A multivariate approach for the ampelographic characterizations of Algerian grapevine genotypes (Vitis vinifera L.): Insights into conservation and commercialization

Abstract

This study was conducted in three vegetation successive periods (2015, 2016, and 2017) to determine ampelographic characteristics of the 36 grapevine varieties grown in the Eastern Algerian germplasm collection by a total of 108 ampelographic criteria using OIV descriptors. The data were processed by multivariate statistical procedures. A number of factors have been well identified in the classification of grape varieties studied, some are quantitative in particular the length of veins from N1 to N5 (OIV601, OIV602, OIV603, OIV604, OIV611), length of petiole sinus to upper and lower lateral leaf sinus (OIV605, OIV606) and fruit production represented by the bunch size (OIV202, OIV203) and weight (OIV502), while the qualitative parameters related mainly to the density of hairs for the young shoot (OIV004), density of prostrate and erect hairs on and between main veins on lower side of blade young leaf (OIV053, OIV054, OIV055, OIV056, respectively) and density of prostrate hairs between the main veins on lower side of blade mature leaf (OIV084). The results obtained by all parameters together confirmed the synonymy between varieties already found previously by molecular SSR markers in particular between both varieties as Bouaber des Aures, Kabyle Aldebert; Ahmar Mechtras II, Ahmar Mechtras III; Farana Blanc, Farana de Mascara; Aneb Kabyle, Ahmed draa Mizen and between three cultivars Lekhzine, Ahchichene, Adari des Bibans. However, the problem of synonymy remains invalid between Louali and El wali, despite the close convergence between them, especially in ampelographic quantitative measured criteria.