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  1. Book ; Online: Translational Research for Cucurbit Molecular Breeding: Traits, Markers, and Genes

    Weng, Yiqun / Levi, Amnon / Garcia-Mas, Jordi / Luan, Feishi

    2020  

    Keywords Science: general issues ; Botany & plant sciences ; Cucurbits ; Molecular Breeding ; Marker-Trait Association ; Genetics ; Translational Genomics
    Size 1 electronic resource (260 pages)
    Publisher Frontiers Media SA
    Document type Book ; Online
    Note English ; Open Access
    HBZ-ID HT021230900
    ISBN 9782889662333 ; 2889662330
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: Alternative Splicing of NAC Transcription Factor Gene

    Shen, Qiong / Weng, Yiqun

    Genes

    2023  Volume 14, Issue 5

    Abstract: In pumpkin ( ...

    Abstract In pumpkin (
    MeSH term(s) Cucurbita/genetics ; Alternative Splicing ; Plant Breeding ; Seeds/metabolism ; Mutation ; Transcription Factors/metabolism
    Chemical Substances Transcription Factors
    Language English
    Publishing date 2023-04-23
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2527218-4
    ISSN 2073-4425 ; 2073-4425
    ISSN (online) 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes14050962
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Alternative Splicing of NAC Transcription Factor Gene CmNST1 Is Associated with Naked Seed Mutation in Pumpkin, Cucurbita moschata

    Shen, Qiong / Weng, Yiqun

    Genes (Basel). 2023 Apr. 23, v. 14, no. 5

    2023  

    Abstract: In pumpkin (Cucurbita moschata), the naked or hull-less seed phenotype has great benefits for breeding this crop for oil or snack use. We previously identified a naked seed mutant in this crop. In this study, we report genetic mapping, identification, ... ...

    Abstract In pumpkin (Cucurbita moschata), the naked or hull-less seed phenotype has great benefits for breeding this crop for oil or snack use. We previously identified a naked seed mutant in this crop. In this study, we report genetic mapping, identification, and characterization of a candidate gene for this mutation. We showed that the naked seed phenotype is controlled by a single recessive gene (N). The bulked segregant analysis identified a 2.4 Mb region on Chromosome 17 with 15 predicted genes. Multiple lines of evidence suggested that CmoCh17G004790 is the most probable candidate gene for the N locus which encodes a NAC transcription factor WALL THICKENING PROMOTING FACTOR 1 (CmNST1). No nucleotide polymorphism or structural variation was found in the genomic DNA sequences of CmNST1 between the mutant and the wildtype inbred line (hulled seed). However, the cDNA sequence cloned from developing seed coat samples of the naked seed mutant was 112 bp shorter than that from the wildtype which is due to seed coat-specific alternative splicing in the second exon of the mutant CmNST1 transcript. The expression level of CmNST1 in the developing seed coat was higher in the mutant than in the wildtype during early seed coat development which was reversed later. Transcriptomic profiling with RNA-Seq at different stages of seed development in the mutant and wildtype revealed a critical role of CmNST1 as a master regulator for the lignin biosynthesis pathway during seed coat development while other NAC and MYB transcription factors were also involved in forming a regulatory network for the building of secondary cell walls. This work provides a novel mechanism for the well-characterized NST1 transcription factor gene in regulating secondary cell wall development. The cloned gene also provides a useful tool for marker-assisted breeding of hull-less C. moschata varieties.
    Keywords Cucurbita moschata ; DNA ; biosynthesis ; cell walls ; exons ; inbred lines ; lignin ; loci ; mutants ; mutation ; oils ; phenotype ; pumpkins ; recessive genes ; seed coat ; seed development ; sequence analysis ; transcription factors ; transcriptomics
    Language English
    Dates of publication 2023-0423
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2527218-4
    ISSN 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes14050962
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Functional copy number variation of CsSHINE1 is associated with fruit skin netting intensity in cucumber, Cucumis sativus

    Zhang, Huijun / Wang, Yuhui / Tan, Junyi / Weng, Yiqun

    Theoretical and applied genetics. 2022 June, v. 135, no. 6

    2022  

    Abstract: Fruit skin netting in cucumber (Cucumis sativus) is associated with important fruit quality attributes. Two simply inherited genes H (Heavy netting) and Rs (Russet skin) control skin netting, but their molecular basis is unknown. Here, we reported map- ... ...

