Open AccessCrossability and chromosome pairing in some interspecific Triticum hybrids
Author(s) -
CLAESSON L.,
KOTIMÄKI M.,
BOTHMER R. VON
Publication year - 1990
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1990.tb00136.x
Subject(s) - biology , chiasma , chromosome pairing , hybrid , botany , backcrossing , aegilops tauschii , pollen , interspecific competition , chromosome , genetics , gene
Different species of Triticum (sensu stricto) were crossed with T. ovatum, T. triunciale, T. crassurn . and T. tauschii (belonging to the previously recognized genus Aegilops ). Hybrid plants were obtained in 7 interspecific combinations. The seed set was rather good in most attempts when a species from Triticum sp. (sensu stricto) was used as male parent, but low when used as female. All the hybrids were sterile; pollen stainability was about 1 % and no seeds were set. The chromosome pairing was low with few bivalents, mainly as rods. Multivalents were rare. The chiasma frequency ranged from 7.64 chiasmataiceil ( T. triunciale x T. aestivum ssp. aestivum ) to 0.76 chiasmata/cell in T. aestivum ssp. aestivurn x T. ovatum. T. triunciule x T. aestivum ssp. spelta was backcrossed to bread wheat. Most plants in the first three backcross generations were strongly hyperploid. The plants were male sterile, probably due to cytoplasmic interactions.