Manifestation of Heterosis and Genetic Parameters Associated With It for Some Vegetative and Earliness Traits in Squash

El-Hadi, A. Abd; El–Adl, A. M.; Hamada, M.; Abdein, M.

doi:10.21608/jpp.2005.237163

Cited by 2 publications

(4 citation statements)

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“…These results are in agreement with those of Obiadalla-Ali ( 2006), Tamil et al, (2012) and El- Adl et al, (2014).…”

Section: Average Degree Of Heterosissupporting

confidence: 93%

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Genetics analysis, combining ability and heterosis of some yield and yield component traits in summer squash (Cucurbita pepo L.)

Soliman

2022

Menoufia Journal of Plant Production

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This study was carried out from 2020 to 2022 at Kaha vegetable Research Farm, Horticulture Research Institute, Kaliobia Governorate under unheated plastic house to produce some F1 seeds. Six parental genotypes and their fifteen hybrids were evaluated in open field in the two summer successive seasons 2021 and 2022. Significant differences among genotypes were observed in mean performance for all studied characters. Highly significant differences for general and specific combining abilities were found for all studied characters. Estimates of general combining ability effects showed that the line 220-2 (P3) was the best combiner for most studied characters i.e. days to female flower anthesis, average fruit weight, fruit length, fruit diameter and total yield/plant followed by the lines 202-2 (P1) and 264 (P4). Certain crosses had high SCA effect values for certain traits. For specific combining ability effects, the best crosses were P1×P3, P1×P6, P1×P2 and P2×P3 since they showed significant SCA effect values for number of days to anthesis of first female flower, early yield /plant and total yield / plant. For heterosis effects all crosses indicated desirable positive MP heterosis ranged from 23.80 (P2×P5) to 147.83 % (P3×P4) and all crosses indicated desirable positive HP heterosis ranged from 18.18 (P2×P5) to 137.50 % (P3×P4) except the cross (P1×P4) for early yield / plant. For total yield/ plant all crosses indicated desirable positive MP and HP heterosis except three crosses i.e. P2×P5, P4×P6 and P5×P6. MP heterosis ranged from 39.28 (P1×P4) to 152.11 % (P2×P4) and HP heterosis ranged from 32.79 (P1×P4) to 127.31 % (P2×P4). The presence of desirable heterosis in yield and its components encourage using F1 hybrids in commercial production.

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“…These results are in agreement with those of Obiadalla-Ali ( 2006), Tamil et al, (2012) and El- Adl et al, (2014).…”

Section: Average Degree Of Heterosissupporting

confidence: 93%

“…2003 andLopez-Anido et al, 2004). Furthermore, El-Adl et al, 2014, Habiba et al, 2015and Soliman 2018 estimated heterosis for some economical characters and high yield in summer squash. They detected heterosis over mid-parents and over its better parents for all traits.…”

Section: Introductionmentioning

confidence: 99%

Genetics analysis, combining ability and heterosis of some yield and yield component traits in summer squash (Cucurbita pepo L.)

Soliman

2022

Menoufia Journal of Plant Production

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“…To separate out the components of genetic variance and their ratios for all studied traits, the data were further subjected to the diallel analysis proposed by [ 17 ], although the F 1 data do not entirely obey the simple additivity/dominance model in some traits where the authors in [ 17 , 32 ] stated that it is possible to make estimates of parameters of genetic components even in case of partial failure of the diallel assumptions. The value ( H 1 / D ) 1/2 was more than unity for most studied traits indicating the presence of overdominance.…”

Section: Discussionmentioning

confidence: 99%

“…Heterosis exploitation is firstly dependent on the screening and selection of available germplasm that could be produced by better combinations of important traits [ 12 ]. Heterosis breeding is based on the identification of the parents and their cross combinations producing the highest level of transgressive segregates [ 13 – 17 ]. The choice of the best parental matings is crucial for the development of superior hybrids.…”

Section: Introductionmentioning

confidence: 99%

Genetic Components Derived Parameters and Heterosis in Okra under Saudi Arabia Conditions

Abdelkader,

Mahmoud,

Diyasty

et al. 2024

Genetics Research

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Four parental genotypes of okra were crossed in complete diallel design to study the direction and extent of relative heterosis and heterobeltiosis for yield and its associated traits for utilization of existing genetic diversity to develop heterotic F1 hybrids in okra. The additive genetic component (D) was significant in all studied traits except average pod weight. Nonadditive (H1 and H2) components were found to be significant in all studied traits. However, the values of the dominant effect (H1) were smaller than the D components for no. of nodes/plant, no. of pods/plant, weight of medium pods, weight of large pods, and total fresh pod yield. The maximum significant MP heterosis in the desirable direction (149.9%) was recorded for the weight of large pods/plot. The maximum significant heterobeltiosis in the desirable direction (120.1%) was recorded for the weight of small pods/plot followed by total fresh pod yield (107.4%), the weight of large pods/plot (104.9%), weight of medium pods/plot (92.1%), average pod weight (51.8%), number of pods/plant (38.4%), and plant height (34.3%). It could be concluded that plant height, average pod weight, and the number of branches could be considered for the development of elite hybrids (heterosis breeding) or inbred lines (pure line selection) in succeeding generations. Therefore, these parameters can be considered for selecting genotypes to improve the pod yield of okra. The superior crosses identified through heterosis analysis were Egyptian Balady × Line 4.1.18 (30.8 ton/ha), Line 4.1.18 × Egyptian Balady (29.8 ton/ha), Dwarf Green Long Pod × Line 4.1.18 (28.3 ton/ha), and Egyptian Balady × Dwarf Green Long Pod (27.6 ton/ha) as these crosses had high performance as well as significant and higher estimates of heterobeltiosis for fruit yield per plant and yield attributing other characters.

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Manifestation of Heterosis and Genetic Parameters Associated With It for Some Vegetative and Earliness Traits in Squash

Cited by 2 publications

References 0 publications

Genetics analysis, combining ability and heterosis of some yield and yield component traits in summer squash (Cucurbita pepo L.)

Genetics analysis, combining ability and heterosis of some yield and yield component traits in summer squash (Cucurbita pepo L.)

Genetic Components Derived Parameters and Heterosis in Okra under Saudi Arabia Conditions

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