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Gentic studies for fruit yield per plant and its attributing traits in brinjal was conducted by following line x tester mating design comprising of seven lines and four testers at Instructional Farm, Junagadh Agricultural University, Junagadh, Gujarat. The analysis of combining ability revealed the predominant role of both additive and non-additive gene effects in the inheritance of fruit yield and its component traits. The genotypes NSR-1, JBG-10-208 and Pant Rituraj displayed high gca effect for fruit yield per plant and some desirable traits like days to 50 % flowering, days to first picking, fruit girth, fruit weight, numbers of primary branches per plant, plant spread and total soluble solids. The estimates of sca effect of the crosses indicated that five hybrids manifested significant and positive sca effect for fruit yield per plant. The crosses JBG-10-208 x GJB-2, ABR-2-23 x GBL-1 and AB-09-1 x GOB-1 were emerged as best specific combinations. The cross JBG-10-208 x GJB-2 was also found good specific combiner for plant height, fruit weight, fruit girth and number of primary branches per plant and also showed maximum per se performance. These hybrids may be exploited for obtaining transgressive segregants toward developing hybrid varieties in brinjal.

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The manifestation of hybrid vigour in 28 F 1 hybrids was studied along with 11 parents. Significant heterosis over better parent and standard check was observed for fruit borer infestation and fruit yield per plant. Two hybrids, JBL-10-04 x GBL-1 and JBL-08-8 x Pant Rituraj exhibited negative but desirable heterosis expressing least infestation of fruit borer. Hence these hybrids may be recommended for commercial cultivation after proper testing. Further, the hybrids, which also possessed high per se performance for various traits may be exploited for isolating high performing transgressive segregants in generation advancement.

The study was conducted during summer 2014-15 at the Instructional Farm, College of Agriculture, Junagadh Agricultural University, Junagadh to assess the genetic diversity among 50 genotypes of bottle gourd (Ligenaria siceraria L.). The genetic diversity analysis revealed the formation of 13 clusters suggesting the presence of wide genetic diversity. The clustering pattern indicated that geographic diversity was not associated with genetic diversity. The analysis of per cent contribution of various characters towards the expression of total genetic divergence indicated that number of fruits per vine (22.45%) followed by number of primary branches per vine (13.80%), average fruit weight (11.51%), vine length (11.18%), fruit yield per vine (10.61%), number of male flowers (7.84%), fruit length (6.45%), ratio of male to female flowers (4.82%), days to first picking (4.49%) and days to opening of first male flower (3.84%) contributed maximum towards total genetic divergence. Based on the maximum genetic distance. It is advisable to attempt crossing of the genotypes from cluster XII(GP-14) with the genotypes of cluster IV (GP-25) and XI (GP-53), which may lead to the generation of broad spectrum of favourable genetic variability for yield improvement in bottle gourd.