Figure 1.
Heterosis for growth traits at 6 and 18 wk of age. Abbreviations: BL, body length; RIR × WL, offspring of Rhode Island Red sires crossed to White Leghorn dams; WL × RIR, offspring of White Leghorn sires crossed to Rhode Island Red dams.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.