Ecophysiological Response to Water Stress and Regulation of Gene Expression for a 9-Cis-Epoxycarotenoid Dioxygenase in Vitis Vinifera L. 'Italia'

Rienzo, Valentina di; Montemurro, Cinzia; Strippoli, G.; Fanelli, Valentina; Giovanni, Claudio De; Antonacci, Donato; Vivaldi, Gaetano Alessandro; Pellegrini, G.; Blanco, Antonio; Camposeo, S.; Miazzi, Monica Marilena

doi:10.17660/actahortic.2015.1082.39

Cited by 2 publications

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“…In the last years, the threats posed by climate change to the wine sector have increased research interest on the effects of such change on grape phenology [10], water management in the vineyards [11][12][13], and diseases development [14][15][16]. These issues gave impetus to projects for collecting, characterizing, and recovering local genotypes and wild relatives as key resources to select and/or develop novel varieties better adapted to changing environmental conditions [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Marginal Grapevine Germplasm from Apulia (Southern Italy) Represents an Unexplored Source of Genetic Diversity

et al. 2020

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The investigation on the genetic diversity of grapevine germplasm is crucial for a more efficient use of grapevine genetic resources in light of changing environmental conditions. Here, we used simple sequence repeats (SSRs) coupled with single nucleotide polymorphism (SNP) markers to disclose grapevine genetic diversity of a collection of Apulian minor/neglected genotypes. Their relationships with national or international cultivars were also examined. Genetic diversity was investigated using 10 SSR markers and 1,178 SNPs generated by genotyping by sequencing (GBS). Based on the SSR data, the 128 genotypes were classified into six main genetic clusters. Twenty-four putative cases of synonymy and 2 of misnamings were detected. Ten “unknown” autochthonous genotypes did not show high similarity to Apulian, national, or international varieties. We took advantage of available GBS-derived SNP data points for only forty genotypes to better investigate the genetic distance among them, identify private SNP alleles, and divergent loci putatively under selection. Based on SNP alleles, two interesting gene pools of minor/neglected Apulian samples were identified. Genetic divergence was investigated by FST and allowed the detection of loci capable of differentiating the gene pools. Overall, this work emphasizes the need for recovering the untapped genetic variability that characterizes minor/neglected grapevine Apulian genotypes and the requirement to preserve and use more efficiently grapevine genetic resources in breeding programs.

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