Open AccessCytogenetic behaviour in octoploid Triticale
Author(s) -
WEIMARCK ANNA
Publication year - 1975
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.1601-5223.1975.tb01506.x
Subject(s) - chiasma , biology , meiosis , hybrid , triticale , genetics , metaphase , micronucleus test , botany , chromosome , gene , chemistry , organic chemistry , toxicity
Meiosis and fertility in F 1 hybrids between octoploid Triticale strains have been investigated. A reduction of the chiasma frequency was observed between diakinesis and first metaphase in F 1 hybrids as well as in parents and other octoploid strains. Chiasma frequency at diakinesis was approximately the same in the F 1 hybrids as in the parents, but at first metaphase chiasma frequency was considerably lower in the F 1 hybrids than in the parents. There was a higher frequency of meiotic irregularities such as univalents, multivalents and micronuclei in F 1 than in parents. As compared with the parents, fertility was lower in the F 1 hybrids. Meiosis and fertility in the hybrids is discussed in relation to structural rearrangements and possible substitutions of chromosomes.