The effect of different genome and cytoplasm on meiotic pairing in maize newly synthetic polyploids

The effect of different genome and cytoplasm on meiotic pairing in maize newly synthetic polyploids
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不同基因组和细胞质对玉米新合成多倍体减数分裂配对的影响

DOI:
10.1007/s10681-015-1552-7
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发表时间:
2016-02
期刊:
影响因子:
1.9
通讯作者:
Qilin Tang
Qilin Tang
中科院分区:
农林科学3区
文献类型:
--
作者:
Mingjun Cheng;Mingmin Zheng;Shipeng Yang;Yang Li;Xingchun Dong;Jing Li;Rulong Sun;Huaxiong Li;Shufeng Zhou;Yuanqi Wu;Tingzhao Rong;Qilin Tang

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异源多倍化在许多作物的进化中起着特殊的作用。此外,一些异源多倍化事件的早期进化被预测为受到核质相互作用的影响。玉米和Teosintes是研究异源多倍化中遗传重组的良好模式系统。为了研究新合成的异源多倍体(新异源多倍体)的基因组结构和细胞质对基因组进化的影响,用玉米和玉米正反交产生了一系列新的异源多倍体。通过双色基因组原位杂交,对这些多倍体的基因组内和基因组间减数分裂配对进行了量化,并与其基因组结构和细胞质背景进行了比较。在四个新异源多倍体中,玉米基因组的稳定性始终低于OFZ。多年生基因组。另外,玉米基因组的稳定性还受到基因组倍性的影响。细胞质、基因组组成及其互作在染色体配对中确实具有特殊的作用,玉米异源多倍体的减数分裂行为差异显著,表现为非二倍化,多年生细胞质可能为玉米基因组提供一个相对宽松的环境。
Allopolyploidization plays the special role in the evolution of many crops. Moreover, the evolution in early stage of some allopolyploidization events is predicted to be effected by nuclear-cytoplasmic interactions. Maize and teosintes are well model system for study of genetic recombination in allopolyploidization. In order to investigate the effects of genome organization and cytoplasm on genome evolution in newly synthesized allopolyploids (neoallopolyploids), a series of neoallopolyploids were produced by reciprocal crosses of maize andZea perennis. By using dual-color genomic in situ hybridization, intra- and intergenomic meiosis pairing of these polyploids were quantified and compared with regard to its genome organization and cytoplasm background. In the four neoallopolyploids, the stability of maize genome is consistently lower than that ofZ. perennisgenome. Additional, the stability of maize genome is affected by genome ploidy. The cytoplasm, genome composition and their interaction do have the special role in chromosome paring and the meiosis behaviors inZeaallopolyploids vary significantly and showed non-diploidization.Z. perenniscytoplasm may give a relatively relaxed environment for maize genome.
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发表时间: 1991-11
影响因子: 5.4
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发表时间: 2015-05
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发表时间: 2013-03
影响因子: 2.9
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