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Not AvailableGenetics and heterosis for quality and yield attributes in indigenous melon was studied by involving 28 cross combination obtained from crossing eight divers inbred of different intraspecific group of Cucumis melo in half- diallel fashion. The studies indicated that the additive as well as dominant component of variance were significant of most of the characters. The estimates of dominance component ($1 and$2) were higher than those of additive () component for all the characters except vine length and days to maturity. Overall evaluation indicates that parent-3, parent-6 and parent-7 were best general combiner for yield and other characters. Among the three best combination, hybrid combination P-7 x P-8 was considered best due to its maximum consumer preference in the present investigation.Not Availabl

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Not AvailableGene action, combining ability and heterosis for quality and yield attributes in pumpkin was studied involving 21 cross combinations obtained from seven diverse inbreds in half-diallel fashion for four characters.The analysis revealed that none of the parents was a good general combiner for all the characters consistently; however, the parent, pumpkin-172 was good combiner for flesh thickness, total carotenoids and yield. The parents, IVPK-226 and BP-18 appeared to be good general combiners for ascorbic acids content.The gca variances were higher than the sca variances for flesh thickness, total carotenoids and ascorbic acid, while yield per plant had gca variances lower than the sca variances indicating the pre-dominance of non-additive gene effects for yield and additive gene action for flesh thickness, total carotenoids and ascorbic acid. The cross Pumpkin-172 × Pumpkin-105 exhibited highest sca estimates for flesh thickness, total carotenoids and yield, while the combination, IVPK-226 × Pumpkin172 exhibited significant sca estimate for ascorbic acid content. The maximum heterosis for yield and ascorbic acid was exhibited by BS-165 × VRPG-7, whereas, BP-18 × Pumpkin-105 showed the maximum heterosis for total carotenoids.The study revealed that for improvement of traits like flesh thickness,total carotenoids and ascorbic acid, selections could be made, while fruit yield may be improved through hybridization.Not Availabl

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Not AvailableCombining ability and heterosis studies carried out through diallel method using seven parents with eight characters. The analysis revealed that none of the parents was found good general combiner for all the characters consistently, however parent BP-18, VRPG-7, Pumpkin-172 and IVPK-226 were best general combiners foryield and flowering traits. The gca variances were higher than the sca variance for days to first female flowering, node at which first female flower appears, number of fruits per plant and average fruit weight. While other characters viz.; number of female flowers per plant, equatorial and polar circumferences of fruit and yield per plant had gca variances lower than the sca variances indicating the predominance of non-additive gene effects. The maximum heterosis for number of female flower per plant was exhibited by Pumpkin-172 x BS-165. The selection should be made for improvement of traits like days to first female flowering, node at which first female flower appears, number of fruits per plant and average fruit weigh. While number of female flowers per plant, equatorial and polar circumferences of fruit and yield per plant may be improved through hybridization.Not Availabl

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Not AvailableVariability, character association, and path analysis were carried out in 599 individual plants of F2 population derived from an intra-specific cross of Cucumis melo x Cucumis melo var. Momordica. The observations were recorded on nine horticultural traits viz. number of branches/plant, vine length (cm), number of fruits/plant, polar circumference and equatorial circumference of fruit (cm), flesh thickness (cm), fruit weight (kg), total soluble solid (%) and yield/plant (kg). The analysis of variance revealed remarkable variation within population for concerned characters. The maximum range of mean value was recorded in vine length and minimum in flesh thickness. Regression analysis revealed that number of fruits contribute maximum towards increase of fruit yield, followed by fruit weight and polar circumference of fruit. Yield has positive and significant association with all other characters except total soluble solids (TSS). Number of fruits had the highest direct effect on yield followed by fruit weight. Therefore, number of fruits and fruit weight should be considered during selection for yield. These populations will be converted into Recombinant Inbred Lines (RILs) by selfing following the Single Seed Decent (SSD) methods will be very useful to map the Quantitative Trait Loci (QTLs) for horticultural traits and TSSNot Availabl

Studies on Genetic Divergence of Parental Lines and Their F1 Progeny in Bottle Gourd [Lagenaria siceraria (Mol.) Standl.]

The current experiment was carried out in Randomized Complete Block Design with three replications. In present investigation forty-three genotypes (10 lines + 3 testers + 30 F1’s) of bottle gourd were grouped into seven distinct non over lapping clusters. This suggested that the genotypes had a significant amount of variability. Additionally, it was discovered that the genotypes belonging to the same geographic area were clustered together. Thus, there was no consistent relationship between genetic divergence and geographical distribution. Number of genotypes per cluster ranged from fifteen to one. The cluster II was the largest with fifteen genotypes followed by cluster III and cluster I, cluster VII, cluster VI while, cluster IV had one genotype. The maximum intra cluster distance was recorded in cluster VII followed by cluster V and cluster III. Maximum inter-cluster distance was observed between cluster I and V followed by that between cluster V and VI and cluster III and VI. The higher inter cluster distance indicated greater genetic divergences between the genotypes of those clusters. The inter-cluster distance was least between cluster IV and VI indicated, that the genotypes of these clusters were genetically least diverse and with almost of the same genetic architecture. Percent character contribution towards genetic divergence among the bottle gourd genotypes were maximum for fruit length followed by days to first harvest, fruit circumference, node number to first pistillate flower appearance and number of primary branches plant-1. Therefore, these traits must be included while studying genetic divergence in bottle gourd. The results suggested that crosses between selected lines/F1’s from widely separated clusters are most likely to give desirable recombinants/hybrids

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Not AvailableGenetic variability, heritability (h2), genetic advance, character association and path analysis were carried out in 74 accessions of snapmelon (Cucumis melo var. momordica) for 12 quantitative characters. High phenotypic (PCV) and genotypic (GCV) coefficient of variation was observed for fruit weight and yield per plant. High heritability along with high expected genetic advance was recorded for polar and equatorial circumference of fruit. Yield had positive and significant correlation with fruit weight, polar and equatorial circumference of fruit at both phenotypic and genotypic level and with days to first female flower anthesis at genotypic level. Fruit weight, polar and equatorial circumference of fruit had positive correlation coefficient among themselves. Higher and positive direct effect on yield was exerted by number of fruits per plant followed by fruit weight, polar and equatorial circumference of fruit, days to first male flower anthesis and node at which first female flower appears. Besides, direct selection for fruit weight, indirect selection through polar and equatorial circumference of fruit could be considered for further improvement of yield.Not Availabl

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Not AvailableEarly blight disease is a serious threat to tomato cultivation in India causing severe loss in yield due to pre and post harvest losses. Apart from host environmental conditions are one of the major factors in disease development. Screening of different lines were done considering climatic conditions like temperature and relative humidity during years 2012 and 2013 and their responses for Alternaria disease symptoms was recorded as percent diseases index (PDI) at regular intervals continously for two years for different tomato cultivars/lines. Different lines were categorised on the basis of their PDI values and susceptible and resistant lines were selected among 77 lines during both years. None of the varities registered highly resistant reaction but the varities were resistant to the disease in both the yearsNot Availabl