Genetic variability studies for horticultural traits in muskmelon (Cucumis melo L.)

Abstract Oriental melon (Cucumis melo L. var. makuwa) is one of the most important cultivated cucurbits, and is grown widely in Northeast Asian countries. With increasing interest in its biological properties and economic importance, oriental melon has become an attractive model crop for studying various horticultural traits. A previous genome sequence of the melon was constructed from a homozygous double-haploid line. Thus, individual reference genomes are required to perform functional studies and further breeding applications. Here, we report draft genome sequences of two oriental melons, Chang Bougi and SW3. The assembled 344 Mb genome of Chang Bougi was obtained with scaffold N50 1.0 Mb, and 36,235 genes were annotated. The 354 Mb genome of SW3 was assembled with scaffold N50 1.6 Mb, and has 38,173 genes. These newly constructed genomes will enable studies of fruit development, disease resistance, and breeding applications in the oriental melon.

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The importance of Hungarian melon (Cucumis melo L.) landraces, local types and old varieties (Review)

International Journal of Horticultural Science ◽

10.31421/ijhs/11/4/611 ◽

2005 ◽

Vol 11 (4) ◽

Cited By ~ 2

Author(s):

Cs. Szamosi

Keyword(s):

Genetic Variability ◽

Marketing Strategy ◽

Organic Farming ◽

Cucumis Melo ◽

Careful Selection ◽

Gene Banks ◽

The One ◽

Cucumis Melo L ◽

Day By Day ◽

Quality Features

While supermarkets devote whole aisles to hybrids, traditional varieties are hard to find, and becoming scarcer day by day. Unfortunately, countless old melon varieties have already been lost. Luckily we succeded in collecting most of these varieties, and thus conserving them in Gene Banks. Landraces, local types, and old breed races show many characteristics that could be useful in organic farming. It is important to get acquainted with these varieties and cultivars, because they have greatly adapted to the climatic and pedological conditions of the Carpathian basin. Therefore their conservation is essential for the protection of Hungarian genetic variability. With the help of utilising our landraces in organic farming; careful selection; and the usage of marketing strategy in order to enhance quality features, such as unique flavour; we could reclaim the one-time excellent reputation of Hungarian melon.

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Studies on Genetic Variability, Heritability and Genetic Advance in Oriental Pickling Melon (Cucumis melo L. var. conomon) Genotypes

International Journal of Pure & Applied Bioscience ◽

10.18782/2320-7051.6933 ◽

2018 ◽

Vol 6 (5) ◽

pp. 1042-1047

Author(s):

Ramesh Babu R. ◽

Keyword(s):

Genetic Variability ◽

Cucumis Melo ◽

Genetic Advance ◽

Cucumis Melo L

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Genetic variability, heritability and genetic advance of melons from different botanical groups (Cucumis melo L.)

International Journal of Chemical Studies ◽

10.22271/chemi.2020.v8.i4ac.10015 ◽

2020 ◽

Vol 8 (4) ◽

pp. 2532-2537

Author(s):

Chaitra S ◽

Shivapriya M ◽

Ravishankar KV ◽

Jyothi Kattegoudar ◽

Sadanand GK ◽

...

Keyword(s):

Genetic Variability ◽

Cucumis Melo ◽

Genetic Advance ◽

Cucumis Melo L

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Genome-Wide SNP Markers for Genotypic and Phenotypic Differentiation of Melon (Cucumis melo L.) Varieties Using Genotyping-by-Sequencing

International Journal of Molecular Sciences ◽

10.3390/ijms22136722 ◽

2021 ◽

Vol 22 (13) ◽

pp. 6722

Author(s):

Do Yoon Hyun ◽

Raveendar Sebastin ◽

Gi-An Lee ◽

Kyung Jun Lee ◽

Seong-Hoon Kim ◽

...

Keyword(s):

Genetic Variability ◽

Cucumis Melo ◽

Systematic Approach ◽

Genome Wide Association Study ◽

Genotyping By Sequencing ◽

Snp Markers ◽

Phenotypic Traits ◽

Nucleotide Polymorphisms ◽

Genome Wide ◽

Cucumis Melo L

Melon (Cucumis melo L.) is an economically important horticultural crop with abundant morphological and genetic variability. Complex genetic variations exist even among melon varieties and remain unclear to date. Therefore, unraveling the genetic variability among the three different melon varieties, muskmelon (C. melo subsp. melo), makuwa (C. melo L. var. makuwa), and cantaloupes (C. melo subsp. melo var. cantalupensis), could provide a basis for evolutionary research. In this study, we attempted a systematic approach with genotyping-by-sequencing (GBS)-derived single nucleotide polymorphisms (SNPs) to reveal the genetic structure and diversity, haplotype differences, and marker-based varieties differentiation. A total of 6406 GBS-derived SNPs were selected for the diversity analysis, in which the muskmelon varieties showed higher heterozygote SNPs. Linkage disequilibrium (LD) decay varied significantly among the three melon varieties, in which more rapid LD decay was observed in muskmelon (r2 = 0.25) varieties. The Bayesian phylogenetic tree provided the intraspecific relationships among the three melon varieties that formed, as expected, individual clusters exhibiting the greatest genetic distance based on the posterior probability. The haplotype analysis also supported the phylogeny result by generating three major networks for 48 haplotypes. Further investigation for varieties discrimination allowed us to detect a total of 52 SNP markers that discriminated muskmelon from makuwa varieties, of which two SNPs were converted into cleaved amplified polymorphic sequence markers for practical use. In addition to these markers, the genome-wide association study identified two SNPs located in the genes on chromosome 6, which were significantly associated with the phenotypic traits of melon seed. This study demonstrated that a systematic approach using GBS-derived SNPs could serve to efficiently classify and manage the melon varieties in the genebank.

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Genetic variability studies in response to drought under different water regimes in muskmelon (Cucumis melo L.)

Journal of Applied and Natural Science ◽

10.31018/jans.v9i3.1432 ◽

2017 ◽

Vol 9 (3) ◽

pp. 1744-1750

Author(s):

Sheshnath Mishra ◽

A. K. Sharma ◽

Vishwanath Sharma

Keyword(s):

Genetic Variability ◽

Cucumis Melo ◽

Block Design ◽

Fruit Weight ◽

Proline Content ◽

Fruit Yield ◽

Stress Conditions ◽

Research Station ◽

Water Regimes ◽

Cucumis Melo L

A set of 40 genotypes of muskmelon (Cucumis melo L.) were evaluated in a randomized block design with two replications under different water regimes during summer 2012 at the agriculture research station Bee-chwal, Bikaner, Rajasthan, India to study genetic variability among the traits to determine selection criteria for breed-ing programmes for fruit yield and related characters. The results reported that drought stress caused reduction in fruit yield and most of the characters studied. Significant variations for all the characters were found under different water regimes (non-stress, 50% and 25%). High genotypic (GCV) and phenotypic (PCV) coefficient of variations were observed for fruit yield per plant, fruit weight per plant, vine length and proline content in non-stress, 50% and 25% water stress conditions respectively. High estimates of heritability along with high genetic advance as percent-age of mean over the characters was recorded for fruit weight (128.79, 164.05, and 161.15), proline content (42.50, 72.86 and 69.26) and fruit yield per plant (149.61, 186.91 and 184.12) in both the non-stress and stress conditions. This shows that these traits were under the control of additive genetic effects. Therefore, it was concluded that se-lection for these traits should lead rapid genetic improvement of the material.

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