ISSN:
1432-2242
Keywords:
Triticum dicoccoides
;
Reciprocal translocation
;
Translocation breakpoint
;
C-banding
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract C-banding polymorphism was analyzed in eight strains of wild Emmer, Triticum dicoccoides Körn, which included six translocation homozygotes reported previously. Polymorphisms were detected in all of the strains examined, and the breakpoints of five spontaneous translocations were successfully identified by C-bands. Of the eight breakpoints that could be precisely identified, one was located in the centromeric region while the remaining seven were located in proximal to distal euchromatic regions. The two breakpoints of one translocation could only be approximately localized to proximal regions due to the scarcity of C-bands. The present results are in contrast with those observed on T. araraticum, another wild tetraploid wheat belonging to the Timopheevi group, in which most of the breakpoints were located in centromeric regions. In T. dicoccoides, the six translocation chromosome types were derived from the standard karyotype primarily by a mechanism other than centric breakage-fusion.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00223373
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