Crossbreeding of S×P and P×S, S×F, and F×S resulted in highly significant effects of heterosis on egg number (9.3% and 8.5% respectively), total weight of eggs laid (11.7% and 12.8% respectively), and on the feed consumption to total egg weight ratio (‒8.0% and ‒7% respectively).
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Selection and crossbreeding in relation to plumage color inheritance in three chinese egg type duck breeds (anas platyrhynchos).
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