Character association and path analysis for fruit yield and it’s contributing traits in cucumber genotypes (Cucumis sativus L.) under naturally ventilated polyhouse during off season (original) (raw)
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Performance of different greenhouse cucumber cultivars (Cucumis sativus L.) in southern Iran
A 2 year trial was conducted with 15 cucumber (Cucumis sativus L.) varieties from diverse origins in the greenhouse conditions (southern Iran) to study genetic variation and to identify genetically distant parents to be involved in a hybrid seed production as well as to identify the most effective components of grain yield. However, the potential of identifying genetically distant parents depends on genetic diversity of population. The varieties were cultivated in a randomized complete block design (RCBD) with 3 replications for 2 years (2004-2006 seasons). Characters such as, yield and number of fruits in surface unit (m 2), yield in cold season, diameter and length of stem, length and diameter of fruit were evaluated analyzed for 2 years. Compound variance analysis showed that there were significant differences (α = 0.01) in yield between varieties at 2 years and the highest yield (23.81 kg/m 2) was obtained for E3215516 variety. Correlation analysis of varietal means showed that the highest correlation (0.932) was observed between number of fruits (NOF) and yield, and the least (0.01) between diameter of stem (DOS) and length of fruit (LOF). Based on factor analysis, 3 components were identified, explaining 77.5% of observed variation. Factor 1 (yield factor) accounting for about 45% of the variation, was strongly associated with yield, yield in cold season and number of fruits. Factor 2 (source factor) accounting for about 18% of the variation, consisted of stem related components including diameter of stem (DOS) and length of stem (LOS). Factor 3 (sink factor) accounting for about 15% of the total variation, associated with length and diameter of fruit (LOF and DOF). Using cluster analysis, the lines were classified into 2 distinct classes A and B. Class B contained lines from different origins.
2018
Thirty-two cucumber genotypes were evaluated at College of Horticulture, Anantharajupeta during Late Kharif 2016. The study was conducted to assess the nature and magnitude of association among yield and its contributing traits in cucumber. The experiment was laid out in RBD with three replications. In this study, genotypic correlation was higher than phenotypic correlations indicating the highly heritable nature of the traits. It was observed that the traits viz., number of fruits per plant, fruit weight, number of primary branches per plant, fruit length and vine length have exhibited highly significant positive association with fruit yield per plant. The genetic improvement of fruit yield thus can be obtained by direct selection of these yield components. The path coefficient analysis revealed that the number of fruits per plant, fruit weight, number of primary branches per plant, fruit length, 100 seed weight, number of seeds per fruit, days to last fruit harvest, fruit diameter and number of nodes per vine have direct positive phenotypic and genotypic effect on yield. Hence, direct selection for these traits can be done for improving fruit yield per plant.
UNIOSUN Journal of Sciences, 2018
Profitability of cucumber production requires adoption of variety that is well adapted to seasonal variability and various farming practices. This study was conducted at the Research farm of the College of Agriculture, Osun State University to determine the effect of seasons and farming practice on yield of six cucumber varieties. The factorial experiment comprised of two seasons (wet and dry), two farming practices (staked and un-staked) and six cucumber varieties (Ashley, Marketmore, Nagano F , Marketer, Poinsett and Murano 2 F) replicated three times in a Randomized Complete Block Design 1 1 (RCBD). Planting distance was 75 × 75 cm. Insect pests and fungi were controlled according to recommendations. Data were recorded for fruit yield, vine length (VL), days to flowering (DAF), fruit length (FL) and fruit girth (FG) and were further subjected to pooled analysis of variance, the genotypic and phenotypic coefficient of variation (GCV and PCV), 2 broad sense heritability (h b) and Genetic Advance of Mean (GA). The result revealed highly significant variety and season M mean squares for all characters. Variety by season interaction was highly significant for DAF, FL and yield. In the wet season Poinsett gave the highest fruit yield, while Murano and Nagano gave the highest in the dry season. Staked plants in dry or wet season gave higher fruit yield than unstaked plant.The higher values of PCV estimates over GCV for almost all the traits exhibited the impact of environment in the expression of the characters. Reasonable heritability observed for yield per hectare (46.12, 45.39, 41.64 and 62.78) coupled with high genetic advance (45.67, 49, 89.83 and 159.76) respectively across seasons and farming practices showed that this trait was under the control of additive genetic effects and can be directly selected for improvement.
