Estimates of genetic parameters, genetic variability, and selection in the S1 generation of peach.

The growing of peach in mild winter regions is made viable through the use of genotypes that have low need for cold conditions, and this is one of the main aims of breeding for these regions. Thus, the aims of this study were to estimate genetic parameters, evaluate genetic variability, and select families adapted to mild winter regions in the S1 generation of peach through mixed model methodology (REML/BLUP). For that purpose, 22 populations, 84 families, and 2090 individuals were evaluated for the following traits: bud burst rate (BR), node density (ND), plant height (PH), and trunk diameter (TD). Genetic variability was found for all the traits. Individual heritability in the broad sense was of low and medium magnitudes. The PH trait had positive genotypic correlation of high magnitude with TD. The ND trait had moderate negative genotypic correlation with PH and TD. Clustering by the Tocher method resulted in the formation of six mutually exclusive groups. Considering selection intensity of 25%, simultaneous selection for BR, ND, and TD led to predicted gains of 11.3% for BR, 9.7% for ND, -14.2% for PH, and -14.3% for TD, showing the great potential of the germplasm evaluated.

Bibliographic Details

Main Authors:	SILVA, J. O. da C. e, BRUCKNER, C. H., CARNEIRO, P. C. S., RESENDE, M. D. V. de, ALVES, R. S., SILVA, D. F. P. da
Other Authors:	JOSÉ OSMAR DA COSTA E SILVA, UFV; CLAUDIO HORST BRUCKNER, UFV; PEDRO CRESCÊNCIO SOUZA CARNEIRO, UFV; MARCOS DEON VILELA DE RESENDE, CNPCa; RODRIGO SILVA ALVES, UFV; DANIELLE FABÍOLA PEREIRA DA SILVA, UFG.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	2021-01-27
Subjects:	Prunus Persica, Melhoramento Vegetal, Fruta, Pêssego, Fruit trees, Plant breeding, Peaches,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129623 https://doi.org/10.1590/0103-8478cr20190976
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