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MULTIVARIATE ANALYSIS OF GENETIC DIVERSITY OF PEACH AND NECTARINE CULTIVARS

Article number
465_36
Pages
285 – 292
Language
Abstract
In breeding programs, satisfactory results are rapid and easily obtained when in the base population a great genetic variability is combined with a high average for the character to be selected.
Genetic diversity among 26 peach cultivars (Tropical, Régis, Centenário, Premier, Marli, Aurora 1, Aurora 2, Relíquia, Setembrino, Alô Doçura, Maravilha, Okinawa, Cristal, Talismã, Ouro Mel, Colibri, Pérola de Itaquera, Real, Biuti, Lake City, Campinas 1, UFV 186, UFV 286, Rei da Conserva, Bolão and Flordasun) and three nectarine cultivars (Sunred, Centenária and Josefina) was analysed through multivariate technics (principal components and standart media Euclidean distance), with the aim to identify promising parents for a breeding program.
The cultivars Tropical, Régis, Sunred, Centenário, Premier, Aurora 1, Josefina, Setembrino, Alô Doçura, Maravilha, Real, Campinas 1 and Rei da Conserva were considered as elite due to the superiority of their phenological characteristics and fruit quality.
Through principal component analysis and Tocher’s method of grouping, based on standard Euclidean distance, it was possible to identify a consistently similar group (Real, Josefina, Aurora 1, Premier, Setembrino and Régis) and two pairs of consistently divergent cultivars (Rei da Conserva and Sunred, Rei da Conserva and Tropical). These divergent cultivars are promising parents for crossing, because of the great genetic variability in a segregant population derived from the genetic divergence between their parents.

Publication
IV International Peach Symposium
Authors
A.S. Albuquerque, C.H. Bruckner, C.D. Cruz, L.C.C. Salomão
Keywords
Prunus persica, genetic diversity, multivariate analysis, breeding
Full text
https://doi.org/10.17660/ActaHortic.1998.465.36
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