Saved in:
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Proceedings. Biological sciences
2026
|
| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/41667112/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1868266087568637952 |
|---|---|
| author | Payne, Cheyenne Y Ly, Derek Rodriguez-Soto, Rebecca A Powell, Daniel L Robles, Nemo D Gunn, Theresa R Baczenas, John J Bergman, Abby J Pollock, Alexa Moran, Ben M Baker, Julie C Reznick, David N Schumer, Molly |
| author_facet | Payne, Cheyenne Y Ly, Derek Rodriguez-Soto, Rebecca A Powell, Daniel L Robles, Nemo D Gunn, Theresa R Baczenas, John J Bergman, Abby J Pollock, Alexa Moran, Ben M Baker, Julie C Reznick, David N Schumer, Molly Payne, Cheyenne Y Ly, Derek Rodriguez-Soto, Rebecca A Powell, Daniel L Robles, Nemo D Gunn, Theresa R Baczenas, John J Bergman, Abby J Pollock, Alexa Moran, Ben M Baker, Julie C Reznick, David N Schumer, Molly |
| collection | PubMed - marine biology |
| contents | Recent evolution of large offspring size and post-fertilization nutrient provisioning in swordtails. Payne, Cheyenne Y Ly, Derek Rodriguez-Soto, Rebecca A Powell, Daniel L Robles, Nemo D Gunn, Theresa R Baczenas, John J Bergman, Abby J Pollock, Alexa Moran, Ben M Baker, Julie C Reznick, David N Schumer, Molly Male Female Animals Cyprinodontiformes Life History Traits Viviparity, Nonmammalian Embryonic Development Species Specificity Body Size Animals, Newborn Embryo, Nonmammalian Ovary Gene Expression Regulation Organisms have evolved diverse reproductive strategies that impact the probability that their offspring survive to adulthood. Using morphological measurements in embryos and fry, gene expression analysis and hybrid crosses, we describe divergence in reproductive strategy between two closely related species of swordtail fish (Xiphophorus), which have internal fertilization and give birth to free-swimming fry. We find that one species, Xiphophorus malinche, has evolved larger offspring than its closest relative Xiphophorus birchmanni and dwarfs the offspring size of other species in the genus. The fry of X. malinche are more resilient to starvation than X. birchmanni, hinting that the evolution of large offspring size could be an adaptation to the challenging environments in which X. malinche are born. We also find evidence that X. malinche mothers provision nutrients to their offspring during embryonic development, the first time this process has been documented in the Xiphophorus genus. Moreover, in the ovary, we observe differential regulation of genes associated with maternal nutrient provisioning in other groups that use this reproductive strategy. Finally, we generated hybrid crosses between X. malinche and X. birchmanni to explore the impact of genetics and maternal environment on offspring size, finding that offspring size is at least in part genetically determined. Intriguingly, we find a low rate of survival in one cross direction and investigate the links between reproductive strategy and this asymmetric hybrid incompatibility. |
| format | Artículo científico |
| id | pubmed_41667112 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Proceedings. Biological sciences |
| record_format | pubmed |
| spellingShingle | Recent evolution of large offspring size and post-fertilization nutrient provisioning in swordtails. Payne, Cheyenne Y Ly, Derek Rodriguez-Soto, Rebecca A Powell, Daniel L Robles, Nemo D Gunn, Theresa R Baczenas, John J Bergman, Abby J Pollock, Alexa Moran, Ben M Baker, Julie C Reznick, David N Schumer, Molly Male Female Animals Cyprinodontiformes Life History Traits Viviparity, Nonmammalian Embryonic Development Species Specificity Body Size Animals, Newborn Embryo, Nonmammalian Ovary Gene Expression Regulation Recent evolution of large offspring size and post-fertilization nutrient provisioning in swordtails. Payne, Cheyenne Y Ly, Derek Rodriguez-Soto, Rebecca A Powell, Daniel L Robles, Nemo D Gunn, Theresa R Baczenas, John J Bergman, Abby J Pollock, Alexa Moran, Ben M Baker, Julie C Reznick, David N Schumer, Molly Male Female Animals Cyprinodontiformes Life History Traits Viviparity, Nonmammalian Embryonic Development Species Specificity Body Size Animals, Newborn Embryo, Nonmammalian Ovary Gene Expression Regulation Organisms have evolved diverse reproductive strategies that impact the probability that their offspring survive to adulthood. Using morphological measurements in embryos and fry, gene expression analysis and hybrid crosses, we describe divergence in reproductive strategy between two closely related species of swordtail fish (Xiphophorus), which have internal fertilization and give birth to free-swimming fry. We find that one species, Xiphophorus malinche, has evolved larger offspring than its closest relative Xiphophorus birchmanni and dwarfs the offspring size of other species in the genus. The fry of X. malinche are more resilient to starvation than X. birchmanni, hinting that the evolution of large offspring size could be an adaptation to the challenging environments in which X. malinche are born. We also find evidence that X. malinche mothers provision nutrients to their offspring during embryonic development, the first time this process has been documented in the Xiphophorus genus. Moreover, in the ovary, we observe differential regulation of genes associated with maternal nutrient provisioning in other groups that use this reproductive strategy. Finally, we generated hybrid crosses between X. malinche and X. birchmanni to explore the impact of genetics and maternal environment on offspring size, finding that offspring size is at least in part genetically determined. Intriguingly, we find a low rate of survival in one cross direction and investigate the links between reproductive strategy and this asymmetric hybrid incompatibility. |
| title | Recent evolution of large offspring size and post-fertilization nutrient provisioning in swordtails. |
| topic | Male Female Animals Cyprinodontiformes Life History Traits Viviparity, Nonmammalian Embryonic Development Species Specificity Body Size Animals, Newborn Embryo, Nonmammalian Ovary Gene Expression Regulation |
| url | https://pubmed.ncbi.nlm.nih.gov/41667112/ |