Studies on diversity for quality characters, cane yield and its contributing traits in sugarcane (Saccharum spp. complex) clones
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Date
2019
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CCSHAU
Abstract
Sugarcane (Saccharum species complex) is one of the important cash crop and playing a vital
role in improving the economy of the country. It has unusual ability to store sucrose in stem cell
vacuoles. In this study, 51 sugarcane genotypes were evaluated for morphological and quality characters
in randomized block design (RBD) with two replications during 2018-19 at CCS Haryana agricultural
university, regional research station, karnal. The sufficient genetic variability was observed from
significant genotypic differences for all the 22 characters studied, indicated the appropriateness of the
material selected. Phenotypic coefficient of variation (PCV) was higher than genotypic coefficient of
variation (GCV) for all the characters representing more environmental impact on these characters for
total variation. High heritability (broad sense) coupled with high genetic advance was observed for
cane yield, commercial cane sugar (t/ha), germination % at 45 days after planting, number of millable
canes at harvest, single cane weight, sucrose % at 8th month stage and commercial cane sugar % at 8th
month stage. Therefore, it indicates that simple selection will be effective for these traits. Phenotypic
correlation coefficients for cane yield showed significant and positive relationship with commercial
cane sugar (t/ha), number of tillers at 120 days after planting, number of shoots at 240 days after
planting, number of millable canes at harvest, single cane weight, stalk length, stalk diameter and brix
% 10th at month stage. These traits play a greater role as an important contributing character for higher
cane yield. The path coefficient analysis revealed that cane yield was shown by commercial cane sugar
% at 10th month stage followed by commercial cane sugar (t/ha), sucrose % 12th at month stage, number
of millable canes at harvest, single cane weight and stalk length had highest positive direct effect on
cane yield. Therefore, in order to improve cane yield, effective selection can be accomplished for the
characters having high direct effects. Based on D2 value, the clustering of 51 genotypes was carried out
which resulted in 7 diverse clusters. The maximum inter-cluster distance (86.81) was observed between
cluster II and cluster III. Bi-parental mating or poly-cross method involving genotypes belonging to
cluster II (Co 7717, CoH 110, CoH 167, CoS 767 ) and cluster III (12-41, 11-703, 12-184, 12-263, 12-
493, 12-521, Co 89003) may be utilized in the hybridization programme as crossing between diverse
parents is likely to produce wide genetic variability among the progenies.
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