Mapping the mating type locus of Tetrahymena thermophila: meiotic linkage of mat to the ribosomal RNA gene.

Mapping the mating type locus of Tetrahymena thermophila: meiotic linkage of mat to the ribosomal RNA gene.
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绘制嗜热四膜虫交配型基因座图:mat 与核糖体 RNA 基因的减数分裂连接。

DOI:
10.1002/dvg.1020130106
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发表时间:
1992
期刊:
Developmental genetics
影响因子:
--
通讯作者:
Orias,E
Orias,E
中科院分区:
--
文献类型:
--
作者:
Bleyman,LK;Baum,MP;Bruns,PJ;Orias,E

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嗜热四膜虫具有多交配型系统。虽然性成熟细胞通常只表达一种交配类型,但其生殖细胞(微核)携带5至7种交配类型的遗传潜力。允许的交配类型集由matlocus指定。细胞表达哪种特定交配类型的选择反映了体细胞核(大核)的体细胞遗传、发育程序化分化。在这项工作中,我们报告,该位点的地图2号染色体的左臂,确定缺体缺失定位。我们还报告了29 cM之间的距离的matlocus和核糖体RNA基因,以前映射到染色体2L。这代表了四膜虫减数分裂连锁的另一个(罕见)案例。© 1992 Wiley利斯,Inc.
Tetrahymena thermophilahas a multiple mating type system. While a sexually mature cell usually expresses only one mating type, its germline (micronucleus) carries the genetic potential for 5 to 7 mating types. The set of allowed mating types is specified by thematlocus. The choice of which particular mating type is expressed by a cell reflects a somatically inherited, developmentally programmed differentiation of the somatic nucleus (macronucleus). In this work we report that thematlocus maps to the left arm of chromosome 2, as determined by nullisomic deletion mapping. We also report a distance of 29 cM between thematlocus and the ribosomal RNA gene, previously mapped to chromosome 2L. This represents another (rare) case of meiotic linkage inTetrahymena.© 1992 Wiley‐Liss, Inc.
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