Estimation of heterosis from strain crosses of single comb white leghorns for certain economic traits
1985
Cheong, I.C. | Chung, S.B. (Office of Rural Development, Suwon (Korea R.). Livestock Experiment Station)
This study was carried out to estimate combining abilities and heterosis in Single Comb White Leghorns. The data were obtained over a 500 days period from Apr., 1983 to Sep., 1984 at the Livestock Experiment Station. A total of 1,260 birds were reared, and these birds were composed of 630 pure strains, 378 two-way crosses and 252 four-way crosses. Average amount of heterosis expressed as a ratio was 3.81% for viability, 1.73% for sexual maturity, 2.76% for hen-day egg production, 5.24% for hen-housed egg production, 6.11% for egg weight, -9.41% for feed requirement and 6.30% for body weight at 500 days of egg
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