Genomanalyse in the hybrid of Triticum dicoccum Schrnk. X Aegilops ventricosa Tausch

Resumo

The author performed the genomic analysis of the Triticum dicoccum Schrnk hybrid. X Aegilops ventricosa Tausch. The observations described would indicate that one of the genomes of Ae. ventricosa is homologous to a genome of Tr. dicoccum. In addition, some chromosomes from another genome of Ae. ventricosa pair with Tr chromosomes. dicoccum. The bivalents form rings, the pairing is often telosynthetic. Some Geminis are heteromorphic. The second genome is therefore not homologous, because its pairing is partial. Chromosome distribution responds to the behavior of genomes in meiosis. Based on the observations, it is necessary to monitor the cytosystematic relationship between Ae. ventricosa and Tr. dicoccum. It is not debatable that Tr. dicoccoides supplied their AB genomes in the classic essays by Me Fadden and Sears (1946) for the synthesis of Tr. spelta. It would result from this that the cyto-taxonomic separation of Tr. The dicoccum of the other members of Emmer's series presents well-founded contradictions. It is more likely that the formula for Ae. ventricsa. The D genome is not disputable as it has many analyzes between the genomes of the Pachystachys section. Possibly we have to revise the genome M changing it for one of the genomes (A or B). by Tr. dicoccum. It is necessary to emphasize that Ae. ventricosa differs in its geographic distribution from the other members of the Pachystachys section. This also supports the above data that the cytosystematic position of Ae. ventricosa needs to be modified.