Open AccessChromosome and genomic relationships between the diploid species Avena strigosa , A. eriantha and the tetraploid A. maroccana
Author(s) -
J. M. Leggett
Publication year - 1998
Publication title -
heredity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.441
H-Index - 118
eISSN - 1365-2540
pISSN - 0018-067X
DOI - 10.1046/j.1365-2540.1998.00305.x
Subject(s) - biology , ploidy , chromosome pairing , genome , avena , botany , chromosome , genetics , gene
Chromosome pairing in the diploid species Avena strigosa (genome AsAs), A. eriantha (genome CpCp) and the hybrid between them was broadly similar to a previous report. The derived autoallotetraploid ( A. strigosa × A. eriantha ) 2 showed greater variation of chromosome pairing than expected, particularly with regard to the frequency of rod bivalents and univalents. The hybrid ( A. strigosa × A. eriantha ) 2 × A. maroccana (genomes AACC) would be expected to form 14 bivalents if the AsAs and CpCp genomes of A. strigosa and A. eriantha were completely homologous, respectively, to the AA and CC genomes of A. maroccana . Chromosome pairing in the hybrid was poor, however, indicating that it is unlikely that A. eriantha or A. strigosa participated in the formation of the tetraploid A. maroccana .