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Homeology Between the Chromosomes of Avena macrostachya and the Avena C Genome
Author(s) -
Pohler W.,
Hoppe H.D.
Publication year - 1991
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1991.tb00508.x
Subject(s) - biology , avena , hybrid , ploidy , genome , botany , backcrossing , poaceae , genetics , gene
To gain more information about the widely unknown genome constitution of the taxonomically and agronomically interesting wild oat Avena macrostachya , this tetraploid species was crossed (as the pollinator) with several diploid Avena species. Hybridization failed with A. strigosa (A s A s ), A. hirtula (A s A s ), and A. longiglumis (A 1 A 1 ), but succeeded with A. atlantica (A s A s ), A. prostrata (A p A p ), and A. pilosa (C p C p ). The output of hybrids and the vitality of the F: plants were highest in the combination A. pilosa × A. macrostachya. Hybrids from this cross relatively frequently showed trivalents at metaphase I as compared to the nearly consistent formation of seven univalents and seven bivalents in hybrids with the A genome species A. atlantica and A. prostrata . Altogether, the results confirm an auto‐ploid origin of A. macrostachya and demonstrate that among the two known basic genomes A and C of the genus Avena only the latter exhibits considerable homeology to the A. macrostachya genome.