Heritability and Correlation among Sugarcane (<i>Saccharum</i> spp.) Yield and Some Agronomic and Sugar Quality Traits in Ethiopia

Abstract

To assess broad sense heritability and phenotypic and genetic correlations among sugarcane yield components, an experiment was conducted at Wonji and Metehara Sugar Estates of Sugar Corporation of Ethiopia during 2012/2013. High broad sense heritability (h 2 ) was detected for stalk diameter (0.730), single cane weight (0.672), millable cane number (0.624), stalk height (0.624) and pol % (0.608), indicating that these traits could be selected for easily. Expected genetic gain of the yield components was moderate to high. All traits had low to high genetic correlations (rg = −0.005 to 0.884) with cane yield and (rg = 0.027 to 0.999) with sugar yield. On average genetic correlations were higher than phenotypic correlations. High Genotypic Coefficient of Variation (GCV), broad sense heritability and expected genetic advance were recorded for stalk diameter, single cane weight and millable cane number. A selection strategy based on these traits could lead to improvement in cane and sugar yield.

Study of Genetic Variability among Midlate Maturing Sugarcane Clones for Different Yield and Juice Quality Traits under Waterlogged Condition

“…Similar result were also reported by Tena et al, (2016), They found high broad sense heritability for stalk diameter, single cane weight, millable cane weight, stalk height and pol %. Gowda et al, (2016) reported that cane yield components viz., sugar yield number of millable cane, single cane weight and cane yield showed high heritability but Their result is slightly different for plant height, stalk diameter, brix percentage pol percentage, purity percentage and CCS percentage, This different might be due to environmental variations in expression of these traits.…”

Saccharum×Miscanthusintergeneric hybrids (miscanes) exhibit greater chilling tolerance of C4photosynthesis and postchilling recovery than sugarcane (Saccharumspp. hybrids)

“…Variance components were estimated for each of the sources of variation in the model. Broad-sense heritability (H 2 ) on an individual plant basis was calculated using the variance components based on following the equation (Gusmini & Wehner, 2004;Tena, Mekbib, & Ayana, 2016):…”

“…Variance components were estimated for each of the sources of variation in the model. Broad‐sense heritability ( H 2 ) on an individual plant basis was calculated using the variance components based on following the equation (Gusmini & Wehner, ; Tena, Mekbib, & Ayana, ):where is the total genetic variance, is the total phenotypic variance, and is the environmental variance. In this case, represents the variation among miscane progeny genotypes, and represents the interaction between genotype and block.…”

Character Association among Cane Yield and their Component Traits in Sugarcane under Waterlogged Condition

“…Chandrakant (2007) revealed that number of shoots at 120 DAP, number of millable cane at harvest and single cane weight were had consistent trend of significant association with cane yield. Kang et al, (1983), Sreekumar et al, (1994), Tena et al, (2016), Thangavelu (2011) and Thippeswamy et al, (2003).…”

“…Sanghera et al, (2015) reported significant and positive correlation of cane yield with number of millable cane at 10 months, stalk length, single cane weight, cane diameter and germination percentage at 45 DAP indicating the importance of these traits to be involved in selection criteria. Tena et al, (2016) reported that cane yield showed strong positive and highly significant correlation with number of millable cane, single cane weight, stalk height and sugar yield. Tadesse et al, (2014) found that cane yield was positively and highly significantly correlated with single cane weight and number of millable cane while positive and significantly correlated with cane diameter.…”