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Durum wheat (Triticum durum Desf.) Mediterranean landraces as sources of variability for allelic combinations at Glu-1/Glu-3 loci affecting gluten strength and pasta cooking quality

Autor: Ryuman, N.
Autor: Peña, R.J.
Autor: Ammar, K.
Autor: Villegas, D.
Autor: Crossa, J.
Autor: Royo, C.
Año: 2014
ISSN: 0925-9864
ISSN: 1573-5109
Descripción: Gluten Quality
Descripción: Glutenin Subunits
Descripción: Lmw Models
Descripción: Mediterranean Landraces
Descripción: Triticum Durum
Resumen: With the aim of identifying durum wheat landraces (LR) with a potential use in breeding programs for gluten strength enhancement, the allelic combinations present at five glutenin loci were determined in a collection of 155 LR from 21 Mediterranean countries. A set of 18 modern cultivars (MC) was used for comparison. Gluten strength was determined by SDS-sedimentation test on grain samples from field experiments conducted during 3 years. A total number of 131 different allelic/banding pattern combinations were found. Taking together high (HMW-) and low (LMW-) molecular weight glutenin subunit loci resulted in 126 combinations in LR, but only nine in MC, which are characterized for having strong gluten. Two LMW-2 type models were identified in the collection and LMW-1 types were absent. LMW-2 was present in 78 % of MC, including the only three with outstanding gluten strength (Ocotillo, Claudio and Meridiano), while 14 % of the LR had LMW-2 and 6 % LMW-2−. In the LR a known combination LMW-2 (aaa) and three new ones had a positive effect on the gluten strength. LMW-2 models were found in high frequency in LR from Italy and the three Maghreb countries; from medium to low frequencies in genotypes from Turkey, Jordan, Lebanon, Portugal and Spain, and were absent in the remaining countries. The large variability found in LR proved their potential value in breeding to broaden the genetic basis of gluten quality improvement. Genotypes interesting for breeding purposes are identified.
Lenguaje: English
Editor: Springer Nature
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Tipo: Article
Lugar: Netherlands
Paginas: 1219-1236
No de Revista: 6
Revista: Genetic Resources and Crop Evolution
Volumen de la Revista: 61
DOI: 10.1007/s10722-014-0104-7

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Este ítem aparece en la(s) siguiente(s) colección(ones)

  • Genetic Resources
    Genetic Resources including germplasm collections, wild relatives, genotyping, genomics, and IP
  • Wheat
    Wheat - breeding, phytopathology, physiology, quality, biotech

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