Sugarcane is a major cash crop of the world and occupies significant position in agricultural economy of Pakistan Study on correlation and path coefficient analysis on ratoon crop for cane yield and yield related traits in 20 accessions of sugarcane (Saccharum officinarum L.) was conducted in the field of the Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad, during the 2008-09.Analysis of variance indicated highly significant differences among the accessions for all the traits. Among the traits plant height, leaf area, dry matter contents, bagasse weight and cane yield had the positive and significant correlation with brix value at genotypic level. Molecular markers are useful for assessment of variation and phylogenetic relationships. Out of 30 fragments amplified with 15 primers used among the 10 sugarcane somaclones and a parent plant, only 3 bands were polymorphic while rest of the 27 bands were monomorphic. Therefore, it may be concluded from the present results that SSR markers can be used for the identification of somaclonal variation and the relationship between parents and somaclones.

Sugarcane is one of the major sugar crops of the world. In Pakistan, it occupies a significant position in the agricultural economy. The present investigations were carried out to examine the genetic variability and contribution of some morphological characters for cane yield and response of genotypes of sugar cane toward callus formation, regeneration and screening for virus. The results pertaining to analysis of variance elucidated highly significant differences among the accessions for all the traits. The tissue culture study revealed that at different treatment over all performance of HSF-247 was better for callus induction and genotype HSF-242 performed best at 3mg/l of 2, 4-D level. All the investigation in the correlation study proved quite successful because a handful increase in cane weight and plant height is possible as they provide information regarding a suitable combination of characters with their maximum influence on the enhancement of cane weight and plant height. The clone will be selected with such combinations of characters which to give maximum improvement in their cane yield.

Study on correlation and path coefficient analysis for cane yield and yield related traits in ten accession of sugarcane (Saccharum officinarum L.) was conducted Analysis of variance indicated highly significant differences among the accessions for all the traits. The study of path analysis for yield related traits depicted that plant height, cane thickness, leaf area, internodal distance and brix value had the direct negative effects on yield. Study carried out to investigate the response of different sugarcane varieties to Callogenesis in order to analyze variation for sugarcane mosaic virus resistance. Total 26 parent plants and 64 somaclones of HSF-240 were selected for screening of virus through Das ELISA test. Four parent plants out of 26 showed negative and Ten somaclones showed positive reaction to the disease and were declared as susceptible.Somaclones produced were also analyzed by microsattelite molecular markers in order to analyze the vriation between parents and somaclones produced at molecular level.It may be concluded from the results that SSRs can be used for identification of somaclonal variation and the relationship between parents and somaclones.

A 5 x 5 diallel cross experiment was conducted involving the verities i.e. AC-134, MS-39, 124-F, CIM-473, and LA-85-52-2 to evaluate the type of gene action involved in the inheritance of various morphological and yield contributing traits in upland cotton. The analysis of variance revealed that differences between genotypes for all the traits were highly significant. The results of joint regression analysis revealed that the data for all the traits were fit for simpole additive dominance model.The genotype AC-134 carried maximum dominant genes for plant height, number of sympodial branches and ginning out turn. The genotype 124-F possessed maximum number of dominant genes for number of monopodial branches.The genotype CIM- 473 was found to be the best general combiner for number of bolls per plant, boll weight while the genotype MS-39 seemed to be the best general combiner for plant height. From the above results it was suggested that the plant traits could be improved by simple selection procedure because they are controlled by additive type of gene action as far their phenotypic expression is concerned.