NDLI: A microcolinearity study at the earliness per se gene Eps-A m 1 region reveals an ancient duplication that preceded the wheat

Content Provider	Springer Nature Link
Author	Valárik, M. Linkiewicz, A. M. Dubcovsky, J.
Copyright Year	2006
Abstract	Wheat flowering is controlled by numerous genes, which respond to environmental signals such as photoperiod and vernalization. Earliness per se (Eps) genes control flowering time independently of these environmental cues and are responsible for the fine tuning of flowering time. We recently mapped the Eps-A m 1 gene on the end of Triticum monococcum chromosome arm 1AmL. As a part of our efforts to clone Eps-A m 1 we developed PCR markers flanking this gene within a 2.7 cM interval. We screened more than one thousand gametes with these markers and identified 27 lines with recombination between them. Recombinant lines were used to generate a high-density map and to investigate the microcolinearity between wheat and rice in this region. We mapped ten genes from a 149 kb region located at the distal part of rice chromosome 5 (cdo393 – Ndk3) on a 3.7 cM region on wheat chromosome one. This region is part of an ancient duplication between rice chromosomes 5 and 1. Genes present in both rice chromosomes were less similar to each other than to the closest wheat orthologues, suggesting that this duplication preceded the divergence between wheat and rice. This hypothesis was supported by the presence of 18 loci duplicated both in rice chromosomes 5 and 1 and in the colinear wheat chromosomes from homoeologous groups 1 and 3. Independent gene deletions in wheat and rice lineages explain the alternations of colinearity between rice chromosome 5 and wheat chromosomes 1 and 3. Colinearity between the end of rice chromosome 5 and wheat chromosome 1 was also interrupted by a small inversion, and several non-colinear genes. These results suggest that the distal region of the long arm of wheat chromosome 1 was involved in numerous changes that differentiated wheat and rice genomes. This comparative study provided sufficient markers to saturate the Eps-A m 1 gene region and to precisely map this gene within a 0.9 cM interval flanked by the VatpC and Smp loci.
Starting Page	945
Ending Page	957
Page Count	13
File Format	PDF
ISSN	00405752
Journal	Theoretical and Applied Genetics
Volume Number	112
Issue Number	5
e-ISSN	14322242
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-01-24
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Flowering time Earliness per se Wheat Rice Duplication Microcolinearity Biotechnology Biochemistry Plant Biochemistry Plant Sciences Agriculture Plant Genetics & Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Biotechnology Agronomy and Crop Science

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A microcolinearity study at the earliness per se gene Eps-Am1 region reveals an ancient duplication that preceded the wheat–rice divergence

Control of flowering time and spike development in cereals: the earliness per se Eps-1 region in wheat, rice, and Brachypodium

Validation of a 1DL earliness per se (eps) flowering QTL in bread wheat (Triticum aestivum)

Control of flowering time and spike development in cereals: the earliness per se Eps-1 region in wheat, rice, and Brachypodium

High-density mapping of the earliness per se-3A$^{m}$ (Eps-3A $^{ m }$) locus in diploid einkorn wheat and its relation to the syntenic regions in rice and Brachypodium distachyon L.

Validation of a 1DL earliness per se (eps) flowering QTL in bread wheat (Triticum aestivum)

Genetic and physical mapping of the earliness per se locus Eps-A m 1 in Triticum monococcum identifies EARLY FLOWERING 3 (ELF3) as a candidate gene

Erratum to: Control of flowering time and spike development in cereals: the earliness per se Eps-1 region in wheat, rice, and Brachypodium

Validation of a 1DL earliness per se (eps) flowering QTL in bread wheat (Triticum aestivum)

A microcolinearity study at the earliness per se gene Eps-A m 1 region reveals an ancient duplication that preceded the wheat–rice divergence

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