    Abstract Fruit skin netting in cucumber (Cucumis sativus) is associated with important fruit quality attributes. Two simply inherited genes H (Heavy netting) and Rs (Russet skin) control skin netting, but their molecular basis is unknown. Here, we reported map-based cloning and functional characterization of the candidate gene for the Rs locus that encodes CsSHINE1 (CsSHN1), an AP2 domain containing ethylene-responsive transcription factor protein. Comparative phenotypic analysis in near-isogenic lines revealed that fruit with netted skin had different epidermal structures from that with smooth skin including thicker cuticles, smaller, palisade-shaped epidermal and sub-epidermal cells with heavily suberized and lignified cell walls, higher peroxidase activities, which suggests multiple functions of CsSHN1 in regulating fruit skin netting and epidermal cell patterning. Among three representative cucumber inbred lines, three haplotypes at three polymorphic sites were identified inside CsSHN1: a functional copy in Gy14 (wild type) with light fruit skin netting, a copy number variant with two tandemly arrayed functional copies in WI7120 with heavy skin netting, and a loss-of-function copy in 9930 with smooth skin. The expression level of CsSHN1 in fruit exocarp of three lines was positively correlated with the skin netting intensity. Comparative analysis between cucumber and melon revealed conserved and divergent genetic mechanisms underlying fruit skin netting/reticulation that may reflect the different selection histories in the two crops. A discussion was made on genetic basis of fruit skin netting in the context of natural and artificial selections of fruit quality-related epidermal features during cucumber breeding
    Keywords Cucumis sativus ; copy number variation ; cucumbers ; exocarp ; fruit quality ; genes ; haplotypes ; loci ; loss-of-function mutation ; melons ; peroxidase ; phenotype ; suberization ; transcription factors
    Language English
    Dates of publication 2022-06
    Size p. 2101-2119.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 2170-2
    ISSN 1432-2242 ; 0040-5752
    ISSN (online) 1432-2242
    ISSN 0040-5752
    DOI 10.1007/s00122-022-04100-4
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Functional copy number variation of CsSHINE1 is associated with fruit skin netting intensity in cucumber, Cucumis sativus.

    Zhang, Huijun / Wang, Yuhui / Tan, Junyi / Weng, Yiqun

    TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

    2022  Volume 135, Issue 6, Page(s) 2101–2119

    Abstract: Fruit skin netting in cucumber (Cucumis sativus) is associated with important fruit quality attributes. Two simply inherited genes H (Heavy netting) and Rs (Russet skin) control skin netting, but their molecular basis is unknown. Here, we reported map- ... ...

    Abstract Fruit skin netting in cucumber (Cucumis sativus) is associated with important fruit quality attributes. Two simply inherited genes H (Heavy netting) and Rs (Russet skin) control skin netting, but their molecular basis is unknown. Here, we reported map-based cloning and functional characterization of the candidate gene for the Rs locus that encodes CsSHINE1 (CsSHN1), an AP2 domain containing ethylene-responsive transcription factor protein. Comparative phenotypic analysis in near-isogenic lines revealed that fruit with netted skin had different epidermal structures from that with smooth skin including thicker cuticles, smaller, palisade-shaped epidermal and sub-epidermal cells with heavily suberized and lignified cell walls, higher peroxidase activities, which suggests multiple functions of CsSHN1 in regulating fruit skin netting and epidermal cell patterning. Among three representative cucumber inbred lines, three haplotypes at three polymorphic sites were identified inside CsSHN1: a functional copy in Gy14 (wild type) with light fruit skin netting, a copy number variant with two tandemly arrayed functional copies in WI7120 with heavy skin netting, and a loss-of-function copy in 9930 with smooth skin. The expression level of CsSHN1 in fruit exocarp of three lines was positively correlated with the skin netting intensity. Comparative analysis between cucumber and melon revealed conserved and divergent genetic mechanisms underlying fruit skin netting/reticulation that may reflect the different selection histories in the two crops. A discussion was made on genetic basis of fruit skin netting in the context of natural and artificial selections of fruit quality-related epidermal features during cucumber breeding.
    MeSH term(s) Cucumis sativus/genetics ; DNA Copy Number Variations ; Fruit/genetics ; Genes, Plant ; Phenotype ; Plant Breeding
    Language English
    Publishing date 2022-05-07
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2170-2
    ISSN 1432-2242 ; 0040-5752
    ISSN (online) 1432-2242
    ISSN 0040-5752
    DOI 10.1007/s00122-022-04100-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Sigma factor binding protein 1 (CsSIB1) is a putative candidate of the major-effect QTL dm5.3 for downy mildew resistance in cucumber (Cucumis sativus).

