Genetic control of meiotic chromosome pairing in tetraploid Agropyron elongatum. I. Pattern of pairing in natural and induced tetraploids and in F1 triploid hybrids

A. Charpentier, M. Feldman, Y. Cauderon
{"title":"Genetic control of meiotic chromosome pairing in tetraploid Agropyron elongatum. I. Pattern of pairing in natural and induced tetraploids and in F1 triploid hybrids","authors":"A. Charpentier, M. Feldman, Y. Cauderon","doi":"10.1139/G86-110","DOIUrl":null,"url":null,"abstract":"Meiotic chromosome pairing was studied in natural and induced tetraploid Agropyron elongatum, as well as in triploid hybrids between natural tetraploid and diploid cytotypes. The natural tetraploids showed a highly regular, diploid-like pairing, while the induced ones showed an average of two to three multivalents per cell. A high level of pairing was exhibited by the triploid hybrids, 4.15 bivalents and 2.82 trivalents per cell, supporting the assumption that the natural tetraploid is of an autoploid origin. Frequencies of meiotic configurations of the induced tetraploid and of the F1 triploid hybrids deviated significantly from the expected values based on a model assuming random pairing within one homologous group in autoploids: the observed data were characterized by fewer multivalents than expected, indicating a tendency towards bivalentization. This tendency is fully realized in the natural tetraploid. The presence of a pairing-control system in these autoploids, most probably a genetic one, that de...","PeriodicalId":9589,"journal":{"name":"Canadian journal of genetics and cytology. Journal canadien de genetique et de cytologie","volume":"16 1","pages":"783-788"},"PeriodicalIF":0.0000,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"21","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Canadian journal of genetics and cytology. Journal canadien de genetique et de cytologie","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1139/G86-110","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 21

Abstract

Meiotic chromosome pairing was studied in natural and induced tetraploid Agropyron elongatum, as well as in triploid hybrids between natural tetraploid and diploid cytotypes. The natural tetraploids showed a highly regular, diploid-like pairing, while the induced ones showed an average of two to three multivalents per cell. A high level of pairing was exhibited by the triploid hybrids, 4.15 bivalents and 2.82 trivalents per cell, supporting the assumption that the natural tetraploid is of an autoploid origin. Frequencies of meiotic configurations of the induced tetraploid and of the F1 triploid hybrids deviated significantly from the expected values based on a model assuming random pairing within one homologous group in autoploids: the observed data were characterized by fewer multivalents than expected, indicating a tendency towards bivalentization. This tendency is fully realized in the natural tetraploid. The presence of a pairing-control system in these autoploids, most probably a genetic one, that de...
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
四倍体长柄草减数分裂染色体配对的遗传控制。自然四倍体和诱导四倍体以及F1三倍体杂种的配对模式
研究了天然四倍体和诱导的细长Agropyron染色体减数分裂配对,以及天然四倍体和二倍体细胞型之间的三倍体杂交。天然四倍体表现出高度规则的二倍体样配对,而诱导的四倍体表现出平均每个细胞有2到3个多价体。三倍体杂种表现出高水平的配对,每个细胞有4.15个二价体和2.82个三价体,支持了自然四倍体是自倍体起源的假设。诱导的四倍体和F1三倍体杂种减数分裂构型的频率明显偏离基于假设同源群体随机配对的模型的期望值:观察到的数据的多价体比预期的少,表明有双价体化的趋势。这种倾向在天然的四倍体中得到充分体现。在这些同倍体中存在配对控制系统,很可能是一种遗传系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
自引率
0.00%
发文量
0
期刊最新文献
Chromosome segregation from cell hybrids. II. Do differences in parental cell growth rates and phase times determine direction of loss? Use of Neurospora spore killer strains to obtain centromere linkage data without dissecting asci. Ascus development in two temperature-sensitive four-spore mutants of Neurospora crassa. Murine plasmacytomas constitute a class of natural heat-shock variants in which the major inducible hsp-68 gene is not expressed. Role of heterochromatin during preferential 9q;22q translocation in chronic myelogenous leukemia.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1