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Accueil du site → Doctorat → Pays-Bas → < 2000 → The use of crop growth simulation in evaluation of large germplasm collections : distribution, variation and evaluation of Syrian durum wheat landraces

Wageningen Universiteit (1992)

The use of crop growth simulation in evaluation of large germplasm collections : distribution, variation and evaluation of Syrian durum wheat landraces

Elings, A.

Titre : The use of crop growth simulation in evaluation of large germplasm collections : distribution, variation and evaluation of Syrian durum wheat landraces

Auteur : Elings, A.

Université de soutenance : Wageningen Universiteit

Grade : PhD thesis 1992

Présentation
Evaluation results have often limited applicability, due to the considerable genotype x environment interaction. Extensive multilocational or multiseasonal evaluation would be needed to assess plant characteristics, but this expensive procedure can often not be applied to large germplasm collections. Moreover, extensive evaluations may still not lead to unequivocal results. Therefore, an efficient method is developed that allows the assessment of plant characteristics of large numbers of accessions under various environmental conditions, utilizing a limited amount of evaluation results.
A total of 185 landrace populations of durum wheat [ Triticumturgidum L. var. durum (Desf.) MK] was collected in the Syrian Arab Republic in 1987 and 1988. During the collection missions, attention was paid to recording passport and collection information, and providing an agro-ecological description of each site. Farmers were asked for information on the landraces and their farm management practices.
Grouping of the 166 collection sites, based on four climatological variables, resulted in 14 relatively homogeneous regions of origin with respect to agro-ecological characteristics. Fifty-nine populations had their putative origin at or in the vicinity of their collection sites, and were considered representative for the respective environments.
A brief morphological description was given of the landrace groups as distinguished by farmers. Each group has distinct morphological characteristics, and is referred to by a local name that is often derived from a striking character or supposed origin. Some landrace groups are widely distributed over most of the country, whereas most others are regionally concentrated, either in a limited region or a few villages.

Mots clés : growth / crops / computer simulation / simulation / simulation models / gene banks / genetic resources / germplasm / resource conservation / plant genetic resources

Résumé de la thèse

Version intégrale

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