ISSN:
1573-6849
Keywords:
C-banding
;
homoeologous pairing
;
homoeologous relationships
;
pairing genes
;
Triticum aestivum
;
wheat
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01552721