    Tan, Junyi / Wang, Yuhui / Dymerski, Ronald / Wu, Zhiming / Weng, Yiqun

    TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

    2022  Volume 135, Issue 12, Page(s) 4197–4215

    Abstract: Key message: The dm5.3 major-effect QTL in cucumber encodes a homolog of Arabidopsis sigma factor binding protein 1 (CsSIB1). CsSIB1 positively regulates defense responses against downy mildew in cucumber through the salicylic acid (SA) biosynthesis/ ... ...

    Abstract Key message: The dm5.3 major-effect QTL in cucumber encodes a homolog of Arabidopsis sigma factor binding protein 1 (CsSIB1). CsSIB1 positively regulates defense responses against downy mildew in cucumber through the salicylic acid (SA) biosynthesis/signaling pathway. Downy mildew (DM) caused by the oomycete pathogen Pseudoperonospora cubensis is an important disease of cucumber and other cucurbits. Our knowledge on molecular mechanisms of DM resistance is still limited. In this study, we reported identification and functional characterization of the candidate gene for the major-effect QTL, dm5.3 for DM resistance originated from PI 197088. The dm5.3 QTL was Modelized through marker-assisted development of near isogenic lines (NILs). NIL-derived segregating populations were used for fine mapping which narrowed the dm5.3 locus down to a 144 kb region. Based on multiple lines of evidence, we show that CsSIB1 (CsGy5G027140) that encodes the VQ motif-containing sigma factor binding protein 1 as the most likely candidate for dm5.3. Local association analysis identified a haplotype consisting of 7 SNPs inside the coding and promoter region of CsSIB1 that was associated with DM resistance. Expression of CsSIB1 was up-regulated with P. cubensis infection. Transcriptome profiling of NILs in response to P. cubensis inoculation revealed key players and associated gene networks in which increased expression of CsSIB1 antagonistically promoted salicylic acid (SA) but suppressed jasmonic acid (JA) biosynthesis/signaling pathways. Our work provides novel insights into the function of CsSIB1/dm5.3 as a disease resistance (R) gene. The roles of sigma factor binding protein genes in pathogen defense in cucumber were also discussed.
    Language English
    Publishing date 2022-09-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2170-2
    ISSN 1432-2242 ; 0040-5752
    ISSN (online) 1432-2242
    ISSN 0040-5752
    DOI 10.1007/s00122-022-04212-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Genome-wide identification and characterization of parthenocarpic fruit set-related gene homologs in cucumber (Cucumis sativus L.).

    Kaur, Harleen / Manchanda, Pooja / Kumar, Pankaj / Dhall, Rajinder Kumar / Chhuneja, Parveen / Weng, Yiqun

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 2403

    Abstract: Cucumber (Cucumis sativus L.), a major horticultural crop, in the family Cucurbitaceae is grown and consumed globally. Parthenocarpy is an ideal trait for many fruit and vegetables which produces seedless fruit desired by consumers. The seedlessness ... ...

    Abstract Cucumber (Cucumis sativus L.), a major horticultural crop, in the family Cucurbitaceae is grown and consumed globally. Parthenocarpy is an ideal trait for many fruit and vegetables which produces seedless fruit desired by consumers. The seedlessness occurs when fruit develops without fertilization which can be either natural or induced. So far, a limited number of genes regulating parthenocarpic fruit set have been reported in several fruit or vegetable crops, most of which are involved in hormone biosynthesis or signalling. Although parthenocarpic cucumber has been widely used in commercial production for a long time; its genetic basis is not well understood. In this study, we retrieved thirty five parthenocarpy fruit-set related genes (PRGs) from bibliomic data in various plants. Thirty-five PRG homologs were identified in the cucumber genome via homology-based search. An in silico analysis was performed on phylogenetic tree, exon-intron structure, cis-regulatory elements in the promoter region, and conserved domains of their deduced proteins, which provided insights into the genetic make-up of parthenocarpy-related genes in cucumber. Simple sequence repeat (SSR) sequences were mined in these PRGs, and 31 SSR markers were designed. SSR genotyping identified three SSRs in two polymorphic genes. Quantitative real-time PCR of selected genes was conducted in five cucumber lines with varying degrees of parthenocarpic fruit set capacities, which revealed possible association of their expression with parthenocarpy. The results revealed that homologs CsWD40 and CsPIN-4 could be considered potential genes for determination of parthenocarpy as these genes showed parental polymorphism and differential gene expression in case of parthenocarpic and non-parthenocarpic parents.
    MeSH term(s) Fruit/genetics ; Cucumis sativus/metabolism ; Phylogeny ; Genes, Plant ; Polymorphism, Genetic
    Language English
    Publishing date 2023-02-10
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-29660-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Improving Agrobacterium tumefaciens−Mediated Genetic Transformation for Gene Function Studies and Mutagenesis in Cucumber (Cucumis sativus L.)

