Genetic evaluation of gynoecioucy in cucumber (Cucumis sativus L.) using Generation Mean Analysis method

Document Type : scientific research article

Authors

1 Ph.D. Student, Dept. of Horticultural Sciences, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran

2 Corresponding Author, Dept. of Horticultural Sciences, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran.

3 Dept. of Agronomy and Plant Breeding, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran

Abstract

Introduction: Gynociouce hybrids have the advantage of high yield; therefore, gynociouce trait should always be considered in the production of cucumber hybrid cultivars. There are at least five genes that affect the expression of gynociouce. In order to improve cucumber for production new cultivars with higher yield and better quality, using of genetic diversity and cucumber germplasm is extremely essential. Knowing the importance and extent of controller genetic effects the inheritance of traits can lead to the selection of appropriate corrective methods. Therefore, the present study took with this goal how inheritance of the gynoeciouc trait and to investigate the effects of controller genes on this trait and other performance components in cross between a commercial hybrid and a selected line, Finally a proper amendatory plan is adopted.
Material and method: In order to evaluate genetic and determinate heritability of gynoecioucy in cucumber seven generation including P1, P2, F1, F2, BC1, BC2 and F3 from a cross between two gynoeciouc and androeciouc cucumber lines N10×A11, were supplied and number of female flowers and number of male flowers, number of fruit per plant, length of plant and length of internode were evaluated in a randomized complete block design with three replications. Cause on create populations, experiments were carried out in the spring and autumn of 2017 to 2018 in three stages in the greenhouse of the college of Agricultural Sciences, University of Guilan and population assessment was performed in 1398 in the research farm of the Faculty of Agricultural Sciences, University of Guilan. First year, in order to produce hybrid seeds, a cross was made between gynoecious N10 and androecious A11 lines. After producing and cultivating hybrid seeds in the second stage, self-pollination and hybrid cross-breeding with parents were carried out and F2 populations and backcrosses were created. In the second year, samples of second generation seeds were planted in greenhouses for creating self-pollination and third-generation populations. In the greenhouse, hydroponic cultivation system was used and fertilization and irrigation of plants were did at regular intervals. In the field cultivation system, Growing Phases were carried out using drip irrigation system and cover mulch for planting and necessary agricultural care in the cultivation stages. Data normality was tested by SPSS software and data analysis was performed by SAS software. Generation mean comparison was also performed using LSD test at 5% and 1% probability levels.
Results: about the gynoecioucy there was a significant differences among case study generations. Examination of scale tests for this trait also showed that there may be inallele interactions among the genes controlling this trait. Examination of genetical parameter and doing scale tests showed for all of study traits there are different epistasis. the results showed about number of female flower all of the genetic parameters was significant and for number of male flower, number of fruit per plant and length of internode traits simple six parametric was in charge of controlhing the traits such as all of genetic parameters without dominance-dominance epistasis, whereas for length of plant trait simple six parametric model such as all of genetic parameters without additive-additive epistasis was the best of genetic model vindication for diversity.
Discussion: Evaluation of inheritance and dominance degree showed additive variance was more important in number of female flower and number of fruit per plant traits that means Superior genotypes can be select to modify these traits in the study population

Keywords

References

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Journal of Plant Production Research
Volume 29, Issue 3
November 2022
Pages 1-16

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