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Mapping the GA 3 ‐insensitive dwarfing gene ct1 on chromosome 7 in rye
Author(s) -
Plaschke J.,
Korzun V.,
Koebner R.M.D.,
Börner A.
Publication year - 1995
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1995.tb00773.x
Subject(s) - biology , dwarfing , genetics , gene , chromosome , centromere , population , gene mapping , demography , sociology
A gibberellic acid‐insensitive dwarfing gene in rye ( ct1 ) was mapped in an F 2 population on chromosome 7R close to the centromere. Two RFLP markers were found, which flank the gene at distances of 1 and 3 cM, respectively. A total of 11 markers were mapped on 7R of which six cluster around the centromere and show segregation distortion in the case of the codominant markers. The ct1 gene is closely linked to copies of both α‐amylase and EmBP, as is the ct2 gene on chromosome 5R. Because of the different chromosomal locations of the GA 3 ‐insensitive dwarfing genes in rye and wheat it is concluded that these genes are not homoeologous. This is supported by further differences in their phenotypic and genotypic expressions.