Seleção precoce em progênies de meios-irmãos em Anonna Squamosa L.

Abstract

Among the species of the Annonaceae family, sugar apple (Annona squamosa) is the most planted and consumed in Brazil, and despite growing interest in the crop, there are no varieties of sugar apple developed for the country's soil and climate conditions. The objective of the present work was to estimate the genetic parameters and predict the genotypic gains in juvenile progenies of A. squamosa half siblings for selection purposes considering the adaptability and temporal stability. Four progenies of half-sibs (UNI-1, UNI-2, UNI-3 and UNI-4) were evaluated in four crops, distributed in the experimental area in a randomized blocks design with three replicates and experimental plot containing five plants. The reproductive traits of the species were evaluated. In general, except for the average length of the flowers, greater environmental effects are observed than the genotypes for the sugar apple progenies evaluated in this study. There was agreement between the HMGV, RPGV and HMRPGV methods for fruit length, mean fruit diameter, fresh fruit mass, bark, seed, number of seeds per fruit, soluble solids, average flower length, flowering period, effective fructification through pollination artificial fruit, pH and titratable acidity, on the discrimination of genotypes with high adaptability and stability, which indicates that they can be part of selective criteria in the routine of the sugar apple breeding programs. All the selected individuals obtained the new mean higher than the mean of the initial population, with genotypes 5 (UNI-1), 47 (UNI-2) and 11 (UNI-3) being prominent, showing promise for obtaining genetic gain through selection. This is the first report on the evaluation of halfsibsprogenies for the species and can be used as the basis for the realization of new cycles of hybridization, as well as to assist in the early selection of superior genotypes.