Naranjo T
Departamento de Genética, Facultad de Biología, Universidad Complutense de Madrid, Spain.
Chromosome Res. 1994 Jul;2(4):275-9. doi: 10.1007/BF01552721.
Homoeologous relationships between the arms of wheat group 2 chromosomes were analysed by studying homoeologous pairing in wheat-rye hybrids. Chromosomes 2A and 2D were identified using telocentrics 2AS, 2DS or 2DL. The remaining wheat chromosomes and their arms were identified by C-banding. Wheat chromosomes in the hybrids were derived from plants which were heterozygous (Ph1/ph1b) and monotelocentric for 2AS, 2DS or 2DL. In these plants, chromosome 2B and the telocentric showed regular bivalent pairing. From the results of homoeologous pairing in wheat-rye hybrids, normal homoeologous relationships between 2AS, 2BS and 2DS, as well as between 2AL, 2BL and 2DL, were deduced. There was no evidence that wheat group 2 chromosomes were involved in evolutionary chromosome rearrangements. The existence of a pairing promoter gene on chromosome arm 2DS was supported.
通过研究小麦-黑麦杂种中的同源配对，分析了小麦第2组染色体臂之间的部分同源关系。利用2AS、2DS或2DL端着丝粒染色体鉴定了2A和2D染色体。其余的小麦染色体及其臂通过C带进行鉴定。杂种中的小麦染色体来源于杂合（Ph1/ph1b）且对2AS、2DS或2DL为单端着丝粒的植株。在这些植株中，2B染色体和端着丝粒染色体呈现规则的二价体配对。从小麦-黑麦杂种的同源配对结果中，推断出2AS、2BS和2DS之间以及2AL、2BL和2DL之间正常的部分同源关系。没有证据表明小麦第2组染色体参与了进化染色体重排。支持了在2DS染色体臂上存在一个配对促进基因。