International Journal of Plant & Soil Science
Thirty two cucumber genotypes were collected from different states of India and were evaluated for yield and quality characters at Bhubaneswar, Odisha during Rabi season of 2019. The relationships between fruit yield and yield components in cucumber genotypes were investigated and correlation studies revealed that yield per plant had positive and significant association with vine length, number of fruits per plant, fruit length, fruit diameter and average fruit weight, while significant negative correlations were observed with node at which first female flower appears, number of days to first female flower production, days to first harvest and severity of downy mildew percentage both at phenotypic and genotypic levels. Path coefficient analysis revealed that fruit diameter had maximum positive direct effect on yield per plant followed by fruit length, number of fruits per plant, days to first harvest, average fruit weight while, negative direct effect of n...
Genetic variability and correlation studies for productivity traits in cucumber (Cucumis sativus L.)
2018
Thirty cucumber cultivars were evaluated for growth and yield traits at College of Horticulture, Sirsi Karnataka. Results revealed that significant genetic variability present among genotypes for various traits, a high range of variation; high GCV and high heritability coupled with high genetic advance was recorded for node at first female flower, number of male flower, number of female flower, fruit weight, flesh thickness, fruit length and fruit width. It reveals that broad genetic base, less environmental influence and these traits are under control of additive genes. Further correlation analysis showed that number of female flower, fruit diameter and fruit number / vine had highly significant association with fruit yield. These traits can be used for parental selection in the improvement of local cultivars.
Selection indices for fruit yield improvement in elite cucumber (Cucumis sativus L.) cultivars
Acta Horticulturae et Regiotecturae, 2021
Cucumber (Cucumis sativus L.) is an important vegetable crop, rich in vitamins and minerals and eaten fresh as a dessert. Its fruit yield is relatively low, though could be improved through knowledge of character association with it and selection of desirable materials for improvement programmes. Fifteen cultivars of Cucumber were evaluated at two locations (Abeokuta and Ibadan), South West, Nigeria in a randomized complete block design with three replicates in order to determine heritability, correlation, direct and indirect effects of characters on fruit yield. Data collected on agro-morphological characters were subjected to analysis of variance, estimates of heritability, correlation, and path analysis. Significant variations (p <0.05) were observed in the cultivars. High heritability estimates (>90%) was observed for fruit length at both locations. A significant phenotypic and genotypic correlation was observed between fruit yield and fruit weight. Number of days to 50% f...
Notulae Scientia Biologicae
Sixteen exotic and indigenous cucumber genotypes (Cucumis sativus L.) were evaluated under early and late seasons planting. This was to characterize the cucumber genotypes based on their performance in the derived savannah of Southeast Nigeria agro-ecological zone and estimate character association and contribution towards total fruit yield per hectare. The vegetative traits, such as vine length, number of branches, number of leaves and leaf area were measured at 8 weeks after planting. The phonological traits measured were: days to flower initiation and days to 50% flowering. The reproductive traits like number of staminate flowers per plant, number of pistillate flowers per plant, fruit length, fruit girth, fruit weight per plant, number of fruits per plant, average fruit weight and total fruit yield per hectare were also recorded. Obtained data was subjected to analysis of variance in randomized complete block design and path analysis. The results showed a highly significant diff...
