Gamete production | ScienceGate

Lantana (Lantana camara L., Verbenaceae) is an important ornamental crop, yet can be a highly invasive species. The formation of unreduced female gametes (UFGs) is a major factor contributing to its invasiveness and has severely hindered the development of sterile cultivars. To enrich the genomic resources and gain insight into the genetic mechanisms of UFG formation in lantana, we investigated the transcriptomes of young ovaries of two lantana genotypes, GDGHOP-36 (GGO), producing 100% UFGs, and a cultivar Landmark White Lantana (LWL), not producing UFGs. The de novo transcriptome assembly resulted in a total of 90,641 unique transcript sequences with an N50 of 1692 bp, among which, 29,383 sequences contained full-length coding sequences (CDS). There were 214 transcripts associated with the biological processes of gamete production and 10 gene families orthologous to genes known to control unreduced gamete production in Arabidopsis. We identified 925 transcription factor (TF)-encoding sequences, 91 nucleotide-binding site (NBS)-containing genes, and gene families related to drought/salt tolerance and allelopathy. These genomic resources and candidate genes involved in gamete formation will be valuable for developing new tools to control the invasiveness in L. camara, protect native lantana species, and understand the formation of unreduced gametes in plants.

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The relationship between weight and length of male broodstock with gamete production in the narrow-clawed crayfish Pontastacus leptodactylus (Eschscholtz, 1823)

Aquaculture Research ◽

10.1111/are.13982 ◽

2019 ◽

Vol 50 (4) ◽

pp. 1380-1383 ◽

Cited By ~ 3

Author(s):

Ardavan Farhadi ◽

Muzaffer Mustafa Harlıoğlu ◽

Ayşe Gül Harlıoğlu

Keyword(s):

Gamete Production ◽

The Relationship

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Longevity in Caenorhabditis elegans reduced by mating but not gamete production

Nature ◽

10.1038/379723a0 ◽

1996 ◽

Vol 379 (6567) ◽

pp. 723-725 ◽

Cited By ~ 142

Author(s):

David Gems ◽

Donald L. Riddle

Keyword(s):

Caenorhabditis Elegans ◽

Gamete Production

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Temporal patterns of gamete production within individuals of Raphanus sativus (Brassicaceae)

Canadian Journal of Botany ◽

10.1139/b90-064 ◽

1990 ◽

Vol 68 (3) ◽

pp. 480-486 ◽

Cited By ~ 29

Author(s):

Helen J. Young ◽

Maureen L. Stanton

Keyword(s):

Raphanus Sativus ◽

Female Parent ◽

Temporal Patterns ◽

Developmental Differences ◽

Pollen Size ◽

Male And Female ◽

Ovule Number ◽

Pollen Number ◽

Gamete Production ◽

Phenotypic Gender

Previous studies on the deployment of energy to male and female gametes in plants have concentrated on differences among individuals or among related species. We documented temporal patterns of sex allocation within individual wild radish plants grown under controlled conditions. Lifetime investments in pollen and ovules were determined for four unrelated individuals of Raphanus sativus L. (Brassicaceae). Each individual produced 600–1100 flowers over the approximately 5-week flowering period. Mature floral buds were collected daily and ovule number, pollen grain number, pollen size, and pollen to ovule ratio (P:O) were determined for each. Variation in these traits was partitioned into variation among plants and among dates (representing flowering sequence). There was significant variation among plants for all characters, but because plants responded differently to date for three of the characters, further analyses were performed on a plant-by-plant basis. All plants showed significant reductions in pollen number and P:O through time, three plants showed a significant reduction in pollen size with time, and two plants showed a significant reduction in ovule number with time. The observed variation in phenotypic gender among these plants was not environmentally mediated because all plants were grown together in a controlled environment and therefore the differences in allocation to gametes were due to genetic or developmental differences. A result of intraspecific variation in gamete production is that the success of each individual as a male and female parent is likely to vary both within the population and within the flowering season. Key words: pollen to ovule ratio, Raphanus, pollen number, temporal changes, phenotypic gender, Brassicaceae, radish.

