Correlation of growth and biomass yield traits in inter-specific hybrids between Jatropha curcas and J. integerrima
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Abstract
Growth traits might be used in selection for biomass yield of hybrid Jatropha. The objectives of this research were to 1) evaluate the effect of crosses to growth and biomass yield and 2) investigate the relationships between growth and biomass yield traits of inter-specific hybrids of Jatropha. Total 16 crosses of inter-specific hybrids between J. curcas and J. integerrima were evaluated under the field condition during year 2015 - 2017. Data were collected on growth and biomass yield traits during each year cycle. Effect of crosses was found on growth and biomass yield traits of hybrid for both of after planting and after pruning. The correlation coefficients between biomass yield with size of stem, branch, and canopy were positive and highly significant (r = 0.31** to 0.84**). This finding suggest that size of stem, branch, and canopy could be used as indirect selection for high biomass yield of hybrid Jatropha. Moreover, there were significant and negative relationships between moisture content of wood and size of stem, branch, and canopy and biomass yield (r = -0.22** to -0.58**) suggesting that breeding of hybrid Jatropha for well growth, high biomass yield, and low moisture content of wood could be done.
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References
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