Dynamics of sex expression and chromosome diversity in Cucurbitaceae: a story in the making

  title={Dynamics of sex expression and chromosome diversity in Cucurbitaceae: a story in the making},
  author={Biplab Kumar Bhowmick and Sumita Jha},
  journal={Journal of Genetics},
The family Cucurbitaceae showcases a wide range of sexual phenotypes being variedly regulated by biological and environmental factors. In the present context, we have tried to assemble reports of cytogenetic investigations carried out in cucurbits accompanied by information on sex expression diversities and chromosomal or molecular basis of sex determination in dioecious (or other sexual types, if reported) taxa known so far. Most of the Cucurbitaceae tribes have mixed sexual phenotypes with… 
Gene Interactions Regulating Sex Determination in Cucurbits
Recent advances relating to the mechanism of sex determination in cucurbits and the prospects for research in this area are discussed.
A Comparative Account of Fluorescent Banding Pattern in the Karyotypes of Two Indian Luffa Species
This study provides a chromosomal dataset of the Indian Luffa germplasm that may be utilized for genome research and programmed breeding strategies, and the conservation of banding patterns between the species raises the possibility to revise genomic kin-ships and evolutionary distance.
Molecular cloning, characterization and expression analysis of MADS-box genes associated with reproductive development in Momordica dioica Roxb.
Overall, these are the first set of MADS-box genes from M. dioica exhibiting a differential expression pattern during floral development, and will provide valuable information for further functional studies of candidate MADS -box genes in the sexual dimorphism of this economically important dioecious cucurbit.
Genome-Wide Identification and Classification of the AP2/EREBP Gene Family in the Cucurbitaceae Species
In silico expression profiling using RNA-Seq data revealed diverse expression patterns of cucumber AP2/EREBP genes, which will be valuable for understanding the stress response mechanism as well as facilitating molecular breeding in Cucurbitaceae crops.
Draft genome sequence of bitter gourd (Momordica charantia), a vegetable and medicinal plant in tropical and subtropical regions
  • N. Urasaki, H. Takagi, H. Matsumura
  • Medicine, Biology
    DNA research : an international journal for rapid publication of reports on genes and genomes
  • 2017
Comparative analysis of genome sequences and predicted genes determined that putative trypsin-inhibitor and ribosome-inactivating genes were distinctive in the bitter gourd genome, which could characterize the bittergourd as a medicinal plant.
Karyomorphological studies of six commercially cultivated edible cucurbits: bitter gourd, sponge gourd, ridge gourd, snake gourd, ash gourd and cucumber
The karyomorphological analysis of six commercially cultivated edible species of Cucurbitaceae, namely Luffa cylindrica, L. acutangula, Trichosanthes anguina, Benincasa hispida, Cucumis sativus and Momordica charantia, showed symmetric karyotypes, having both metacentric and sub-metacentric chromosomes.
Doses and number of applications of ethephon in sex reversal of zucchini squash flowers
Ethephon influenced the sexual expression of zucchini, but not enough to achieve complete sex reversal, and might be a useful tool for zuc squash breeding programs.
Genetically Modified Crops: Current Status, Prospects and Challenges Volume 1
Though a large number of candidate genes including transcription factors have been transferred for conferring diverse agronomic traits, majority of them have not been tested in the open fields and not released for the consumption of general public.


Sex determination in dioecious species of plants
Evidences suggest that the change from bisexuality to unisexuality and homomorphicity to heteromorphicity in chromosomes had been a short step in evolution possibly occurring in the recent past.
Sex Linked Polypeptides in Dioecious Momordica dioica
Electrophoretic study of soluble protein patterns from the vegetative reproductive organ of dioecious M. dioica, was carried out to compare the protein profiles of the male and female plants, and a study on the antigenic response of a 22 kD polypeptide found in female sex to determine the sex specificity of the resolved polyPEptide is reported.
Plant sex chromosomes: molecular structure and function
Sequence analysis of larger regions in the homomorphic X and Y chromosomes of papaya and asparagus, and also in the heteromorphic sex chromosomes of S. latifolia and R. acetosa, will reveal the degenerative changes that the Y-linked gene functions have experienced during sex chromosome evolution.
Sex Determination in the Monoecious Species Cucumber Is Confined to Specific Floral Whorls
These homeotic mutants from cucumber reveal two important concepts that govern sex determination in cucumber, including the arrest of either male or female organ development is dependent on their positions in the flower and is not associated with their sexual identity.
Sex determination and the evolution of dioecy from monoecy in Sagittaria latifolia (Alismataceae)
  • M. Dorken, S. Barrett
  • Biology
    Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 2004
The genetic and environmental determinants of sex in Sagittaria latifolia, a species with both monoecious and dioecious populations, are investigated and results are consistent with predictions for the evolution of dioECy via gynodioecy, rather than the expected monoecy–paradioecY pathway.
Morphological analysis in M. dioica reveals that, both sexes are morphologically identical and have 2n=28 chromosomes and the karyotype is symmetric with homomorphic median chromosomes with one pair of SAT-chromosomes.
An analysis of interspecific hybrids and phylogenetic implications inCucumis (Cucurbitaceae)
A collective evaluation of data suggests that there are three broad groups of species, one of the spiny fruited interfertile species, whose hybrids show varying degree of chromosome associations and low to high pollen fertility; the second of species with non-spiny fruits, which are completely incompatible with the former but weakly compatible with the cultivated species,C.
Sex Mechanism in Coccinia indica Wight and Arn.
The present note is based on the results of a critical cytological investigation of different sex types, such as the diploid male and female, the gynodiœcious form and a triploids male of C. indica.
Cytological, Cytochemical and Electrophoretic Distinction of a Dioecious Cucurbit, Coccinia indica
Differences in the isoesterase pattern obtained in the vegetative reproductive structure indicate that it could also be used as an important biochemical marker for identification of sexes.
Flower development, pollen fertility and sex expression analyses of three sexual phenotypes of Coccinia grandis
The experimental findings together with all other previous chromosomal and molecular cytogenetical data strongly support the view that C. grandis could be used as a potential model system to study sex expression in dioecious flowering plant.