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Characterization of a set of common wheat– Hordeum chilense chromosome 7H ch introgression lines and its potential use in research on grain quality traits
Author(s) -
Mattera M. Gabriela,
Cabrera Adoracion
Publication year - 2017
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/pbr.12470
Subject(s) - biology , introgression , chromosome , common wheat , genetics , chromosomal translocation , botany , gene
Chromosome 7H ch from Hordeum chilense has potential for improving seed carotenoid content in wheat as it carries a Phytoene synthase 1 ( Psy1 ) gene, which has a major role in this trait. Structural changes in chromosome 7H ch were obtained in common wheat background by crossing the wheat disomic substitution line 7H ch (7D) with a disomic addition line carrying chromosome 2C c from Aegilops cylindrica in common wheat cv. ‘Chinese Spring’. Rearranged 7H ch chromosomes were cytologically characterized by FISH . A set of 24 molecular markers and the Psy1 gene were used to identify the H. chilense chromosome segments involved in the introgressions. Six structural rearrangements of chromosome 7H ch were identified. They included three homozygous wheat– H. chilense centromeric translocations, one involving the 7H ch S arm (T‐7H ch S·A/B) and two involving the 7H ch L arm (T1‐7H ch L·A/B and T2‐7H ch L·A/B). In addition, one 7H ch S arm deletion, one 7H ch L·7H ch L isochromosome and one 7H ch S telosome were obtained in hemizygous condition. These genetic stocks will be useful for studying the effect of chromosome 7H ch on wheat flour colour.