Genomic relationships between Dasypyrum villosum (L.) Candargy and D. hordeaceum (Cosson et Durieu) Candargy.

摘要: The origin and genomic constitution of the tetraploid perennial species Dasypyrum hordeaceum (2n = 4x = 28) its phylogenetic relationships with annual diploid villosum (2n = 2x = 14) have been investigated by comparing two genomes using different methods. There is no apparent homology between conventional or Giemsa C-banded karyotypes species, nor can karyotype D. be split up into similar sets. Polymorphism within several chromosome pairs was observed in both karyotypes. Cytophotometric determinations Feulgen–DNA absorptions showed that genome size twice as large villosum. Both cross × (crossability rate 12.1%) reciprocal 50.7%) produced plump seeds. Only those from former germinated, producing sterile plants a phenotype intermediate parents. In these hybrids (2n = 21), an average 13...