What specific types of mutations have been observed in salmonid populations under stressful conditions?
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Salmonid populations under stressful conditions exhibit various types of mutations. Studies on Dolly Varden charr in Kamchatka show stress-induced phenotype transformations without a common vector. Research on Escherichia coli and Salmonella highlights stress-induced mutagenesis, increasing beneficial mutations under selective pressures. In aquaculture, bacterial pathogens like Edwardsiella piscicida and Vibrio harveyi develop significant single-nucleotide polymorphisms (SNPs) and mutations in response to stressors. Daphnia pulex exposed to environmental stressors display accelerated rates of deletions and duplications, particularly under metal exposure, impacting mutational load. Stress conditions can enhance mutation rates in salmonid populations, leading to diverse genetic changes such as SNPs, deletions, and duplications, influencing their adaptive responses to environmental challenges.
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4 Citations | Not addressed in the paper. |
| Stress-induced mutagenesis in salmonid populations can lead to beneficial mutations by modulating genetic change, enhancing adaptability under challenging conditions. | |
| Mutations leading to morphological changes like increased pectoral fin rays and altered skull shapes have been observed in salmonid populations under stressful conditions, possibly due to gene drift and founder effects. | |
| The study observed significant single-nucleotide polymorphisms (SNPs) and mutations in genes related to flagella, fimbriae, and membranes in Edwardsiella piscicida and Vibrio harveyi under stressed environments. | |
| Not addressed in the paper. |
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