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首页> 外文期刊>Indian Journal of Poultry Science >Inheritance of body weight, shank length and production traits in PD1 (Vanaraja male line)
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Inheritance of body weight, shank length and production traits in PD1 (Vanaraja male line)

机译：PD1（Vanaraja雄性系）的体重，小腿长度和生产性状的遗传

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Body weight, shank length and different production parameters were recorded at different ages in a selected flock of PD1 (Vanaraja male line). The body weight, egg weight, and shank length increased with age. Egg production upto 72 weeks of age was 142.27 eggs and the age at sexual maturity was 173.26 days. Egg production per bird at 4 weeks of interval from 21 to 72 weeks of age varied from 1.94 to 14.35 eggs and the peak egg production was recorded during 29 to 32 weeks of age. The heritability estimates for body weight at 6 weeks and weight at sexual maturity were low in magnitude, however, the estimate was moderate to high for the body weight at 32, 40, 64 and 72 weeks of age. Sire component estimates were higher than the dam component estimatesfor body weights. Shank length at 6 weeks of age showed low estimates at early ages and as the age of measurement increases the heritability estimates increased. Dam component estimates were higher than the sire component estimates. Heritability of ageat sexual maturity was moderate in magnitude. Estimates of heritability for egg production were low to moderate in magnitude with dam component estimates being higher. Egg weight showed moderate to high heritability estimates and sire component was higher indicating the presence of additive genetic effect. Genetic and phenotypic correlations for different important traits were calculated. Shank length with egg production to 40 weeks of age and egg weights were positively correlated, whereas, body weightwith egg production to 40 weeks of age was negatively correlated. Egg weight and age at sexual maturity showed negative correlation with egg production. The results indicated that for improving the desired traits appropriate breeding and selection methods need to be followed based on heritability estimates and correlation.
机译：在选定的PD1群（Vanaraja雄性系）的不同年龄中记录了体重，小腿长度和不同的生产参数。体重，卵重和小腿长度随年龄增长而增加。直至72周龄的产卵量为142.27个卵，性成熟时的卵龄为173.26天。在21至72周龄的4周间隔内，每只禽的卵产量从1.94至14.35卵不等，并且在29至32周龄期间记录了最高卵产量。 6周体重和性成熟时体重的遗传力估计值偏低，但是，对于32、40、64和72周龄时，体重的估计值是中到高。父亲的体重估计高于大坝的体重估计。 6周龄时的小腿长度在早期显示出较低的估计值，并且随着测量年龄的增加，遗传力估计值也增加。大坝组成部分的估计高于父项组成部分的估计。年龄性成熟的遗传力中等。产蛋遗传力的估计值范围从低到中，大坝成分的估计值较高。卵重显示出中等至高的遗传力估计值，而父系成分较高，表明存在附加遗传效应。计算了不同重要性状的遗传和表型相关性。小腿长度与产蛋至40周龄和蛋重呈正相关，而体重与产蛋至40周龄呈负相关。性成熟时的蛋重和年龄与产蛋量呈负相关。结果表明，为改善所需性状，需要根据遗传力估计和相关性遵循适当的育种和选择方法。

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