AKP作为遗传标记培育高产蛋鸡的研究

STUDIES ON AKP AS GENETIC MARKER FOR SELECTION OF INCREASING EGG PRODUCTION IN CHICKEN

本研究以北京白鸡Ⅲ系7世代选择群及其原始群为材料,比较两品系及不同碱性磷酸酶(AKP)同功酶型间各性状差异,估计AKP活力与各性状相关,探讨AKP活力作为遗传标记的可行性。结果表明,选择产蛋量对AKP同功酶型等位基因频率有显著影响,选择使AKP活力提高,快带型个体数增多。快带型个体的产蛋能力显著高于慢带型个体。AKP同功酶型间蛋黄胆固醇含量存在显著差异。结果指出,6周龄AKP活力可以作为选择产蛋量遗传标记。应用该结果对2代以上闭锁群繁育的尼克鸡进行选育,建立高、低AKP活力系的结果表明,两系在产蛋量等性状上存在显著差异,选择高、低AKP活力个体在很大程度上选择了F、S型个体。

Offspings ( from 20 sires ) of selected population of Beijing White Lenghon Strain Ⅲ and its base population were included in this experiment. The differences of traits were compared in two strains and serum alkaline phosphatase ( AKP ) isozyme types, and correlations between traits were estimated. The result showed that selection on egg production have significant effect on AKP isozyme type allele gene frequency and AKP activity. The frequency of AKP was significantly higher in the selected population than that in the base population. Selection on egg production made AKP activity increased. Egg production of F type chicken was significantly higher than that of S type. Yolk cholesterol content have significant difference in AKP isozyme types. It suggested that AKP activity at 6 weeks be closly genetic correlated with egg production, and it have high heritability,it could be used as genetic marker of egg production. With this conclusion, the results of selecting Nico chicken showed that there were great difference between high and low AKP activity strains. Selection on high AKP Activity Chicken, in the great extent, picked out F type.