Five cotton cultivars (NIAB-884, Bt-101, CRIS-310, MS-39 and UCD-581) were crossed in a complete diallel design to investigate the inheritance pattern of some metric plant traits. Genetic differences were found significant (b>0.01) for all traits under study. Adequacy test showed that all the characters were fully adequate for genetic analysis. Additive component of genotypic variance (D) was significant and predominant for Plant height, number of sympodial branches, boll weight, seed cotton yield, lint percentage, staple length, fibre strength and fibre fineness, while over dominance effects (H1 and H2) mainly contributed for no. bolls per plant. Partial dominance was involved for plant height, no. of sympodial branches, boll weight, and yield of seed cotton, lint percentage, staple length and fibre strength. The value of H2/4H1 demonstrated asymmetrical and unequal distribution of dominant genes in the parents for all the traits.

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Seventy diverse genotypes were evaluated for drought stress for morphological (shoot and root length, fresh and dry shoot weight, fresh and dry root weight) and physiological traits (stomatal conductance, photosynthesis and transpiration rate) to increase the area under arid and semi-arid climatic condition to overcome the deficiency of edible oil. All genotypes varied significantly for all evaluated traits. High variability for photosynthesis rate and lower for transpiration rate but highly significant. Genotypic variance and its coefficient are almost higher for all characters then environmental variance and its coefficient. Additive gene action was found for stomatal conductance and fresh root weight, good characters for selection having high heritability with increased genetic advance used to find out drought tolerating genotypes. Genotypes ORI 29 and ORI 30 performed better in normal and drought stress condition can be used further breeding programme as a drought tolerant material. In PCA, genotypes ORI 30, ORI 27, ORI 38 and ORI 105 expressed maximum diversity can be used in further hybrid programme.

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The research was conducted in the research area of Department of Plant Breeding and Genetics (PB&G), University of Agriculture Faisalabad (UAF), Pakistan during spring 2014. The triplicated research trial was laid out following randomized complete block design (RCBD). Fifteen lines of sunflower were studied for genetic variability and association of economic traits with seed yield. The data were recorded on quantitative traits i.e. days to 50% flowering (DFF), plant height (PH), number of leaves per plant (NOL), head diameter (HD), leaf area (LA), filled achene (FA), 100 achene weight (100AW), oil contents (OC), achene yield per plant (AY/P) and qualitative traits i.e. head angle at maturity (HA), achene color(AC). The recorded data were subjected to analysis of variance, correlation and path coefficient analysis. The accessions were highly significant for all traits under study. The accessions A-2.2 showed good performance for most of studied traits. The accession B-3.1 also show better performance followed by A-4.3 and A-7.10. Genotypic correlations are higher than phenotypic correlations. 100AW, NOL, LA and HD had positive and highly significant genotypic correlations with AY/P. Genotypic correlation of AY/P was significantly negative with PH, DFF and oil contents. LA, NOL, 100AWand OC showed direct positive effect on AY/P. DFF, PH, HD and FA had negative direct effect on AY/P.