【摘要】：以動(dòng)物模型結(jié)合平均信息約束最大似然算法(AIREML)分析蛋雞蛋形指數(shù)遺傳力、重復(fù)力和遺傳相關(guān)系數(shù),剖析蛋形指數(shù)遺傳參數(shù)動(dòng)態(tài)變化規(guī)律。試驗(yàn)素材來(lái)自白萊航雞與綠殼蛋雞分離群體,包括親代、F_1代和F_2代,總計(jì)2 326只母雞。每一世代32~60周齡,期間每4周測(cè)量1次蛋品質(zhì),共采集蛋形指數(shù)數(shù)據(jù)19825條。以WOMBAT軟件估計(jì)遺傳方差、永久環(huán)境方差和殘差。結(jié)果表明:品種、世代和周齡,對(duì)蛋形指數(shù)有重要影響,將其列入固定效應(yīng);蛋形指數(shù)性狀并非正態(tài)分布,應(yīng)用平方根反正弦進(jìn)行數(shù)據(jù)轉(zhuǎn)換,但轉(zhuǎn)換前后遺傳參數(shù)估計(jì)值差異不顯著(P0.05);蛋形指數(shù)遺傳力為0.31~0.47,遺傳方差隨周齡增加而增加,至48周齡達(dá)到極大值,之后小幅回落;重復(fù)力為0.47~0.61,永久環(huán)境方差基本穩(wěn)定在同一水平;不同周齡蛋形指數(shù)遺傳相關(guān)系數(shù)為0.91~0.99,永久環(huán)境相關(guān)系數(shù)為0.61~0.92,相鄰周齡遺傳相關(guān)系數(shù)較高。蛋形指數(shù)重復(fù)力較高、周齡之間遺傳相關(guān)系數(shù)接近于1,以個(gè)體選擇可以有效獲取遺傳參數(shù)。
[Abstract]:The egg shape index heritability, repetition power and genetic correlation coefficient of laying hens were analyzed by means of animal model combined with average information constrained maximum likelihood algorithm (AIREML), and the dynamic variation rule of egg shape index genetic parameters was analyzed. The experimental materials were obtained from the separated groups of white-white hens and green-shell laying hens, including parent generation, F _ 2 generation and F _ 2 generation, with a total of 2 326 hens. The egg quality was measured every 4 weeks and 19825 egg shape index data were collected. Genetic variance, permanent environmental variance and residual were estimated by WOMBAT software. The results showed that the variety, generation and week age had an important effect on egg shape index, and it was included in the fixed effect. Egg shape index characters were not normal distribution, square root sine was used for data conversion, but there was no significant difference in genetic parameters before and after the transformation (P0.05). The heritability of egg shape index was 0.31 ~ 0.47, the genetic variance increased with the increase of week age, reached the maximum value at 48 weeks, then decreased slightly, the repetition power was 0.47 ~ 0.61, and the variance of permanent environment was basically stable at the same level. The genetic correlation coefficients of egg shape index and permanent environment were 0.91% and 0.61% respectively at different weeks of age, and the genetic correlation coefficients of adjacent weeks were higher. The reproducibility of egg shape index was higher, and the genetic correlation coefficient between weeks was close to 1. The genetic parameters could be obtained effectively by individual selection.
【作者單位】： 江蘇省家禽科學(xué)研究所;
【基金】：現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系建設(shè)專項(xiàng)資金項(xiàng)目(CARS-41-K02) 江蘇省自然科學(xué)基金項(xiàng)目(BK20131237) 江蘇省農(nóng)業(yè)三新工程項(xiàng)目(SXGC[2015]299) 江蘇省農(nóng)業(yè)科技自主創(chuàng)新資金項(xiàng)目(CX[16]1008) 揚(yáng)州市科技計(jì)劃項(xiàng)目(YZ2014148)
【分類(lèi)號(hào)】：S831.2

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