Heterosis, combining ability and gene action studies for insect-pest and disease resistance in cucumber

Kumar, Ramesh; Kumar, Sandeep; Kumar, Dharminder; Kansal, Sandeep

doi:10.5958/0975-928x.2018.00102.3

Cited by 3 publications

(6 citation statements)

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“…It was reported earlier for yield and its contributing traits by Jat et al (2017) and Kumar et al (2017) and severity of downy mildew and powdery mildew diseases by Kumar et al (2018) and Das et al (2019) in cucumber. Here, gene action stated that non-additive gene action governed almost all the traits under study during both the years, hence hybrid breeding could be exploited for these traits in cucumber.…”

Section: Resultssupporting

confidence: 59%

“…Identification of good general and specific combiners: During both years study revealed that monoecious testers KTG-40, UHF-16 and gynoecious line 2870 G and K-90 exhibited significant GCA effect in desired direction indicating these were found as good general combiner for earliness, fruit yield per plant, severity of downy and powdery mildew disease traits (Kumar et al 2018, Das et al 2019.Therefore, KTG-40, 2870 G, K-90 and UHF-16 could be picked up as potential donors for yield contributing and other important horticultural traits (Table 2).…”

Section: Resultsmentioning

confidence: 99%

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Genetic assessments, dominance estimates of economic traits of gynoecious cucumber (Cucumis sativus) under Himalayas

et al. 2023

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In India generally monoecious and cross-pollinated cucumber (Cucumis sativus L.) hybrids/varieties are grown. The use of stable gynoecious cucumber varieties/hybrids would increase the productivity of cucumber in India. In the past, despite improvement in monoecious cucumber varieties/hybrids, little effort has been done into the development of stable gynoecious hybrids. To address this issue 3 genetically diverse gynoecious lines and improvement, and 6 testers were crossed in line × tester fashion to develop 18 crosses during 2017. These 18 crosses along with 9 parents evaluated at the Krishi Vigyan Kendra, Kandaghat, Himachal Pradesh and Dr. YSPUHF, Solan, Himachal Pradesh during pre-kharif season 2018–19 to determine the mode of gene action, combining ability, extent heterosis and potence ratio for 12 quantitative traits. Experimental results depicted that the dominant component of variance (σ2S) was found higher than the additive component of variance (σ2S) for all the traits indicating a predominant role of non-additive gene action governing yield and its contributing traits during both the years. Gynoecious inbred lines KTG-40, 2870G and testers K-90, UHF-16 were found most promising general combiners for fruit yield. The cross combination KTG-40 × K-90 and 2870G × K-90 isolated based on heterosis manifested and SCA effects. Further, the performance of top 7 heterotic crosses illustrate the presence of overdominance in most of the crosses for traits under study, suggesting the importance of heterosis breeding for the development of early, high-yielding, disease tolerance stable gynoecious hybrids in cucumber.

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Section: Resultssupporting

confidence: 59%

Section: Resultsmentioning

confidence: 99%

Genetic assessments, dominance estimates of economic traits of gynoecious cucumber (Cucumis sativus) under Himalayas

et al. 2023

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“…The crosses involving parents with good × good combiners revealed the additive × additive type of gene action. It was also reported by Ramesh Kumar et al (2018) in Cucumber. VL=Vine length, DFMFA=Days to first male flower anthesis, DFFFA=Days to first female flower anthesis, NPB=Number of primary branches per vine, DFH=Days to first harvest, FL=Fruit length, FW=Fruit weight, FT=Flesh thickness, FD=Fruit Diameter, NFP=Number of fruits per vine, MFY =Marketable fruit yield per vine, TSS=Total soluble solids, AA =Ascorbic acid, TC=Total chlorophyll content.…”

Section: Rajaguru Et Alsupporting

confidence: 65%

Combining ability study for yield and quality traits in cucumber (Cucumis sativus L.)

