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Revista Brasileira de Fruticultura

versão impressa ISSN 0100-2945

Resumo

BRUNA, Emilio Della; MORETO, Alexsander Luís  e  DALBO, Marco Antonio. Repeatability in the selection of clones of peach for the south coastal region of the state of Santa Catarina, Brazil. Rev. Bras. Frutic. [online]. 2012, vol.34, n.1, pp.206-215. ISSN 0100-2945.  https://doi.org/10.1590/S0100-29452012000100028.

The aim of the present study was estimate the coefficients of repeatability for productive features in peach, in addition to identify and select promising clones for the south coastal region of the State of Santa Catarina, Brazil. Hybrid plants that showed good adaptation to the climate, production, size, flavor and firmness of fruit were selected. These selections were then grafted on Okinawa rootstock and planted in the year 2005 in three different locations: 1 - Experimental Station of Urussanga, at 40 meters of altitude; 2 - Grower's orchard, at 200 meters of altitude; 3 - Grower's orchard, at 350 meters of altitude. The seedling were planted in a spacing of 6 x 1 meters and conducted in V system. Evaluations were carried out during the years 2007 and 2008. Variance components were estimated by Restricted Maximum Likelihood (REML), and the prediction of phenotypic and genotypic values by Best Linear Unbiased Prediction (BLUP), using the software Selegen-REML/BLUP. All productive features showed considerable genetic variability, with the estimations of repeatability coefficient (r) ranging from medium to high magnitude (0.54 to 0.74) for mean fruit weight (MMF), and from low to medium magnitude (0.22 to 0.39) for the number of fruits per plant (PTF). Clones 1770 and 1443 showed a good performance on average across all sites, while clones 0470 and 1307 performed better in site 1, clone 1444 in site 2, clones 0740 and 0926 in site 3, clone 1770 in sites 1 and 2.

Palavras-chave : peach; plant breeding; coefficients of repeatability; Reml/Blup.

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