Simultaneous selection in progenies of yellow passion fruit using selection indices

Revista Ceres

Luciana Domiciano Silva Rosado²  Carlos Eduardo Magalhães Dos Santos¹  Claudio Horst Bruckner¹  Endson Santana Nunes¹  Cosme Damião Cruz¹ 

[1] ,Universidade Federal de Viçosa Departamento de Fitotecnia Viçosa MG ,Brazil

关键词: Passiflora edulis Sims;    multivariate analysis;    genetic gains in plant breeding;    Passiflora edulis Sims;    análise multivariada;    ganhos genéticos;    melhoramento vegetal;   

DOI  :  10.1590/S0034-737X2012000100014

来源: SciELO

【 摘 要 】

This study aimed to evaluate the efficiency of simultaneous selection (selection indices) using estimated genetic gains in yellow passion fruit and to make a comparison between the methodologies of Mulamba & Mock and Elston. The study was conducted with 26 sib progenies of yellow passion fruit for intrinsic production characteristics including fruit number, fruit mass, fruit length and diameter, and for the fruit characteristics skin thickness, soluble solids and acidity. Two methodologies were applied: first, in the joint analysis of fruit characteristics and of intrinsic production characteristics in a single phase of selection; and second, in the analysis in two phases, in which priority was given to the intrinsic production characteristics in the first phase, and later, in the second phase, the best fruit characteristics were chosen among the progenies of the first phase. The analysis of variance was applied to the data to detect genetic variability among progenies. The Elston's selection indice was unable to provide distribution of genetic gains consistent with the purposes of the study, as it selected a single progeny of passion fruit. However, the index based on the sum of ranks of Mulamba & Mock was more suitable, as it provided a balanced distribution of gains, selecting a larger number of progenies. The methodology of selection using indices is advantageous in passion fruit, since it contributes to higher genetic gains for all the traits evaluated, and the selection in a single phase was proved efficient for progeny selection.

【 授权许可】

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