The present study was conducted to assess the nature and magnitude of association among yield and its contributing traits in cucumber. The estimates of magnitude of phenotypic coefficient of variation (PCV) were higher than corresponding genotypic coefficient of variation (GCV) for all characters studied. High PCV and GCV value were obtained for the characters viz., number of fruit per plant, marketable yield per plant, nodal position of first female flower, internodal length, number of female flower per node, days to anthesis of first female flower, vine length and fruit weight. Correlation studies revealed that yield had significant positive association with number of fruits per plant, fruit girth, fruit weight and vine length and negative with nodal position of first female flower both at phenotypic and genotypic levels. Path coefficient analysis concluded that number of fruits per plant and fruit weight were the major traits contributing towards yield and selection based on these traits will be appropriate for increasing the yield of hybrid cucumber.
Journal of Agrobiotechnology, 2023
In cucumber (Cucumis sativus L.) male and female flowers' production rate is not the same in every variety, which is the main cause to create variation in fruit set. Though natural pollinators (honeybees and flies) are significant catalysts in fruit settings, but if genetically the female flower production rate is lower then we cannot expect more fruits from that plant. Knowing the female flower-bearing characteristics of selected cucumber plants is important otherwise cannot expect the desired yield from the plant. Considering the overall issues, a study was conducted for the evaluation of performance of five cucumber varieties namely, Timun Putih Besar (TPB), Timun Hijau Manis (THM), Timun Hijau Tanga (THT), Timun Susu Besar (TSB), and Timun Putih (TP). The study was carried out in Nethouse 7 at the Faculty of Sustainable Agriculture (FSA), Universiti Malaysia Sabah (UMS), Sandakan. Data on plant height (cm), numbers of leaves, days to first male and female flowering, total numbers of male and female flowers, fruit length (cm), fruit diameter (cm), fruit weight (g), total numbers of fruits per plant, total yield (kg), and leaf chlorophyll content were collected and analysed. The result showed that there were significant differences (p<0.05) among the varieties for days to first male and female flowering, total numbers of female flowers, fruit length (cm), fruit diameter (cm), fruit weight (g), total number of fruits per plant, total yield (kg) and chlorophyll content, respectively. Overall, Timun Hijau Manis (THM) significantly (p<0.05) exhibited the best performance for days to first female flowering (25.50 days), total numbers of female flowers (21.50), total number of fruits per plant (5.75), and total yield (1.99 kg) compared to other 4 varieties. Therefore, THM variety is highly recommended to farmers for the overall performances and yield followed by TBP, THT, TSB and TP cucumber varieties, respectively.
This study was conducted at the Horticulture Research Institute, Agriculture Research Center in Egypt during the period from 2017 to 2019 to develop cucumber (Cucumis sativus L.) inbred lines and hybrids tolerant to high temperature to reduce losses in quality and yield and evaluate them under greenhouse conditions. Twenty two inbred lines and twenty hybrids were evaluated in the two successive summer plantings of 2017/18 and 2018/19 under greenhouse conditions along with the hybrid Lamar as a control. Total yield reflected great variation among the inbred lines and ranged from 5.50 to 0.53 kg m-1. P 10 gave the greatest total yield and it was at par with P 19. Narrow range (3.20 to 2.50 cm) was observed among hybrids for fruit diameter. The highest value was recorded in P 2 ×P 5. Fruit weight reflected great variation among the hybrids and the hybrid, P 2 ×P 5 gave the heaviest fruit weight. Data showed significant differences among hybrids for total yield and hybrid P 1 ×P 3 gave the highest value of total yield and was at par with hybrid Lamar (control). The cross P 1 ×P 4 achieved high specific combining ability (SCA) effects for all traits in this study which means comparing the general combining ability effects (GCA) of the parents to their corresponding crosses' SCA indicate that the GCA effects of the parents were reflected in the SCA effects of the crosses for the most studied traits. The reciprocal effects in F 1 diallel crosses were significant for most of the traits studied and the cross P 5 ×P 1 achieved high SCA effects for all traits.