Genetic Variability, Correlation, and Path Analysis of Thai Commercial Melon Varieties (original) (raw)
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Acta Horticulturae, 2018
Genetic variation and 12 morphological traits of 25 melon cultivars, comprising 22 muskmelon/cantaloupe and three Thai melon accessions, were studied. The Thai melons were TM-RFS, TM-LFS and TM-OFS, which have round, long and oblongata fruit shape, respectively. The melon cultivars did not shown significant differences in stem diameter, but the other 11 morphological traits were found to be significantly different. ML1496, TM-RFS and TM-LFS had the highest leaf stem angle. The pulp percentage and fruit firmness were highest in ML1496; 'Sweety' had the highest fruit weight; 'Green Jam' showed the largest fruit perimeter and fruit width; TM-LFS and TM-OFS had the greatest fruit length and cavity width; 'Golden Sun' gave the highest fruit flesh thickness; ML052 showed the highest peel thickness; and NUN2002 and 'Honey Sweet' had the highest total soluble solids. Cluster analysis using morphological traits classified the melon cultivars into nine groups (at R 2 =0.75), with five cultivars in groups 8 and 9, four in group 6, three in group 1, two each in groups 2, 3 and 7, and only a single cultivar in each of groups 4 and 5. Three primers [ISSR_(GA)8YG, ISSR_(ATG)6 and RAPD_OPL07] from 13 primer sets grouped the melon cultivars in only two cluster groups (Thai melon group and muskmelon group). When using morphological traits combined with molecular markers, the analysis classified the melons into seven groups at R 2 =0.83: four cultivars in group 6, three in group 5, two each in groups 1 and 4, and a single cultivar each in groups 2 and 3. These results will help support the efficiency of parent line selection in the muskmelon/cantaloupe and Thai melon breeding programs.
Variance component analysis of plant architectural traits and fruit yield in melon (Cucumis melo L.)
A cross was made between a unique highly branched, early flowering line, U. S. Department of Agriculture (USDA) 846-1 (P 1; 7 to 11 lateral branches), and 'Topmark' (P 2 ; 2 to 4 lateral branches), a U.S. Western Shipping melon, to produce an array of 119 F 3 families. Subsequently, a genetic analysis was conducted at Arlington and Hancock, Wisconsin in 2001 to evaluate the segregating progeny for factors likely involved in yield-formation, including days to anthesis, percentage of plants with early pistillate flowering, primary branch number, fruit number and weight per plant, average weight per fruit, percentage of plants with predominantly crown fruit set, and percentage of plants with early maturing fruit. Although, genotype 9 environment (G 9 E) interactions were important for some traits (e.g., fruit number and fruit weight), considerable additive and/or dominance variance was detected for all traits. This research provides critical data associated with highly branched melon germplasm including trait correlations and heritabilies (broad-and narrow-sense ranged between 0.28 and 0.91) that used judiciously will allow the development high yielding melon cultivars with early, basally concentrated fruit suitable for once-over or machine harvesting operations.
Indian journal of agricultural research, 2020
Diversity of 9 local Iranian genotypes of melon was studied based on 28 quantitative and qualitative agro-morphological traits, using multivariate statistical methods. Analysis of variance showed significant differences between genotypes for all quantitative traits. However, the studied melon genotypes were previously clustered in two main groups of inodorous and cantalopensis, cluster analysis classified them in four different groups based on all traits, in particular outlaying Shadegani genotype from Inodorous group. Clustering was also supported by principal components analysis (PCA). The first two PCs contributed 60% of the total variability and demonstrated variations mainly on the basis of yield related traits including fruit number, day to flower, day to harvest, fruit weight, fruit length and other distinctive traits such as rind pattern, peduncle attachment strength, fruit firmness and aroma. Accordingly, agro-morphological traits could be used for variation studies in melons and results might be useful for improving breeding programs.
Generation means analysis of plant architectural traits and fruit yield in melon
Unique architectural phenotypes have the potential for increasing yield in commercial melon (Cucumis melo L.). Therefore, a generation means analysis was conducted to investigate the inheritance of architectural traits (days to anthesis, primary branch number, fruit number and weight, and average weight per fruit). Progeny () from a cross between US Department of Agriculture (USDA) line, USDA 846-1 (P 1 ) and ÔTopMarkÕ (P 2 ) were evaluated at Arlington (AR) and Hancock (HCK), Wisconsin in 2001. Significant (P £ 0.05) environment effects and genotype · environment interactions (G · E) analyses necessitated analysis by location. Significant differences (P £ 0.05) among parents and generations were observed for all traits, and the two parental lines differed significantly for primary branch number, fruit number and average weight per fruit. Additive gene effects were most important in governing primary branch number and fruit number per plant, while dominance and epistatic genetic effects mainly controlled days to anthesis, fruit weight per plant and average weight per fruit. Narrowsense heritabilities were 0.62 (AR) for days to anthesis, 0.71 (AR) and 0.76 (HCK) for primary branch number, 0.68 (AR) and 0.70 (HCK) for fruit weight per plant, 0.33 (AR) and 0.45 (HCK) for fruit weight per plant, and 0.06 (AR) and 0.79 (HCK) for average weight per fruit. Estimations of the least number of effective factors for primary branch number were relatively consistent at both AR (approx. 4) and HCK (approx. 2). Results suggest that introgression of yield-related genes from highly branched melon types (e.g. USDA 846-1) into US Western Shipping germplasm may aid in the development of high-yielding cultivars with concentrated fruit set suitable for machine and/or handharvesting operations.
