Abstract

The genomic constitution of two species in the genus Psammopyrum, i.e., Ps. athericum (2n = 6x = 42) and Ps. pungens (2n = 8x = 56), was studied by genomic in situ hybridization (GISH). In Ps. athericum, one diploid chromosome set hybridized to a genomic probe from Pseudoroegneria ferganensis (St genome), one diploid set to a probe from Agropyron cristatum (P genome), and one diploid set to a probe from Thinopyrum junceiforme ((EEe)-E-b genomes) or Th. bessarabicum (E-b genome). Substituting the St-genome probe with an L-genome probe from Festucopsis serpentinii resulted in exactly the same hybridization pattern, suggesting a genomic constitution of EStP or ELP for Ps. athericum. The same probes used on Ps. pungens showed two diploid sets of chromosomes hybridizing to the St-genome probe, one diploid set hybridizing to the P-genome probe, and one diploid set hybridizing to the (EEe)-E-b-genome probe. The L-genome probe hybridized to approximately 14 of the chromosomes that were labeled by the St-genome probe. Hence the genomic constitution for Ps. pungens is proposed to be EStStP or EStLP

Published in

Genome
2003, Volume: 46, number: 1, pages: 164-169
Publisher: NATL RESEARCH COUNCIL CANADA

SLU Authors

• von Bothmer, Roland

  • Department of Crop Science, Swedish University of Agricultural Sciences
    

• Salomon, Björn

  • Department of Crop Science, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Food Science
Agricultural Science


Publication identifier

DOI: https://doi.org/10.1139/G02-115

Permanent link to this page (URI)

https://res.slu.se/id/publ/1733