    Liu, Hanqiang / Zhao, Jianyu / Chen, Feifan / Wu, Zhiming / Tan, Junyi / Nguyen, Nhien Hao / Cheng, Zhihui / Weng, Yiqun

    Genes (Basel). 2023 Feb. 27, v. 14, no. 3

    2023  

    Abstract: In the post−genomics era, Agrobacterium tumefaciens−mediated genetic transformation is becoming an increasingly indispensable tool for characterization of gene functions and crop improvement in cucumber (Cucumis sativus L.). However, cucumber ... ...

    Abstract In the post−genomics era, Agrobacterium tumefaciens−mediated genetic transformation is becoming an increasingly indispensable tool for characterization of gene functions and crop improvement in cucumber (Cucumis sativus L.). However, cucumber transformation efficiency is still low. In this study, we evaluated the effects of several key factors affecting the shoot−regeneration rate and overall transformation efficiency in cucumber including genotypes, the age and sources of explants, Agrobacterium strains, infection/co−cultivation conditions, and selective agents. We showed that in general, North China cucumbers exhibited higher shoot−regeneration rate than US pickling or slicing cucumbers. The subapical ground meristematic regions from cotyledons or the hypocotyl had a similar shoot−regeneration efficiency that was also affected by the age of the explants. Transformation with the Agrobacterium strain AGL1 yielded a higher frequency of positive transformants than with GV3101. The antibiotic kanamycin was effective in selection against non−transformants or chimeras. Optimization of various factors was exemplified with the development of transgenic plants overexpressing the LittleLeaf (LL) gene or RNAi of the APRR2 gene in three cucumber lines. The streamlined protocol was also tested in transgenic studies in three additional genes. The overall transformation efficiency defined by the number of verified transgenic plants out of the number of seeds across multiple experiments was 0.2–1.7%. Screening among T₁ OE transgenic plants identified novel, inheritable mutants for leaf or fruit color or size/shape, suggesting T−DNA insertion as a potential source of mutagenesis. The Agrobacterium−mediated transformation protocol from this study could be used as the baseline for further improvements in cucumber transformation.
    Keywords Agrobacterium radiobacter ; Cucumis sativus ; cucumbers ; fruit color ; genes ; genetic transformation ; genetically modified organisms ; hypocotyls ; kanamycin ; leaves ; meristems ; mutagenesis ; China
    Language English
    Dates of publication 2023-0227
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2527218-4
    ISSN 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes14030601
    Database NAL-Catalogue (AGRICOLA)

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  9. Article ; Online: A 5.5-kb LTR-retrotransposon insertion inside phytochrome B gene (CsPHYB) results in long hypocotyl and early flowering in cucumber (Cucumis sativus L.)

    Hu, Liangliang / Zhang, Miaomiao / Shang, Jingjing / Liu, Zichen / Weng, Yiqun / Yue, Hongzhong / Li, Yuhong / Chen, Peng

    Theor Appl Genet. 2023 Apr., v. 136, no. 4 p.68-68

    2023  

    Abstract: KEY MESSAGE: The novel spontaneous long hypocotyl and early flowering (lhef) mutation in cucumber is due to a 5551-bp LTR-retrotransposon insertion in CsPHYB gene encoding PHYTOCHROME B, which plays a major role in regulating photomorphogenic hypocotyl ... ...

