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首页> 外文期刊>Genome >Abnormal mitosis induced by wheat-rye 1R monosomic addition lines
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Abnormal mitosis induced by wheat-rye 1R monosomic addition lines

机译：小麦-黑麦1R单体添加系诱导的有丝分裂异常

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Octoploid triticale were derived from common wheat (Triticum aestivum L. 'Mianyang11') × rye (Secale cereale L. 'Kustro'), and some progeny were obtained by the backcrossing of triticale with 'Mianyang11' followed by self-fertilization. In situ hybridization using rye genomic DNA and repetitive sequences pAs1 and pSc119.2 as probes was used to analyze the mitotic chromosomes of these progeny. Three wheat-rye 1R monosomic addition lines and a wheat line (12FT-1685) containing a 1R and a 1BL.1RS translocation chromosome were identified. Abnormal mitosis was observed in the two lines. During mitosis of a 1R monosomic addition line (3-8-20-1R-2), lagging chromosomes, micronuclei, chromosomal bridges, and the one pole segregation of 1R chromosome were observed. Abnormal mitotic behaviour of chromosomes was also observed in some of the self-progeny plants of lines 12FT-1685 and 3-8-20-1R-2. These progeny contained 1R chromosome or 1R chromosome arm. In addition, 4B chromosomes were absent from one of the progeny of 3-8-20-1R-2. This abnormal mitotic behaviour of chromosomes was not observed in two other 1R monosomic addition lines. These results indicate that a single 1R chromosome added to wheat might cause abnormal mitotic behaviour of both wheat and rye chromosomes and different genetic variations might occurr among the sibling 1R monosomic addition lines.
机译：八倍体小黑麦是从普通小麦（Triticum aestivum L.使用黑麦基因组DNA和重复序列pAs1和pSc119.2作为探针进行原位杂交，以分析这些后代的有丝分裂染色体。鉴定了三个小麦-黑麦1R单体添加系和一个包含1R和1BL.1RS易位染色体的小麦系（12FT-1685）。在两条线中观察到异常的有丝分裂。在1R单体附加线（3-8-20-1R-2）的有丝分裂过程中，观察到滞后的染色体，微核，染色体桥以及1R染色体的单极分离。在12FT-1685和3-8-20-1R-2系的一些自体后代植物中也观察到了染色体的异常有丝分裂行为。这些后代包含1R染色体或1R染色体臂。另外，在3-8-20-1R-2的后代之一中不存在4B染色体。在另外两个1R单体加成系中未观察到这种异常的染色体有丝分裂行为。这些结果表明，添加到小麦中的单个1R染色体可能引起小麦和黑麦染色体的异常有丝分裂行为，并且兄弟1R单体添加序列中可能发生不同的遗传变异。

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