不同纬度鳉鱼体型-繁殖力关系的演变

IF 4.5 1区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Molecular Ecology Pub Date : 2024-11-05 DOI:10.1111/mec.17578
Shingo Fujimoto, Bayu K A Sumarto, Iki Murase, Daniel F Mokodongan, Taijun Myosho, Mitsuharu Yagi, Satoshi Ansai, Jun Kitano, Satoshi Takeda, Kazunori Yamahira
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引用次数: 0

摘要

在大多数鱼类中,后代数量随母体大小的增加而增加。虽然这种体型与繁殖力的关系在不同物种之间经常会因生命史特征的共同进化而变化,但这种体型与繁殖力关系的遗传基础仍不清楚。我们在两个小型青鳉物种(Oryzias latipes和O. sakaizumii)中探索了这种体型-繁殖力关系的遗传基础。我们的研究结果表明,O. sakaizumii的繁殖力高于O. latipes,利用种间F2杂交种进行的定量性状位点分析表明,23号染色体与体型-繁殖力关系有关。特别是该区域的基因 igf1 和 lep-b 与生命史性状有关,包括不同类群的体细胞生长、性腺成熟和后代数量。由于O. sakaizumii分布在较高纬度地区,其野生产卵期比O. latipes短,因此我们认为在O. sakaizumii中观察到的相对较高的繁殖力是对高纬度地区的一种适应。我们还讨论了与该物种繁殖力提高的进化相关的潜在生态影响。
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Evolution of Size-Fecundity Relationship in Medaka Fish From Different Latitudes.

In most fishes, the number of offspring increases with maternal body size. Although this size-fecundity relationship often varies among species as a result of the coevolution of life-history traits, the genetic basis of such size-fecundity relationships remains unclear. We explored the genetic basis underlying this size-fecundity relationship in two small medaka species, Oryzias latipes and O. sakaizumii. Our findings showed that O. sakaizumii has a higher fecundity than O. latipes, and quantitative trait locus analysis using interspecific F2 hybrids showed that chromosome 23 is linked to the size-fecundity relationship. In particular, the genes igf1 and lep-b in this region are known to be associated with life-history traits, including somatic growth, gonad maturation, and progeny numbers in various taxa. Because O. sakaizumii is distributed at higher latitudes and has a shorter spawning season than O. latipes in the wild, we propose that the relatively high fecundity observed in O. sakaizumii is an adaptation to high latitudes. We also discuss the potential ecological ramifications associated with the evolution of increased fecundity in this species.

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来源期刊
Molecular Ecology
Molecular Ecology 生物-进化生物学
CiteScore
8.40
自引率
10.20%
发文量
472
审稿时长
1 months
期刊介绍: Molecular Ecology publishes papers that utilize molecular genetic techniques to address consequential questions in ecology, evolution, behaviour and conservation. Studies may employ neutral markers for inference about ecological and evolutionary processes or examine ecologically important genes and their products directly. We discourage papers that are primarily descriptive and are relevant only to the taxon being studied. Papers reporting on molecular marker development, molecular diagnostics, barcoding, or DNA taxonomy, or technical methods should be re-directed to our sister journal, Molecular Ecology Resources. Likewise, papers with a strongly applied focus should be submitted to Evolutionary Applications. Research areas of interest to Molecular Ecology include: * population structure and phylogeography * reproductive strategies * relatedness and kin selection * sex allocation * population genetic theory * analytical methods development * conservation genetics * speciation genetics * microbial biodiversity * evolutionary dynamics of QTLs * ecological interactions * molecular adaptation and environmental genomics * impact of genetically modified organisms
期刊最新文献
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