Vol. 6, Issue 4 (2018)
Variability studies in progenies of general cross combinations of sugarcane (Saccharum spp.)
Author(s): Somu G and Nagaraja TE
Abstract: Exploitation of variability in a crop like sugarcane with a complex ploidy and a high level of heterozygosity is a complicated process. The main difficulty in improvement of sugarcane is selection at seedling stage. Further, it is a vital stage of selection because it provides the base population for remaining and more effective stages of selection. New sugarcane cultivars are developed through the selection of vegetatively propagated genotypes, obtained from true seed after hybridization of superior parents. The study was undertaken to determine the potential of general cross combinations in sugarcane, obtained by open pollinating the female parents CoSnk 05103, Co8313, Co 1148, CP 44-101 and CoSnk 03632 to generate variants for eight traits and frequency distribution pattern of variants, hence generated. 1666 seedlings raised from five general cross combinations, comprising high sugared commercial varieties were investigated. Left skewed distribution (Skewness<0) was observed in all GCs, thereby indicating that most values are concentrated on the right of the mean. Leptokurtic distributions in progeny of GCI, GCII and GC III derived from CoSnk 05103 and Co8313, inferred that distribution of progeny presented higher peaks around the mean compared to normal distributions, which leads to thick tails on both sides. This signified that the most of the seedlings from CoSnk05103 and CoSnk03632 performed superior to the population mean and in the direction of higher scale.
Pages: 1923-1928 | 397 Views 47 Downloads
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How to cite this article:
Somu G, Nagaraja TE. Variability studies in progenies of general cross combinations of sugarcane (Saccharum spp.). Int J Chem Stud 2018;6(4):1923-1928.
