Fig. 1

Morphological differences in the comb and testis tissues of the Qingyuan partridge roosters at different developmental stages. (A and B) Morphological analysis of the comb (A) and testis (B) tissues of the high-and low-comb groups at different developmental stages using hematoxylin and eosin staining. Original magnification: a-f in Figure A and B: 20x, scale bar = 100 μm and g-l in Figure A and B: 40x, scale bar = 50 μm. In Figure B, ▲ indicates spermatogonium and → indicates sperm cells