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Molecular Genotyping (SSR) and Agronomic Phenotyping for Utilization of Durum Wheat (Triticum durum Desf.) Ex Situ Collection from Southern Italy: A Combined Approach Including Pedigreed Varieties.


ABSTRACT: In South Italy durum wheat (Triticum durum Desf.) has a long-time tradition of growing and breeding. Accessions collected and now preserved ex situ are a valuable genetic resource, but their effective use in agriculture and breeding programs remains very low. In this study, a small number (44) of simple sequence repeats (SSR) molecular markers were used to detect pattern of diversity for 136 accessions collected in South Italy over time, to identify the genepool of origin, and establish similarities with 28 Italian varieties with known pedigree grown in Italy over the same time-period. Phenotyping was conducted for 12 morphophysiological characters of agronomic interest. Based on discriminant analysis of principal components (DAPC) and STRUCTURE analysis six groups were identified, the assignment of varieties reflected the genetic basis and breeding strategies involved in their development. Some "old" varieties grown today are the result of evolution through natural hybridization and conservative pure line selection. A small number of molecular markers and little phenotyping coupled with powerful statistical analysis and comparison to pedigreed varieties can provide enough information on the genetic structure of durum wheat germplasm for a quick screening of the germplasm collection able to identify accessions for breeding or introduction in low input agriculture.

SUBMITTER: Marzario S 

PROVIDER: S-EPMC6211131 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Molecular Genotyping (SSR) and Agronomic Phenotyping for Utilization of Durum Wheat (<i>Triticum durum</i> Desf.) Ex Situ Collection from Southern Italy: A Combined Approach Including Pedigreed Varieties.

Marzario Stefania S   Logozzo Giuseppina G   David Jacques L JL   Zeuli Pierluigi Spagnoletti PS   Gioia Tania T  

Genes 20180920 10


In South Italy durum wheat (<i>Triticum durum</i> Desf.) has a long-time tradition of growing and breeding. Accessions collected and now preserved ex situ are a valuable genetic resource, but their effective use in agriculture and breeding programs remains very low. In this study, a small number (44) of simple sequence repeats (SSR) molecular markers were used to detect pattern of diversity for 136 accessions collected in South Italy over time, to identify the genepool of origin, and establish s  ...[more]

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