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Genetic linkage facilitates cloning of Ert-m regulating plant architecture in barley and identified a strong candidate of Ant1 involved in anthocyanin biosynthesis.

Abstract：

:The erectoides-m anthocyanin-less 1 (ert-m ant1) double mutants are among the very few examples of induced double mutants in barley. From phenotypic observations of mutant plants it is known that the Ert-m gene product regulates plant architecture whereas the Ant1 gene product is involved in anthocyanin biosynthesis. We used a near-isogenic line of the cultivar Bowman, BW316 (ert-m.34), to create four F2-mapping populations by crosses to the barley cultivars Barke, Morex, Bowman and Quench. We phenotyped and genotyped 460 plants, allowing the ert-m mutation to be mapped to an interval of 4.7 cM on the short arm of barley chromosome 7H. Bioinformatic searches identified 21 candidate gene models in the mapped region. One gene was orthologous to a regulator of Arabidopsis thaliana plant architecture, ERECTA, encoding a leucine-rich repeat receptor-like kinase. Sequencing of HvERECTA in barley ert-m mutant accessions identified severe DNA changes in 15 mutants, including full gene deletions in ert-m.40 and ert-m.64. Both deletions, additionally causing anthocyanin deficiency, were found to stretch over a large region including two putative candidate genes for the anthocyanin biosynthesis locus Ant1. Analyses of ert-m and ant1 single- and double-deletion mutants suggest Ant1 as a closely linked gene encoding a R2R3 myeloblastosis transcription factor.

journal_name

Plant Mol Biol

journal_title

Plant molecular biology

authors

Zakhrabekova S,Dockter C,Ahmann K,Braumann I,Gough SP,Wendt T,Lundqvist U,Mascher M,Stein N,Hansson M

doi

10.1007/s11103-015-0350-x

subject

Has Abstract

pub_date

2015-08-01 00:00:00

pages

609-26

issue

6

eissn

0167-4412

issn

1573-5028

journal_volume

88

pub_type

杂志文章

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