Genetic parameters, path analysis and indirect selection of agronomic traits of cassava germplasm

AUTOR(ES)

DINIZ, RAFAEL P.

FONTE

An. Acad. Bras. Ciênc.

DATA DE PUBLICAÇÃO

19/08/2019

RESUMO

Abstract: This study aimed to estimate genetic parameters and correlations between morphological, agronomic and root quality traits of cassava plants, as well as to study cause and effect relationships through path analysis. A total of 814 genotypes were evaluated from 2011 to 2015. The joint analysis of the data was performed by the mixed models approach. The predicted genetic values of the genotypes were used to estimate the genetic correlations among as well the path analysis. The estimates of heritability of the genotype means ranged from 0.31 (commercial fresh root yield – CRY) to 0.62 (plant height - PLH). The highest genetic correlation coefficient estimates were observed for starch yield (STY) × total fresh root yield (FRY) (0.97). The results of the path analysis showed that FRY had the highest direct effect on STY, but the indirect selection based on FRY was not efficient to improve the gain of STY.

Documentos Relacionados

• Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle
• Genetic parameters, adaptability and stability to selection of yellow passion fruit hybrids
• Genetic divergence in sweet cassava cultivars using morphological agronomic traits and RAPD molecular markers
• Correlations between agronomic traits and path analysis for silage production in maize hybrids
• Estimates of genetic parameters of pigments and agronomic traits in green and purple lettuce