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The number of 500-kb windows containing an associated SNP with a P-value < 10−4 that overlapped across traits within each breed. Each window had to contain a SNP with an unadjusted P-value < 10−4. (A) Angus, (B) Charolais, (C) Holstein-Friesian, and (D) Limousin. Pink represents direct calving difficulty (DCD), green represents maternal calving difficulty (MCD), and blue represents PM.
