Combining Ability and Genetic Variance Components of a Diallel Crosses Among Some Squash Varieties

El–Hadi, A. H. Abd; Shekari, Farid; El-Khatib, Eman H.

doi:10.21608/jacb.2013.53015

Cited by 3 publications

(4 citation statements)

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“…These results were in agreement with the results obtained by Abd El-Hadi et al(2013); Hussien (2015); Israa, (2016) and Abdein et al (2017).…”

Section: Analysis Of Variancesupporting

confidence: 93%

“…It means that additive genetic variance was more important in the inheritance of those characters. These results are in agreement with those of Al-Araby (2010), Ghobary and Ibrahim (2010), Abd El-Hadi et al( 2013), Israa, (2016 and Abdein et al(2017). Table 8.…”

Section: Analysis Of Combining Ability Variancessupporting

confidence: 92%

“…Abou El-Nasr et al (2010) found that highly significant differences for general and specific combining abilities of leaf area, sex ratio, number of node to first female flowers, Early yield and total fruit weight per plant. On summer squash, Ahmed, et al (2003) and Abd El-Hadi et al (2013) illustrated that the mean squares of GCA and SCA were highly significant for stem length, leaf area, number of leaves per plant, number of male flowers per plant, number of female flower per plant and sex ratio. Moreover, they found that both GCA and SCA genetic variances were highly significant for the tested characters indicating the relative importance of both additive and non-additive gene actions.…”

Section: Introductionmentioning

confidence: 99%

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Heterosis and Combining Ability for Development of Squash Hybrids (Cucurbita pepo L.)

Shoura

Abed

2018

Journal of Plant Production

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The aim of this study is to evaluate a set of inbred lines and their hybrids and to determinate the phenotypic and genotypic parameters. In addition, identify the heterosis and combining ability for the studied traits in order to determine the best combinations and the ideal improvement strategy for hybrid production in squash. The experimental study was conducted at El-Baramoon Research Station, Horticulture Research Institute during the two summer season of 2016 and 2017. Six inbred lines selected from Eskandrani cultivar and fifteen F 1 hybrids were evaluated for different traits. Significant differences were observed among the hybrids and their parents for all studied traits. Based on mid-parent heterosis, the hybrid (P 5 x P 6) gave the highest value for early yield per plant (98.51 %) followed by the hybrid (P 1 x P 4) (90.24%) for the same trait. While heterosis over better parent, the hybrid (P 1 x P 6) gave the highest value for early yield per plant (78.95 %) followed by the hybrid (P 5 x P 6) (73.91 %) for the same trait. Furthermore, the highest mid-parent hertrosis for total yield per plant was obtained by the hybrid P 4 x P 6 (75.0%) followed by P 5 x P 6 (60.38%) and P 4 x P 5 (59.65%). Otherwise, the largest heterosis over better parent for total yield per plant were expressed by P 4 x P 6 (61.77%) followed by P 4 x P 5 (46.77%) and P 5 x P 6 (37.10%), respectively. General combining ability (GCA) was significant or highly significant for all traits except for early yield per plant and shape index, specific combining ability was highly significant for all traits except for number of node female flower and early yield per plant. The estimated GCA/SCA mean squares revealed that the additive gene effects were the major effect in the inheritance of all studied traits, except for early yield per plant and vitamin C. Also, GCA estimates were larger than their corresponding estimates of SCA for most of the studied traits. The result illustrated that both additive and non-additive gene actions were positive for all studied traits. Heritability in broad sense ranged from 72.95 to 99.46 % for number of node female flower and total soluble solids, respectively. Also, heritability in narrow sense ranged from 28.49 to 81.94 % for number of leaves per plant and fruit shape index. The parent P 1 , P 2 and P 3 could be recommended as good combiners for average fruit weight, vitamin C, number of fruits per plant and total yield per plant whereas the P 5 and P 6 as promising parents for plant height, leaf area, number of leaves per plant , days to anthesis of female flowers, number of node of female flower and total soluble solids.

