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RNA-sequencing Analysis of Hybrid Females Reveals a Dominance of Expression of Alleles From Outcrossing Species Over Those From Selfing Species.

Genome biology and evolution - 30 May 2025

Shao Yanwen, Zhang Yiwen, Ren Xiaoliang, Ho Vincy Wing Sze, Bi Yu, Zhao Zhongying, Li Runsheng

Abstract excerpt

The sister species Caenorhabditis briggsae and Caenorhabditis nigoni are the first Caenorhabditis nematode pair known to produce viable F1 hybrids, making them an ideal model for speciation study. Male F1 hybrids are lethal or sterile depending on the parent of origin, while F1 females, though viable, exhibit distinct phenotypes in fecundity and viability. Besides, both female hybrids could mate with C. nigoni...

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PMID: 40476322
DOI: 10.1093/gbe/evaf098
PMCID: PMC12142003

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