Correlation of Traits on Sugarcane (Saccharum Spp) Genotypes at Metahara Sugar Estate (original) (raw)
Related papers
American Journal of Plant Sciences, 2016
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.
American Journal of Plant Sciences, 2016
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.
2022
The aim of the study was to evaluate ten introduced sugarcane genotypes for yield and juice quality in three successive crop cycles at Finchaa Sugar Estate, Ethiopia. Eight sugarcane genotypes were grown from December 2016 to May 2020 laid in a CRBD with three replications. Data were collected for number of internodes, millable stalk, plant height, stalk girth, single cane weight, cane yield, brix percent juice, pol percent, and sugar recovery percentage and sugar yield. The collected data was subjected to analysis of variance with the help of statistical analysis system software and treatment means were separated using least significance difference method at 5% level of significance. Analysis of variance for the three crop cycles indicated the existence of variation between genotypes in all quantitative traits. In the mean comparisons of traits for the three crop cycles, the genotype CP 96 12 52 had the highest number of millable stalks and VMC 96 273 and MPT 96 035 produced the highest cane thickness and single stalk weights. Considering sugar yield the best sugarcane genotypes were N 14, CP 96 1252, CPCL 02 926 and VMC 96 89 respectively. N 14 was the highest performed variety in cane and sugar yield, but its sugar recovery percent performance was very low (10.32%). However, CP 96 1252, CPCL 02 926 and VMC 96 89 had the highest sugar recovery percentage 12.93%, 14% and 12.15% respectively and had been recommended for timely seed increase for verification in large plots at Finchaa Sugar Estate.
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 (h2) 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.
Correlation Studies of Agronomic Traits for Higher Sugar Yield in Sugarcane
2012
Twelve sugarcane clones were used in this study. The analysis of variance revealed significant differences among genotypes for all the plant characters. Highest cane yield (144 t/ha) was recorded in clone NIA82-1026P5 and highest Pol % (20.82) and CCS % (16.45) were observed in CP84-1198. Correlation coefficient results indicated that cane yield was positively correlated with cane girth, weight per stool, sugar yield, tiller numbers and purity % whereas Pol % and CCS % showed negative correlation with cane yield. Sugar yield showed non significant correlation with cane girth.
GENETIC VARIABILITY OF TRAITS FOR SUGARCANE (SACCHARUM SPP) GENOTYPES AT METAHARA SUGAR ESTATE
Research Article, 2018
This study was done with the objective of evaluating eleven newly introduced sugarcane genotypes from CIRAD in France along with three standard checks to investigate the genetic and phenotypic variability among traits under heavy, medium and light soil types of Metahra Sugar Estate. The trail was laid out in randomized complete block design with three replications. Data were collected for cane sprouting, tillering, height, girth, number of millable cane, cane yield, sugar percent cane and sugar yield. The results showed that the differences between PCV and GCV were small under the three soil types for most of the traits which indicated a high contribution of genotypic factor to the phenotypic performance and a low influence of the environment on these traits, suggesting higher gains from selection.
Correlation and Path Coefficient Analyses in Sugarcane Genotypes of Ethiopia
To study the relations of certain morphological and sugar quality characters with sugarcane yield, an experiment was conducted at Wonji and Metehara Sugar Estates, Ethiopia between March 2012 and October 2013. The experiment, comprising of 400 sugarcane genotypes of which 174 were local that were collected from different regional states of Ethiopia and 226 introduced, was laid out in partial balanced lattice design with two replications. Data was collected on cane yield and its components, sugar yield and sugar quality traits. ANOVA, correlation and path coefficient analysis were done. Analysis of variance revealed significant differences (P < 0.01) for all the characters studied. Cane yield showed strong positive and highly significant (P < 0.01) correlation with milla-ble cane number (r = 0.832), single cane weight (r = 0.528), stalk height (r = 0.517) and sugar yield (r = 0.987). There was also positive significant (P = 0.05) correlation of tiller count and cane diameter with cane yield. Path analysis revealed the highest positive direct effect of millable cane number (0.812) on cane yield followed by single cane weight (0.682) and pol percent (0.550). However, stalk diameter and brix percent had considerable negative direct effects and indirect positive effects through single cane weight on cane yield. Therefore, in view of their significant positive association with cane yield, indirect effects of stalk diameter and brix percent via single cane weight should be considered during selection. Genotypes should be selected on the basis of millable cane number, single cane weight and pol percent for getting higher cane and sugar yield.
