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. 2020 Jul 8;37(12):3423–3438. doi: 10.1093/molbev/msaa167

Fig. 6.

Fig. 6.

Correlation between fertility phenotypes in hybrid males. Testes weight and sperm count are positively correlated in both types of hybrid males in interspecific (Pearson’s r = 0.95, P < 0.0001 for domesticus and musculus), musculus “humanized” interspecific hybrids (r = 0.83, P < 0.0001), and intraspecific domesticus and musculus hybrids (r = 0.78 and 0.66, P < 0.0001 for domesticus and musculus). The F1 hybrids with testes weight <80 mg are fully sterile, producing virtually no sperm. Dashed lines denote 95% CI profile likelihood.