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REGULAR ARTICLES / ARTICLES RÉGULIERS Whether to reproduce or not: immune suppression and costs of parasites during reproduction in the Arctic charr

Canadian Journal of Zoology ◽

10.1139/z00-193 ◽

2001 ◽

Vol 79 (2) ◽

pp. 271-278 ◽

Cited By ~ 48

Author(s):

Frode Skarstein ◽

Ivar Folstad ◽

Ståle Liljedal

Keyword(s):

Immune Suppression ◽

Salvelinus Alpinus ◽

Arctic Charr ◽

Indirect Evidence ◽

The Arctic ◽

Parasitic Infections ◽

Intermediate Hosts ◽

Parasite Infections ◽

Gamete Production ◽

The Difference

Secondary sexual characters are assumed to be costly to develop, and the costs of parasite infections and immune suppression are currently an active area of research within sexual selection. We investigated differences in parasitic infections and immunological activity between reproductively active and inactive Arctic charr (Salvelinus alpinus). Spawning fish were found to have higher intensities of macroparasite infections than nonspawning or resting fish. The difference in intensity between spawning and resting fish was only observed in males, and can be explained by differences in exposure or susceptibility to parasites. However, there is indirect evidence that the difference in parasite intensities does not stem from varying exposure originating from group differences in consumption of carotenoid-containing intermediate hosts. We show, rather, that spawning males may be more susceptible, since they have a smaller spleen, which is an important lymphocyte-producing organ, than resting males. As these costs of spawning are found predominantly among males, they are unlikely to be the result of energetic investment in gamete production, as gamete production in general is thought to be more energetically demanding in females than in males. Rather, we suggest that the observed costs of reproduction result from immune suppression related to ornamental development and spermatogenesis.

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Hypoxia and sulphide influence gamete production in Ulva sp.

Aquatic Botany ◽

10.1016/j.aquabot.2005.08.007 ◽

2006 ◽

Vol 84 (2) ◽

pp. 144-150 ◽

Cited By ~ 6

Author(s):

Maria Grazia Corradi ◽

Gessica Gorbi ◽

Corrado Zanni

Keyword(s):

Gamete Production

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Growth and Reproductive Energetics of three Scallop Species from British Columbia (Chlamys hastata, Chlamys rubida, and Crassadoma gigantea)

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f91-029 ◽

1991 ◽

Vol 48 (2) ◽

pp. 215-221 ◽

Cited By ~ 12

Author(s):

B. A. MacDonald ◽

R. J. Thompson ◽

N. F. Bourne

Keyword(s):

British Columbia ◽

Reproductive Output ◽

Reproductive Effort ◽

Shell Height ◽

Somatic Growth ◽

Somatic Tissue ◽

Tissue Growth ◽

Net Production ◽

Available Energy ◽

Gamete Production

Three scallop species from British Columbia display different strategies for partitioning available energy between somatic tissue growth and gamete production as they increase in age. The spiny scallop Chlamys hastata and the pink scallop Chlamys rubida only live about 6 yr and rarely exceed 80 mm in shell height whereas the rock scallop Crassadoma gigantea may reach 170 mm in height and live for 20 yr or more. Growth, reproductive output, and reproductive effort at any given age are higher in Chlamys hastata than in the smaller Chlamys rubida. Somatic growth in Crassadoma gigantea ceases completely in the final years, but in the short-lived species Chlamys hastata and Chlamys rubida, individuals continue to grow until they die. In long-lived pectinids the emphasis often shifts from somatic growth to gamete production before the midpoint of the life cycle, and our observations on Crassadoma gigantea are consistent with this trend. Short-lived species, however, invest relatively less in reproduction; in our study, reproductive output in Chlamys rubida did not exceed 40% of nonrespired assimilation (net production), and reproductive effort in Chlamys hastata did not reach 50% until the final year of life.

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