2023
This study was conducted to assess the extent of morphological variation, cluster the genotypes into relatively homogenous groups and to identify the major characters contributing to the overall diversity of 22 exotic sugarcane genotypes at Finchaa Sugar Estate. The experimental design used was RCBD laid in three replications. Quantitative traits such as number of internodes, millable stalk, plant height, stalk girth, single cane weight, cane yield, brix percent juice, pol percent, sugar recovery percentage and sugar yield were investigated. ANOVA indicated the existence of high phenotypic and genetic diversity between genotypes for all quantitative traits studied which could be utilized for further sugarcane improvement. The principal component analysis for the genotypes exhibited variance of 43.12%, 18.8% and 13.71% for the first three categories and accounts about 75.63% of the total variation and the juice quality traits showed greater loading for the variation in the first principal component category. Cluster analysis grouped genotypes in to five distinct classes with maximum number of genotypes (7) in cluster II and minimum (1) in cluster V. In the first cluster six sugarcane genotypes were included this accounted 27.27% of the investigated materials which had been categorized by high cane length and single stalk weight. The second cluster which accounts 31.82% of the materials were characterized by lower cane length and single stalk weight. Recoverable sugar percent had almost zero correlation with cane length, millable stalk count and sugar yield (r= 0.02, 0.02 and-0.01 respectively) indicating the possibility of simultaneous improvement of these traits.
1997
Seventeen diverse clones of sugarcane (Saccharum spp.) (7 early, 6 mid season and 4 late) were planted in October 1991 and 1992 in flooded (FE) and non flooded (NFE) environments for evaluation of cane yield, commercial cane sugar (CCS), internode length, internode number, stalk length, stalk thickness (circumference), stalk number, sugar recovery, and stalk weight. Cane yield showed significant positive phenotypic correlation coefficient (PCC) with stalk number in FE (P 6 0.05) and NFE (P 6 0.01). Stalk length had a significant positive PCC with stalk weight in both environments, and with internode length in FE (P 6 0.05). Commercial cane sugar also expressed significant positive PCC with cane yield in both environments (P 6 0.01), but with stalk number only in NFE (P 6 0.05). Genotypic correlation coefficients were generally in the same direction as PCC but higher in magnitude. In both environments, stalk number and stalk weight had relatively high positive direct effects on cane yield. However, flooding tended to enhance the direct effect of stalk weight and diminish the direct effect of stalk number on cane yield. Only cane yield and sugar recovery had high direct effects on CCS. Selection for improvement of cane yield can be based on stalk number and stalk weight in both environments. High yielding clones can be further screened for more sugar recovery to improve CCS.
Taylor and Francis, 2019
The objective of this study was to evaluate the G x E (genotype × environment) interaction using AMMI and GGE-biplot analysis for sugar yield of sugarcane genotypes and identify stable clones in the old sugar estates of Ethiopia. Eleven sugarcane clones plus one control clone were evaluated during three crop cycles (plant cane and first and second ratoon crops) in eight environments. The experiment was laid out as randomized complete block design with three replicates in over 3 years and locations. Adaptability and phenotypic stability of the sugarcane clones were evaluated using Additive main effects and multiplicative interaction (AMMI) and Genotype main effect and genotype x environment interaction (GGE). AMMI analyses revealed significant (P < 0.01) genotype and environmental effects as well as G × E with respect to sugar yield. In the analysis of variance, 48.8% of the sugar yield variation was explained by the environment, 16.9% by differences among genotypes, and 16.8% by GE interaction. GGE-biplot models showed that the eight environments used for the study belonged to two mega-environments. According to AMMI and the GGE results, clones G3 (FG05-424), the check variety G5 (NCO334), and G10 (FG06-750) were the most productive in tons of sugar per hectare and stable and recommended for the test environments. ABOUT THE AUTHOR Our research group is involved in research on sugarcane breeding and biotechnology. The team is working on evaluation and maintenance of sugarcane genetic resources and provision of adaptable high performing sugarcane varieties to the various sugarcane producing agro-ecologies in Ethiopia. Research areas of interest include study of abiotic and biotic stresses to sugarcane crop production and producing superior high yielding varieties that enhance productivity of the sugar industry. PUBLIC INTEREST STATEMENT In Ethiopia, as in other tropical countries, sugar-cane is the main source of sugar and sugar industry plays a significant role in the socioecon-omy of the country. The sugarcane breeding program aims to select new genotypes with local or broad adaptation to provide high yields over several crop years within target environments representative of different cultivation areas. The objective of this study was to evaluate the G x E interaction using AMMI and GGE-biplot analysis for sugar yield of sugarcane genotypes and identify stable clones in the old sugar estates of Ethiopia. Findings of the study confirmed that the eight environments used for the study belonged to two mega-environments. Sugarcane clones performing consistently in the test environments were identified and recommended. Findings from this study indicate representative test environments for future evaluation of sugarcane clones.