreover, TOP3? was the highest expressed at the flower bud stage, which coincided with the occurrence of meiotic recombination, suggesting that TOP3? is associated with the regulation of meiotic recombination in G. hybrida.

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