Open AccessMeiosis in interspecific Hoerdeum hybrids: III Tetraploid (2x × 6x) hybrids
Author(s) -
BOTHMER R. VON,
FLINK J.,
LANDSTRÖM T.
Publication year - 1988
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.1601-5223.1988.tb00294.x
Subject(s) - biology , ploidy , genome , meiosis , hybrid , hordeum , homologous chromosome , genetics , interspecific hybrids , chromosome pairing , botany , evolutionary biology , hordeum vulgare , poaceae , gene
Meiotic pairing in 17 new tetraploid, 2x × 6x, interspecific combinations is described. Together with earlier data it is evident that the diploid I genomes of Hordeum vulgare and H. bulbosum are not homologous to the genomes of the hexaploid species. H. brevisubulatum is a true autoploid, whereas the other hexaploids are alloploids or segmental alloploids. The H genome, present in most Hordeum diploids, is homo‐ or homoeologous to one of the genomes in all the hexaploids except H. murinum . The H genome of the American diploids is similar to that found in the American hexaploids in contrast to the apparently diverged H genome observed in the diploid European diploid species. The hexaploid H. murinum does not seem to have a genome homoeologous to any of the diploid species studied.