    Abstract KEY MESSAGE: The novel spontaneous long hypocotyl and early flowering (lhef) mutation in cucumber is due to a 5551-bp LTR-retrotransposon insertion in CsPHYB gene encoding PHYTOCHROME B, which plays a major role in regulating photomorphogenic hypocotyl growth and flowering. Hypocotyl length and flowering time are important for establishing high-quality seedlings in modern cucumber production, but little is known for the underlying molecular mechanisms of these two traits. In this study, a spontaneous cucumber long hypocotyl and early flowering mutant was identified and characterized. Based on multiple lines of evidence, we show that cucumber phytochrome B (CsPHYB) is the candidate gene for this mutation, and a 5551-bp LTR-retrotransposon insertion in the first exon of CsPHYB was responsible for the mutant phenotypes. Uniqueness of the mutant allele at CsPHYB was verified in 114 natural cucumber lines. Ectopic expression of the CsPHYB in Arabidopsis phyB mutant rescued the long hypocotyl and early flowering phenotype of phyB-9 mutant. The wild-type CsPHYB protein was localized on the membrane and cytoplasm under white light condition, whereas in the nucleus under red light, it is consistent with its roles as a red-light photoreceptor in Arabidopsis. However, the mutant csphyb protein was localized on the membrane and cytoplasm under both white and red-light conditions. Expression dynamics of CsPHYB and several cell elongation-related genes were positively correlated with hypocotyl elongation; the transcription levels of key positive and negative regulators for flowering time were also consistent with the anthesis dates in the mutant and wild-type plants. Yeast two hybrid and bimolecular fluorescence complementation assays identified physical interactions between CsPHYB and phytochrome interacting factor 3/4 (CsPIF3/4). These findings will provide new insights into the roles of the CsPHYB in cucumber hypocotyl growth and flowering time.
    Keywords Arabidopsis ; Cucumis sativus ; alleles ; cucumbers ; cytoplasm ; exons ; flowering ; fluorescence ; hybrids ; hypocotyls ; mutants ; mutation ; phenotype ; photoreceptors ; phytochrome ; red light ; white light ; yeasts
    Language English
    Dates of publication 2023-04
    Size p. 68.
    Publishing place Springer Berlin Heidelberg
    Document type Article ; Online
    ZDB-ID 2170-2
    ISSN 1432-2242 ; 0040-5752
    ISSN (online) 1432-2242
    ISSN 0040-5752
    DOI 10.1007/s00122-023-04271-8
    Database NAL-Catalogue (AGRICOLA)

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  10. Article: Epidermal Patterning Factor 2-like (McEPFL2): A Putative Candidate for the Continuous Ridge (cr) Fruit Skin Locus in Bitter Gourd (Momordica charantia L.)

    Yang, Jing / Weng, Yiqun / Li, Huihong / Kong, Qiusheng / Wang, Weiluan / Yan, Chenghuan / Wang, Liping

    Genes. 2022 June 25, v. 13, no. 7

    2022  

    Abstract: Bitter gourd (Momordica charantia L.) is an economically important vegetable and medicinal crop in many Asian countries. Limited work has been conducted in understanding the genetic basis of horticulturally important traits in bitter gourd. Bitter gourd ... ...

    Abstract Bitter gourd (Momordica charantia L.) is an economically important vegetable and medicinal crop in many Asian countries. Limited work has been conducted in understanding the genetic basis of horticulturally important traits in bitter gourd. Bitter gourd is consumed primarily for its young, immature fruit, and fruit appearance plays an important role in market acceptability. One such trait is the ridges on the fruit skin. In the present study, molecular mapping of a locus underlying fruit ridge continuity was conducted. Genetic analysis in segregating populations, derived from the crosses between two inbred lines Y1 with continuous ridges (CR) and Z-1-4 with discontinuous ridges (DCR), suggested that CR was controlled by a single recessive gene (cr). High-throughput genome sequencing of CR and DCR bulks combined with high-resolution genetic mapping in an F₂ population delimited cr into a 108 kb region with 16 predicted genes. Sequence variation analysis and expression profiling supported the epidermal patterning factor 2-like (McEPFL2) gene as the best candidate of the cr locus. A 1 bp deletion in the first exon of McEPFL2 in Y1 which would result in a truncated McEPFL2 protein may be the causal polymorphism for the phenotypic difference between Y1 and Z-1-4. The association of this 1 bp deletion with CR was further supported by gDNA sequencing of McEPFL2 among 31 bitter gourd accessions. This work provides a foundation for understanding the genetic and molecular control of fruit epidermal pattering and development, which also facilitates marker-assisted selection in bitter melon breeding.
    Keywords Momordica charantia ; exons ; fruits ; genetic analysis ; loci ; markets ; phenotype ; recessive genes ; sequence diversity ; vegetables
    Language English
    Dates of publication 2022-0625
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2527218-4
    ISSN 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes13071148
    Database NAL-Catalogue (AGRICOLA)

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