Clonal preselection of grapevine cultivars of the appellation "Cangas Quality Wine" (Asturias, Spain)

Abstract

Loureiro M.D., Moreno-Sanz P., Suárez B., 2011. Clonal preselection of grapevine cultivars of the appellation "Cangas Quality Wine" (Asturias, Spain). Hort. Sci. (Prague), 38: 71-80.The Asturian vineyard is composed mostly of autochthonous minority cultivars only present in the northwest of Spain. This vineyard is characterized by its antiquity, confusion as to the identity of certain cultivars, lack of certified plant material, and a great number of mixed cultivars in each individual vineyard. With the aim of restoring this viticulture after years of abandonment and improving the quality of its wines, old plants belonging to four red grapevine cultivars (Albarín tinto, Carrasquín, Verdejo tinto, and Mencía) presenting a good sanitary state and adequate yield were selected for clonal preselection. Agronomic and enological data were collected over three years. Those plants exhibiting above average values of probable alcohol content and yield for their respective vineyards were tested for viruses so as to discard unhealthy individuals. Six loci microsatellites were analysed to verify the identity of the selected plants. A final number of 62 clones belonging to these cultivars were selected for planting in a plot for their subsequent study under homogeneous conditions.

Ampelographic identification and comparison of some table grape (Vitis viniferaL.) clones

“…Scalabrelli et al (2004), Zulini et al (2005), Loureiro et al (2011) and Dimovska et al (2012) obtained similar results with different grape clones.…”

“…Clonal selection takes advantage of the genetic variability within cultivars and their health status. Genetic variability within cultivars may be explained by their polyclonal origin and the progressive accumulation of genetic mutations over time (Rives 1961;Ulanovsky et al 2002;Sefc et al 2009;Loureiro et al 2011). Clonal selection studies have been carried out with different grape cultivars and rootstocks to choose productive, high-quality, high-health clones.…”

Viticultural and chemical characteristics of Muscat Hamburg preselected clones grown for table grapes

“…The selection of superior grapevines and their propagation has been widely adopted for decades around the world. Various trials have been conducted to identify rare cultivars, intravarietal genetic variability, virus‐ and disease‐resistant vines, vines tolerant to cold temperatures and a range of studies that included improved vigour, yield parameters, chemical and sensory properties of grapes and wines, just to mention a few. For instance, in France, the clonal selection of Muscat Hamburg resulted in commercially propagated N clones Nos.…”

The clone selection studies on Siyah Gemre grape variety

“…The healthy and more interesting clones are then selected attempting to maintain intravariability as far as possible. These clones are planted under homogeneous conditions to study their capacity to produce a quality grape with the aim of certifying and subsequently distributing these clones to grape growers [4].…”