2024
Muskmelon (Cucumis melo L.) is one of the members of Cucurbitaceae family with diploid chromosome number 2n=2X=24. It is thought to have originated in tropical Africa. The experiment comprises of 33 genotypes of muskmelon collected from various location. During the months of February to May 2022, the plants were raised in three replications with spacing of 3 m x 60 cm using a Randomized Block Design (RBD) at Puthur village, Thalaivasal taluk, Salem district. The result shows, estimates of high PCV and GCV (>20%) were recorded in fruit yield per plant (60.16 & 60.09) followed by seed yield per fruit (41.70 & 41.62), average fruit weight per plant (41.56 & 41.49), seed yield index (39.50 & 39.42) respectively. Highest heritability (>60%) along with high genetic advance as per mean (>20%) were noticed in fruit yield per plant (99.79 & 98.55) followed by average fruit weight per plant (99.66 & 85.32), seed yield index (99.59 & 81.03) and seed yield per fruit (99.58 & 85.55) respectively. It indicates the presences of additive gene action for these characters. Therefore, selection may be effective for these characters.
Acta Agronomica Hungarica, 2008
Genetic variability and correlation analysis were studied in 20 accessions of ‘egusi’ melon during two growing seasons. The genotypic correlation coefficients with seed yield were partitioned into direct and indirect effect causes. Heritability in the broad sense ranged from 17% for fruit circumference to 90% for days to germination and flowering in the early season, while in the late season, heritability ranged from 7% for seed weight per fruit to 88% for days to germination. High phenotypic and genotypic coefficients of variation were recorded for seed yield while days to maturity had the lowest in both seasons. Fruit circumference and fruit weight had significant genotypic and phenotypic correlation with seed yield in the early season, while number of branches per plant, vine length per plant, number of fruits per plant and fruit circumference per plant showed significant genotypic and phenotypic correlation with seed yield in the late season. Environmental correlation coefficien...
The highly polymorphic in sweet melon for many commercial traits providing seemingly endless possibilities for genetic improvement. The main objective of current study was to estimate of genetic behavior and obtain the genetic parameters of sweet melon advanced lines (Cucumis melo L. var. aegyptiacus). Eight inbred lines were developed from previous study using a pedigree selection method. The selected inbred lines were crossed according to factorial mating design generated 16 crosses. The additive genetic variance played an important role in the inheritance of yield and most yield component traits. Female variance (σ 2 f) appeared to be larger than male variance (σ 2 m) for the most quality traits except for taste. The magnitudes of additive genetic variance (σ 2 A) were lower than their non-additive including dominance (σ 2 D) for all studied yield traits, except for number of male flowers per plant and fruit length. The MAGD105, MAGD106 and MAGD107 are promising lines that could be used in farther improvement programs.
Integrated Selection Criteria in Melon Breeding
Muskmelon (Cucumis melo L.) yield could likely be improved through genetic manipulation. Estimating genetic diversity and determining relationships among germplasm enhances efficiency of germplasm collection management and genetic improvement. Experiments were conducted with muskmelon from Mar. to June 2012–2013 and 2013–2014 to determine trait selection, which contributes to high yield. For all traits degree of genetic variation was determined to account for genetic and environment effects. Minimum genetic variance (9.66), along with high genetic interaction with the environment (19.33), led to low heritability (0.24) for yield. Broad sense heritability of traits included in the differentiating model was higher than in production. Number of fruit, fruit weight, fruit width, flesh diameter, and plant yield can differentiate genotypes with high or low production. Discriminant function of these traits, particularly fruit weight, for current outputs was used as an all-inclusive parameter for determining landraces with the highest yield. About three quarters of variation in yield can be explained with discriminant function, and weight is substantially related to total production (r = 0.72**), which can be beneficial in breeding. Variable importance in partial least squares analysis demonstrated that fruit number, fruit width, and fruit weight had the highest significance and can be used for predicting ultimate production. Selection using genetic variability can enhance genetic achievement of improved production.
International Journal of Agricultural Technology, 2011
Seventy four (74) accessions of Thai bitter melon (Momordica charantia L.) landraces were collected from three provinces in central region of Thailand including Prajuabkirikhan, Samutprakarn and Chachoengsao, and phenotypic diversity in horticultural characteristics was accessed. They showed rather high phenotypic variation in fruit weight and seeds per fruit, and appreciable variation in several traits such as petiole length, petal width of both staminate and pistillate flower, fruit width, fruit length and fruit peduncle length. Principal component analysis of 15 representative characteristics was performed to determine the most important variables contributing to the variation. It revealed that the first 7 principal components (Eigen values > 1) accounted for 69.82 % of the total multivariate variation among the accessions. Hierarchical cluster analysis based on Ward’s distance method was conducted using the 7 components; it grouped the 74 accessions into four appropriate clus...
Electronic Journal of Plant Breeding
Fifteen indigenous genotypes of oriental pickling melon were planted in randomized block design during August, 2008 and were assessed to know the nature and magnitude of variability and genetic divergence for fifteen quantitative traits. High values of genotypic coefficient of variance along with high heritability and genetic advance were recorded for first female flowering node, number of fruits per vine, average fruit weight, fruit flesh thickness, fruit cavity size and total yield per vine. Hence, these characters should be given more emphasis while making selection for high yielding genotypes. On the basis of genetic divergence, the fifteen genotypes were grouped into five clusters irrespective of geographical diversity. Cluster II topped in having eight genotypes while the clusters IV and V were solitary. Total fruit yield per vine (66.67 %) contributed maximum towards the total diversity followed by fruit cavity size (21.90%), fruit flesh thickness (3.81%), fruit dry weight (3.81%) and first female flowering node (1.9%). The maximum inter cluster D 2 value (1720) was observed between clusters V and IV indicating greater diversity among the genotypes and availability of better parents for developing novel hybrids. CMC GKVK 10 can be utilized in breeding programmes to transfer most of the desirable traits.