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4 results for “full-factorial breeding”
Data from: Full-factorial breeding experiment with lake char (lake Geneva, winter 2018/2019)
<p><span>The 'good genes' hypotheses of sexual selection predict that females prefer males with strong ornaments because they are in good health and vigor and can afford the costs of the ornaments. A key assumption of this concept is that male health and vigor are useful predictors of genetic quality and hence offspring performance. We tested this prediction in wild-caught lake char (<em>Salvelinus umbla</em>) whose breeding coloration is known to reveal aspects of male health. We first reanalyzed results from sperm competition trials in which embryos of known parenthood had been raised singly in either a stress- or non-stress environment. Paternal coloration did not correlate with any measures of offspring performance. However, offspring growth was reduced with higher kinship coefficients between the parents. To test the robustness of these first observations, we collected a new sample of wild males and females, used their gametes in a full-factorial <em>in vitro</em> breeding experiment, and singly raised about 3,000 embryos in either a stress- or non-stress environment (stress induced by microbes). Again, paternal coloration did not predict offspring performance, while offspring growth was reduced with higher kinship between the parents. We conclude that, in lake char, the genetic benefits of mate choice would be strongest if females could recognize and avoid genetically related males, while male breeding colors may be more relevant in intra-sexual selection.</span></p>
Full-factorial breeding experiment with lake char (Lake Geneva, winter 2017/2018)
<p>We sampled 16 wild lake char (<em>Salvelinus umbla</em>) and used their gametes to investigate the genetic consequences of different mating scenarios. A full-factorial breeding was used to separate additive genetic from maternal environmental effects, and embryos were raised singly after sublethal exposures to a pathogen, a common pollutant, or water only. In all treatment groups, embryo development was strongly reduced with increased genetic relatedness between the parents. Contrary to predictions of 'good genes' sexual selection, pathogen tolerance of offspring declined with increasing coloration of their fathers.</p> <p>Determination of inbreeding and kinship coefficients: All 10 males and 4 of the 6 females were used in a parallel study that included sperm competition experiments (Nusbaumer et a. 2021). These 14 parents had been prepared in one library for ddRAD sequencing on 2 lanes on an Illumina HIseq 2500 (see de Guttry et al. 2022 for the corresponding 14 gzipped .fastq of these individuals). The remaining 2 females were later genotyped in a different library but again on an Illumina HIseq 2500. After demultiplexing, the 16 individuals were processed together using stacks 2.53, and with the resulting filtered VCF file estimations of kinship and inbreeding have been done. For each individual, the fastq files of the 2 sequencings lanes (2018/2019), or of the replicates within the same library (2021), were merged after demultiplexing using process_radtags (Stacks 2.53). The bash and R scripts are provided. There are no legal or ethical considerations regarding the above-mentioned data.</p>
Full-factorial breeding experiment with lake char (Lake Geneva, winter 2017/2018)
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Data from: Full-factorial breeding experiment with lake char (lake Geneva, winter 2018/2019)
Open the record for dataset details and reuse information.
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