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Comparative genetic maps reveal extreme crossover localization in the Aegilops speltoides chromosomes.
Theor Appl Genet. 2005 Oct; 111(6):1098-106.TA

Abstract

A total of 137 loci were mapped in Aegilops speltoides, the closest extant relative of the wheat B genome, using two F(2) mapping populations and a set of wheat-Ae. speltoides disomic addition (DA) lines. Comparisons of Ae. speltoides genetic maps with those of Triticum monococcum indicated that Ae. speltoides conserved the gross chromosome structure observed across the tribe Triticeae. A putative inversion involving the short arm of chromosome 2 was detected in Ae. speltoides. A translocation between chromosomes 2 and 6, present in the wheat B genome, was absent. The ligustica/aucheri spike dimorphism behaved as allelic variation at a single locus, which was mapped in the centromeric region of chromosome 3. The genetic length of each chromosome arm was about 50 cM, irrespective of its physical length. Compared to T. monococcum genetic maps, recombination was virtually eliminated from the proximal 50-100 cM and was localized in short distal regions, which were often expanded compared to the T. monococcum maps. The wheat B genome and the genome of Ae. longissima, a close relative of Ae. speltoides, do not show the extreme localization of crossovers observed in Ae. speltoides.

Authors+Show Affiliations

Department of Plant Sciences, University of California, Davis, CA 95616, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

16088396

Citation

Luo, Ming-Cheng, et al. "Comparative Genetic Maps Reveal Extreme Crossover Localization in the Aegilops Speltoides Chromosomes." TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, vol. 111, no. 6, 2005, pp. 1098-106.
Luo MC, Deal KR, Yang ZL, et al. Comparative genetic maps reveal extreme crossover localization in the Aegilops speltoides chromosomes. Theor Appl Genet. 2005;111(6):1098-106.
Luo, M. C., Deal, K. R., Yang, Z. L., & Dvorak, J. (2005). Comparative genetic maps reveal extreme crossover localization in the Aegilops speltoides chromosomes. TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, 111(6), 1098-106.
Luo MC, et al. Comparative Genetic Maps Reveal Extreme Crossover Localization in the Aegilops Speltoides Chromosomes. Theor Appl Genet. 2005;111(6):1098-106. PubMed PMID: 16088396.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparative genetic maps reveal extreme crossover localization in the Aegilops speltoides chromosomes. AU - Luo,Ming-Cheng, AU - Deal,Karin R, AU - Yang,Zu-Li, AU - Dvorak,Jan, Y1 - 2005/10/11/ PY - 2005/05/13/received PY - 2005/06/29/accepted PY - 2005/8/10/pubmed PY - 2006/6/6/medline PY - 2005/8/10/entrez SP - 1098 EP - 106 JF - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JO - Theor Appl Genet VL - 111 IS - 6 N2 - A total of 137 loci were mapped in Aegilops speltoides, the closest extant relative of the wheat B genome, using two F(2) mapping populations and a set of wheat-Ae. speltoides disomic addition (DA) lines. Comparisons of Ae. speltoides genetic maps with those of Triticum monococcum indicated that Ae. speltoides conserved the gross chromosome structure observed across the tribe Triticeae. A putative inversion involving the short arm of chromosome 2 was detected in Ae. speltoides. A translocation between chromosomes 2 and 6, present in the wheat B genome, was absent. The ligustica/aucheri spike dimorphism behaved as allelic variation at a single locus, which was mapped in the centromeric region of chromosome 3. The genetic length of each chromosome arm was about 50 cM, irrespective of its physical length. Compared to T. monococcum genetic maps, recombination was virtually eliminated from the proximal 50-100 cM and was localized in short distal regions, which were often expanded compared to the T. monococcum maps. The wheat B genome and the genome of Ae. longissima, a close relative of Ae. speltoides, do not show the extreme localization of crossovers observed in Ae. speltoides. SN - 0040-5752 UR - https://www.unboundmedicine.com/medline/citation/16088396/Comparative_genetic_maps_reveal_extreme_crossover_localization_in_the_Aegilops_speltoides_chromosomes_ L2 - https://dx.doi.org/10.1007/s00122-005-0035-y DB - PRIME DP - Unbound Medicine ER -