Estimates of genetic parameters for physic nut traits based in the germplasm two years evaluation

Ciência Rural

Bruno Galvêas Laviola²  Alexandre Alonso Alves²  Fábio De Lima Gurgel¹  Tatiana Barbosa Rosado²  Rodrigo Barros Rocha¹  Julio Cesar Albrecht¹ 

[1] ,Empresa Brasileira de Pesquisa AgropecuáriaBrasília DF ,Brasil

关键词: Jatropha curcas;    plant breeding;    quantitative genetic;    Jatropha curcas L.;    melhoramento de plantas;    genética quantitativa;   

DOI  :  10.1590/S0103-84782012000300008

来源: SciELO

【 摘 要 】

In spite of increasingly widespread interest in planting physic nut, breeding efforts are still in its infancy. In that context, an important resource recently established aiming future breeding efforts was the assembly of a germplasm bank with near 200 accessions. The objective of this study was to estimate genetic parameters, repeatibility coefficients and genetic correlation between seven traits, measured in 110 accessions (half sib families) of this germplasm bank in different stages of development. The results show that higher relative values of additive variance were only found for yield and height, and the existence of low environmental variation (either of temporary or permanent nature) among plots within blocks. Given the high repeatibility values found for all traits, on average three measurements are necessary to predict, accurately and efficiently, the true breeding value of an individual. Based on the results of genetic correlations, breeding effort should initially be use track trees with increased stem diameter, elevated number of branches and canopy volume so as to increase the chances of finding an exceptionally highly productive tree.

【 授权许可】

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