Rajaguru¹,

Arumugam²,

Kumar³

et al. 2020

EJPB

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Seven cucumber (Cucumissativus L.) genotypes (3 lines and 4 testers) were crossed in a line × tester mating design. The resultant 12 hybrids and their parents were evaluated using Randomised Block Design with two replications during Kharif 2018. Sufficient genetic variability was observed for all the characters under study. In this study, the parents L2 (Koradacherry local), T2 (Orathanadu local) and T3 (Aipatti local) exhibited high positive GCA (General Combining Ability) effects for yield related traits and high negative GCA effects for earliness characters. The parent T2 identified in this study may be used in multiple crossing programme to isolate high yielding varieties. Among the hybrid combinations, L2xT3, L1xT2 and L3xT4 expressed the maximum positive significant SCA (Specific Combining Ability) effects for yield and yield associated characters. In the above cross combinations one parent was a good combiner and the other was an average/poor combiner; hence the hybrids can be exploited for transgressive selection.

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“…Breeding for heterosis has been extensively studied in plants, and research on the heterobeltiosis of hybrid offspring in vegetables has focused mainly on yield 94 and disease resistance 29 . Wellington 95 and Tschermak 96 showed that tomato hybrids exhibit heterosis in early maturity and during yield production.…”

Section: Traits Contributing To Yield Heterosis In Vegetablesmentioning

confidence: 99%

“…Pandey et al 102 used 77 cucumber hybrid generations and their parents to study the yield heterosis and contributing traits of different cucumber hybrid varieties and found that DC–1 × B–159 and VRC–11–2 × Bihar–10 were the best hybrid combinations for yield and prematurity. Using 48 F 1 hybrids and their parents, the gene effects caused by diseases and insect pests under natural conditions 29 were investigated. The results indicated that nonadditive gene effects had a significant regulatory effect on other traits in cucumber (except morbidity caused by Drosophila), demonstrating the importance of heterosis in cucumber breeding for disease resistance.…”

Section: Traits Contributing To Yield Heterosis In Vegetablesmentioning

confidence: 99%

Molecular basis of heterosis and related breeding strategies reveal its importance in vegetable breeding

Zhang

et al. 2021

Hortic Res

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Heterosis has historically been exploited in plants; however, its underlying genetic mechanisms and molecular basis remain elusive. In recent years, due to advances in molecular biotechnology at the genome, transcriptome, proteome, and epigenome levels, the study of heterosis in vegetables has made significant progress. Here, we present an extensive literature review on the genetic and epigenetic regulation of heterosis in vegetables. We summarize six hypotheses to explain the mechanism by which genes regulate heterosis, improve upon a possible model of heterosis that is triggered by epigenetics, and analyze previous studies on quantitative trait locus effects and gene actions related to heterosis based on analyses of differential gene expression in vegetables. We also discuss the contributions of yield-related traits, including flower, fruit, and plant architecture traits, during heterosis development in vegetables (e.g., cabbage, cucumber, and tomato). More importantly, we propose a comprehensive breeding strategy based on heterosis studies in vegetables and crop plants. The description of the strategy details how to obtain F1 hybrids that exhibit heterosis based on heterosis prediction, how to obtain elite lines based on molecular biotechnology, and how to maintain heterosis by diploid seed breeding and the selection of hybrid simulation lines that are suitable for heterosis research and utilization in vegetables. Finally, we briefly provide suggestions and perspectives on the role of heterosis in the future of vegetable breeding.

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Heterosis, combining ability and gene action studies for insect-pest and disease resistance in cucumber

Cited by 3 publications

References 0 publications

Genetic assessments, dominance estimates of economic traits of gynoecious cucumber (Cucumis sativus) under Himalayas

Genetic assessments, dominance estimates of economic traits of gynoecious cucumber (Cucumis sativus) under Himalayas

Combining ability study for yield and quality traits in cucumber (Cucumis sativus L.)

Molecular basis of heterosis and related breeding strategies reveal its importance in vegetable breeding

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