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Genetic parameters of some growth and egg production traits in laying Brown Tsaiya (Anas platyrynchos)



Genetic parameters of some growth and egg production traits in laying Brown Tsaiya (Anas platyrynchos)



Genetics, Selection, Evolution 21(3): 377-384



Five hundred and thirty seven female ducks from the native Brown Tsaiya in Taiwan, derived from 156 dams, 40 sires, 4 locations (sire origin), from five hatches were used in study. Fifteen traits were recorded. Average values of traits measured were the following: adult (30 weeks of age) body weight, 1397 .+-. 120 g; age at first egg, 121 .+-. 11 days; egg numbers up to 245, 280 and 360 days of age, 107 .+-. 13, 139 .+-. 15, 207 .+-. 26, respectively; egg shell strength, 3.8 .+-. 0.5 kg/cm2; egg shell thickness, 0.37 .+-. 0.02 mm; egg weight at 30 and 40 weeks of age, 64.2 .+-. 4.3 g and 67.8 .+-. 4.3 g. Genetic parameters were calculated: heritability estimate from the sire variance component (hs2), dam variance component (hd2). Body weights at 8, 16, 20, 30, 40 weeks of age showed high additive genetic variation (hs2 = 0.36 to 0.61). For egg weight at 30 and 40 weeks of age, hs2 = 0.32 and hs2 = 0.24. For traits related to egg number, hs2 values were low and increased with age, being 0.02, 0.12 and 0.14 respectively for 245, 280 and 360 days of age. But the respective heritabilities calculated from dam variance components were higher, being 0.32, 0.17 and 0.26. The non-additive genetic variation of these traits and perhaps the existence of maternal genetic variance indicate the possibility of conducting within line selection and cross-breeding between lines of the same breed.

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Accession: 001844474

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DOI: 10.1186/1297-9686-21-3-377



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