Open AccessChromosome instability in intergeneric hybrids of Triticum aestivum × tritordeum (amphiploid Hordeum chilense × Triticum turgidum ) with high dosage of Ph 1 gene of wheat
Author(s) -
VIEIRA R.,
MELLOSAMPAYO T.,
QUEIROZ A.,
MORAIS L.,
VIEGAS W. S.
Publication year - 1991
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.1601-5223.1991.tb00334.x
Subject(s) - biology , hybrid , triticum turgidum , chromosome , isochromosome , genome , chromosome instability , genetics , somatic cell , ploidy , common wheat , gene , botany , karyotype
In somatic cells of intergencric hybrids Truicum uestirum (mono‐isosomic 5BL, 2n=6x=4f)x trinordum 12n = 6x = 42, amphiploid Hordeum clulense x Triticum turgidnm)it was observed that high dosage of the long arm of 5B induced chromosome instability in hybrids 2n=42, in hybrids 2n=41 with only one dose of 5BL from the normal 5B genome of the teteaploed wheat, all cells have consistently 2n=41 chromosomes and no rmal 5B genome of the tetraploid wheat all cells have consistently 2n=41 plant differenttation in plants with 2n=42 which carry three doses of 5BL (one isochromosome 5BL and one 5B chromosome)most of the metaphase cells had 2n=42 chromosomes. However other cells in a reasonable frequency varying from 19% to 40% carried from 2n=6 to 2n=44. and showed marked desturbances in all phases of the cell cycle leading to final failure in plant development. It is suggested that the Ph 1 geng of wheat. Located on 5BL regulates chromosome stability in the somatic cells of those hybrids.