Abstract
LITTLE information is available in the literature concerning the combining ability of inbred lines and the performance of their topcrosses for broilers. Waters (1938) observed that inbred White Leghorn sires topcrossed on White Leghorn females produced offspring that were superior in hatchability and viability to random-bred Leghorns. Growth rates were not reported. The following investigation was conducted in an attempt to learn something of the combining quality and performance of inbred lines for broilers.METHODS AND MATERIALSThe North Carolina Experiment Station has eight inbred lines of chickens, one S. C. White Leghorn, one Rhode Island Red, three Barred Plymouth Rock, and three New Hampshire, which are inbred from 35 to 55 percent. The lines vary according to their type in origin. NC1, S. C. White Leghorn, NC6, Rhode Island Red, NC12, New Hampshire, and NC18, Barred Plymouth Rock, are egg-type lines; NC11, New Hampshire, NC16 and NC17, Barred Plymouth .
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