Table 1.

Density (mean ± SD) of genomic features in the recombining (PAR) and nonrecombining region of the ostrich Z chromosome

Element	PAR	Nonrecombining region	Wilcoxon Signed-ranked P value
Gene density	0.241 ± 0.134	0.20 ± 0.135	0.16
Repeat density	0.054 ± 0.031	0.071 ± 0.042	7.14 × 10−15
GC density	0.399 ± 0.037	0.395 ± 0.03	0.62