Factor wise contribution of some morphological traits to sugar contents in Sacharum officinarm

The aim of present study was to enhance the efficiency of selection by developing Dm artificial variables which serve as selection criterion. 12 genotypes were planted it the research area of the Department of Plant Breeding and Genetics, University of Agriculture Faisalabad, following Randomized Complete Block Design with three replications. Data was recorded for 11 morphological and quality traits. Genotypic and phenotypic correlation coefficients among the characters under study were estimated. Data recorded also analyzed by Principal component analysis to reduce the original variables into smaller number of principal components which help in selection for high yield improvement. Plant height and cane height were positively and highly significantly correlated. Both of these showed positive significant association with number of canes per stool, juice contents and dry matter content. Strong positive correlation was found between Sugar contents and number of cane per stool. The PCA revealed that first 4 PCs explained more than 83.23% of the total variation. The contribution of PC1 32.57% to the total variation while the contribution of PC2 was 20.43%. The contribution of PC3 and PC4 was 15.91% and 14_39% respectively. The remaining seven PCs explained only about 17% of the total variation. By probing screen plot it was evident that first seven PCs have considerable variability while in remaining four PCs differences were negligible. Scatter plot showed that genotypes CPF-240, HSF-240, CPF-335 and CP72-2086 are not much &verse from each other as they are congested to same area. While genotypes HSF¬247, SGH-2924, COJ-84, CP-246, CPF-248, L-118, CP-77-400 and CPF-234 are 'present at distance from other genotypes with respect to PC 1 and PC2 so more &verse. Biplot revealed that In the PC1 and PC2 together internodal length, juice contents and yield per m2 showed minimum differences while other traits showed more differences. The information thus acquired from the research could be utilized to frame the suitable selection scheme to develop clones of the best commercial writs, suitable for cultivation in different environments. The genotypic correlations were split into direct and indirect effects of various traits on yield per m2. The direct effects of brix value and dry matter contents were positive on yield per m2. Cluster analysis was performed. Cluster analysis procedure grouped the 12 genotypes in to three clusters at a linkage distance with cluster I having five, cluster II having two and duster III having five genotypes respectively. [Khan FA, Zafar F, Saif-ul-Malook, Riaz A, Sher A, Sarfaraz A and Zeeshan M. Factor wise contribution of some morphological traits to sugar contents in Sacharum officinarm. Life Sci J 2015;12(5s):32-48]. (ISSN:10978135). http://www.lifesciencesite.com. 5

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