Allelic variation and geographical patterns of prolamins in the USDA-ARS Khorosan wheat germplasm collection

Rodriguez de Quijano Urquiaga, Marta and Lucas, Regina and Ruiz Valcárcel, Magdalena and Giraldo Carbajo, Patricia and Espí Plaza, Araceli and Carrillo Becerril, Jose Maria (2010). Allelic variation and geographical patterns of prolamins in the USDA-ARS Khorosan wheat germplasm collection. "Crop Science", v. 50 (n. 6); pp. 2383-2391. ISSN 0011-183X.

Description

Title: Allelic variation and geographical patterns of prolamins in the USDA-ARS Khorosan wheat germplasm collection
Author/s:
  • Rodriguez de Quijano Urquiaga, Marta
  • Lucas, Regina
  • Ruiz Valcárcel, Magdalena
  • Giraldo Carbajo, Patricia
  • Espí Plaza, Araceli
  • Carrillo Becerril, Jose Maria
Item Type: Article
Título de Revista/Publicación: Crop Science
Date: November 2010
ISSN: 0011-183X
Volume: 50
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Biotecnologia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Khorasan wheat, Triticum turgidum ssp. turanicum (Jakubz), is an ancient cultivated wheat possessing several characteristics that may be useful for durum wheat improvement. In this paper, the allelic variation of prolamins, principal determinants of pasta quality, has been studied in 77 accessions from the USDA-ARS germplasm collection. Some prolamin subunits difficult to identify by standard electrophoretic methods were analyzed by molecular and proteomic techniques. These analyses allowed identifying unambiguously the subunits combination HMW-GS 7+16 (usually mistaken for 13+16) and the 13+8 (HMW-GS) not found so far in wheat. In total, 22 different genotypes were found for the entries from 21 countries analyzed. Prolamin alleles related to good quality in durum wheat have been identified. Also, new allelic variants were identified at almost all the loci, providing a new source of genetic variability with a potential use in breeding. Two geographical distribution patterns of prolamin alleles, with contrasting differences in pasta quality, were detected: one for the Southwest of Asia, and other for the Mediterranean zone. Seven accessions, mainly from Ethiopia and not included in any of those two groups, were rather unique. The results obtained in this study can help to select breeding material and in a more efficient use of the collection.

More information

Item ID: 8465
DC Identifier: http://oa.upm.es/8465/
OAI Identifier: oai:oa.upm.es:8465
Official URL: https://www.crops.org/publications/cs/abstracts/50/6/2383
Deposited by: Memoria Investigacion
Deposited on: 14 Mar 2013 07:44
Last Modified: 22 Sep 2014 10:34
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