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“…These results were in agreement with the results obtained by Abd El-Hadi et al(2013); Hussien (2015); Israa, (2016) and Abdein et al (2017).…”

Section: Analysis Of Variancesupporting

confidence: 93%

Section: Analysis Of Combining Ability Variancessupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Heterosis and Combining Ability for Development of Squash Hybrids (Cucurbita pepo L.)

Shoura

Abed

2018

Journal of Plant Production

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“…From the results in Table 6 shows that the crosses 2X8 and 3x6 had significant desirable effect of SCA of all traits except fruit diameter in 2x8 and fruit weight in cross 3x6. The results are agreement with (1,2,12) in summer squash. Table 6.…”

Section: Table 4 General Combining Ability Effects Of Parents (Tester...supporting

confidence: 87%

Combining Ability and Genetic Parameters for Yield and Its Componenets Using Line X Tester Analysis in Summer Squash

Zhiyan A. T,

Mohammed A. Hussain

2023

Iraqi J. Agric. Sci.

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This study was aimed to investigate combining ability and genetic parameters in summer squash (cucurbita pepo L.). Eight inbred lines of summer squash were crossed in line x tester method in summer season 2020. The parental lines (3 tester and 5 lines) and their off springs (15 hybrids) were planted out in the summer season 2021 at vegetable field, Horticulture Department, College of Agricultural Engineering Science, Duhok University. The experiment lay out using randomized complete block design with three replications. The results indicated that the mean square for genotypes were highly significant effect for tester , line and line x tester in all studied traits. The Tester LBL2 and line PEP1670 were the best combiner for days to 50% female flowering, number of fruit plant-1 and yield kg plant-1. The crosses (LBL2 X N33133) and (LES3 X CNS2881) exhibited significant positive effect of specific combining ability for fruit length cm, number of fruit plant-1 and yield plant-1. The heritability in broad sense were higher than narrow sense heritability for all studied traits ranged between 93% for days to 50% female flowering to 40% for fruit weight. The average degree of dominance less than one in all traits except days to 50% female flowering and fruit length.

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Heterosis and Combining Ability in Pumpkin Inbreds (Cucurbita moschataDuch. ex Poir.)

Shafin

Haque

Parvin

et al. 2022

Preprint

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Twenty hybrids along with five parents evaluated in the study were mainly contemplated to find out the best cross combinations and the best general and specific combiners as well as to estimate the nature and magnitude of the gene action for different qualitative traits. Using Griffings and Haymans approach through a 5 X 5 full diallel cross fashion, an investigation on heterosis and combining ability in pumpkin was undertaken following RCBD design with three replications at the experimental field. Both positive and negative significant GCA and SCA variances were obtained from few parents and hybrids. Predominance of additive-additive gene action was noted for most of the characters except hollowness and dry matter content, where additive-dominance gene action was predominant; flesh thickness and brix (%), where dominance- dominance gene action were predominant. A single parent was not found as good combiner for more than two characters. The best specific combiners were IBD 40 X IBD 47 for beta carotene, total sugar and fruit yield; IBD23 X IBD40 for brix (%), hollowness and flesh thickness; IBD40 X IBD57 for fruit breadth; IBD47 X IBD50 for non reducing sugar; and IBD47 X IBD57 for reducing sugar. The Vr-Wr graphs exhibited complete, partial and over dominance effect of genes for different characters. Complete dominance was observed only for beta carotene whereas over dominance was noticed for hollowness and flesh thickness. Partial dominance was ensured for fruit breadth, dry matter, brix (%), reducing sugar, non-reducing sugar, total sugar and fruit yield. Significant heterosis of some crosses against mid parent and better parents were observed for some characters.

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Combining Ability and Genetic Variance Components of a Diallel Crosses Among Some Squash Varieties

Cited by 3 publications

References 4 publications

Heterosis and Combining Ability for Development of Squash Hybrids (Cucurbita pepo L.)

Heterosis and Combining Ability for Development of Squash Hybrids (Cucurbita pepo L.)

Combining Ability and Genetic Parameters for Yield and Its Componenets Using Line X Tester Analysis in Summer Squash

Heterosis and Combining Ability in Pumpkin Inbreds (Cucurbita moschataDuch. ex Poir.)

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