[PDF] Inheritance And Molecular Marker Based Genetic Mapping Of Parthenocarpy In Cucumber Cucumis Sativus L eBook

Author :
Publisher :
Page : 191 pages
File Size : 43,38 MB
Release : 2014
Category :
ISBN :

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Parthenocarpy is a desirable trait for cucumber production and is particularly valuable in environments where pollination is difficult or adversely affected by abiotic factors. Parthenocarpic cucumber cultivars have been successfully developed, but the genetic and molecular mechanisms behind parthenocarpic expression remain largely unknown. Since parthenocarpy is often considered a yield component, it is difficult to separate the true parthenocarpic character from other yield related traits. Therefore, this study was designed to better define what is considered true parthenocarpic expression and then to use this knowledge to identify QTL associated with parthenocarpic fruit set. Building off of previous studies demonstrating that parthenocarpic fruit set is initiated in the days before and immediately after anthesis, a new approach to phenotyping parthenocarpic fruit set in cucumber focused on early fruit initiation and development was implemented. With a clear approach to phenotypic evaluation, a mapping population consisting of 205 F3 families derived from a cross between processing cucumber inbred lines `2A' (parthenocarpic) and `Gy8' (non-parthenocarpic) was evaluated for parthenocarpic fruit set. Genotypic data collected for each F2 individual was utilized to construct a linkage map consisting of 192 marker loci in seven linkage groups and covering 571.7 cM. Multiple QTL mapping methodologies (interval mapping, composite interval mapping, and multiple interval mapping) were employed to detect and construct optimal models for the inheritance of parthenocarpic fruit set. Seven additive QTL associated with parthenocarpic fruit set were detected with four identified consistently in all analyses. The four consensus QTL were located on chromosome 5 at 32.3 - 54.7 cM, chromosome 6 at 0.0 - 9.7 cM, chromosome 6 at 80.0 - 83.0 cM, and chromosome 7 at 21.8 - 32.1 cM. Bioinformatic analysis of the genomic regions harboring the four consensus QTL was conducted and multiple candidate genes were identified. A model was proposed to explain the roles of potential candidate genes in parthenocarpic expression observed in cucumber. The QTL identified for parthenocarpic fruit set by this study are valuable to cucumber breeders interested in developing parthenocarpic cultivars and to researchers interested in the genetic and molecular mechanisms of parthenocarpic fruit set.

Author : Sudhakar Pandey
Publisher : Springer Nature
Page : 211 pages
File Size : 13,15 MB
Release : 2022-01-01
Category : Science
ISBN : 3030886476

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This edited book presents the latest research on cucumber, its genetic resources and diversity, tissue culture and genetic transformation, mapping of economic genes and QTLs, whole genome sequencing, comparative genomics, and breeding strategies. The mechanism of sex expression, interspecific hybridization, and cell biology are also described. The book discusses the genome draft of cucumber and the application of genome editing. This book is useful to the students, teachers and scientists in academia and relevant private companies interested in horticulture, genetics, breeding, and related areas.

Author : Rebecca Grumet
Publisher : Springer
Page : 434 pages
File Size : 33,49 MB
Release : 2017-10-13
Category : Science
ISBN : 3319493329

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This book provides an overview of the current state of knowledge of the genetics and genomics of the agriculturally important Cucurbitaceae plant family, which includes crops such as watermelon, melon, cucumber, summer and winter squashes, pumpkins, and gourds. Recent years have resulted in tremendous increases in our knowledge of these species due to large scale genomic and transcriptomic studies and production of draft genomes for the four major species, Citrullus lanatus, Cucumis melo, Cucumis sativus, and Cucurbita spp. This text examines genetic resources and structural and functional genomics for each species group and across species groups. In addition, it explores genomic-informed understanding and commonalities in cucurbit biology with respect to vegetative growth, floral development and sex expression, fruit growth and development, and important fruit quality traits.

Author : Nisha Singh
Publisher : Frontiers Media SA
Page : 196 pages
File Size : 48,73 MB
Release : 2023-12-28
Category : Science
ISBN : 2832541860

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Recent advances in next-generation sequencing-driven mass production of genomic data and various other integrated techniques have considerably broadened and deepened our understanding of living organisms' molecular systems. Because complex quantitative traits are difficult to select due to low heritability, conventional plant breeding relies on phenotypic selection and breeder experience, it takes longer to develop a new, improved variety. For association studies to identify DNA markers linked to these complex traits, genotyping chip arrays allow genotyping of thousands of markers in a short amount of time. Plant breeding consistency and predictability have improved thanks to advances in genomics. NGS technologies bring new tools and concepts that can enhance the precision and efficiency of plant breeding such as cost-effective, high throughput genotyping technologies for sustainable agriculture. These genotyping technologies will be lowering the time and cost of developing high-quality food crops that are stress-resistant while still having a high nutritional value. This Research Topic focuses on recent advancements in NGS-related technologies, mainly the development of cost-effective high-throughput genotyping platforms with a wide range of bioinformatics tools, and possible translational multi-omics applications in crop breeding programs for sustainable agriculture.

Author : Haiping Wang
Publisher : BoD – Books on Demand
Page : 230 pages
File Size : 13,68 MB
Release : 2021-10-06
Category : Science
ISBN : 1839680237

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Cucumber is a well-known and popular vegetable because of its rich nutrient profile and versatile uses in culinary, therapeutic and cosmetic purposes. This book provides information on the plant’s origins, biology, and breeding as well as research on its economic value, utilization, cultivation, and therapeutic benefits.