Introgression of perennial growth habit from Lophopyrum elongatum into wheat.

Introgression of perennial growth habit from Lophopyrum elongatum into wheat.
Theor Appl Genet. 2020 Jun 03;:
Authors: Abbasi J, Xu J, Dehghani H, Luo MC, Deal KR, McGuire PE, Dvorak J
Abstract
KEY MESSAGE: A locus for perennial growth was mapped on Lophopyrum elongatum chromosome arm 4ES and introgressed into the wheat genome. Evidence was obtained that in addition to chromosome 4E, other L. elongatum chromosomes control perennial growth. Monocarpy versus polycarpy is one of the fundamental developmental dichotomies in flowering plants. Advances in the understanding of the genetic basis of this dichotomy are important for basic biological reasons and practically for genetic manipulation of growth development in economically important plants. Nine wheat introgression lines (ILs) harboring germplasm of the Lophopyrum elongatum genome present in the octoploid amphiploid Triticum aestivum cv. Chinese Spring (subgenomes AABBDD) × L. elongatum (genomes EE) were selected from a population of ILs developed earlier. These ILs were employed here in genomic analyses of post-sexual cycle regrowth (PSCR), which is a component of polycarpy in caespitose L. elongatum. Analyses of disomic substitution (DS) lines confirmed that L. elongatum chromosome 4E confers PSCR on wheat. The gene was mapped into a short distal region of L. elongatum arm 4ES and was tentatively named Pscr1. ILs harboring recombined chromosomes with 4ES segments, including ...

Source: TAG. Theoretical and Applied Genetics - June 2, 2020 Category: Genetics & Stem Cells Authors: Abbasi J, Xu J, Dehghani H, Luo MC, Deal KR, McGuire PE, Dvorak J Tags: Theor Appl Genet Source Type: research