基于ASP的种畜BLUP育种值的程序设计     

范强  田长永  俞美子 《安徽农业科学》2011,(8):4705-4707

为提高家畜选育效果,采用ASP语言编程,从Excel文件中读取数据,实现种畜BLUP育种值的计算功能。  相似文献   

基于射频识别的绒山羊育种生产管理系统研究     

吴铁成  勿都巴拉  何云梅  李玉荣  赵存发  马跃军  刘斌  赵生国 《中国畜牧兽医》2016,43(3):776-783

为满足中国绒山羊业发展需求,提高种羊选种选配的准确性和科学性、提升生产效率,运用信息技术和现代育种理论可对绒山羊进行科学化育种及精准化管理。本研究采用MVC软件设计模式、B/S三层网络结构、BLUP法育种及绒山羊增绒等技术,开发基于射频识别(RFID)的绒山羊育种生产管理系统,该系统主要包含信息管理、育种分析、生产管理、营养调控和效益分析等功能模块。系统运用WOMBAT遗传评估软件计算育种值和近交系数从而确定最优父母组合,通过联合育种加快绒山羊经济性状的遗传改良进展及相配套的生产技术,实现不同育种目标的生产。通过育种目标的设定及基于绒山羊个体信息,系统可自动生成种羊分级评定建议、配种建议、淘汰建议、分群整群建议、物料预警、日粮配方和对一些生产时间节点(如预产期、光控增绒放牧时长、防疫、补饲等)的提醒,为"1396"型绒山羊的育种及高效饲养提供技术支持,从而实现绒山羊育种和生产的信息化、规范化和科学化。  相似文献   

Combining ability among apomictic and sexual parents of Urochloa humidicola     

Ulisses Jos de Figueiredo  Sanzio Carvalho Lima Barrios  Cacilda Borges do Valle  Jos Airton Rodrigues Nunes 《Grass and Forage Science》2019,74(4):678-686

The diallel cross constitutes an informative genetic design for choosing genitors and crosses in breeding programmes since it provides estimates of general (GCA) and specific (SCA) combining abilities. Because the breeding programme for Urochloa humidicola ([Rendle] Morrone & Zuloaga; syn. Brachiaria humidicola [Rendle] Schweick) at Embrapa Beef Cattle is recent, these estimates are still unknown. Thus, the aim of this study was to obtain the estimates of GCA and SCA from the partial diallel cross design between sexual and apomictic parents. The crosses involved nine sexual and ten apomictic parents. Seventy‐one full‐sib progenies were obtained and evaluated in an incomplete block design, using all parents and the cv. BRS Tupi as a check. The agronomic and forage quality traits were evaluated using seven harvests. Statistical analysis was performed using the mixed model approach. Significant variations were associated with GCA among sexual parents for biomass yield and forage quality traits. However, this cannot be observed for apomictic parents for GCA. The SCA effect was not significant for the assessed traits. These results showed the predominance of additive effects. Sexual parents SEX3 and SEX4 presented the highest potential for contributing favourable alleles in hybrid combinations. The absence of GCA among apomictic parents and SCA suggests the need to increase genetic variability for the generation of breeding populations of U. humidicola.  相似文献   

经纬杂交试验分析新法──最优线性无偏预测     

潘玉春 《东北农业大学学报》1994,25(2):126-131

对于经纬杂交试验，首次引入了最优线性无偏预测原理。提出了一种新的分析方法，并就数学模型、统计假定、方差组分估计及具体求算各个步骤进行了深入细致的研究．这种方法假定各参数为随机效应，不受重复数等与不等的影响，且可以剔除环境效应，并利用多环境下的资料，因而可以提高预测值的准确性并使其具有更广泛的适用性．  相似文献   

Genetic parameters and evaluation of the Tunisian dairy cattle population for milk yield by Bayesian and BLUP analyses   总被引：1，自引：0，他引：1  

A. Ben Gara  B. Rekik  M. Bouallgue 《Livestock Science》2006,100(2-3):142-149

A Markov Chain Monte Carlo Bayesian method and BLUP analyses were used on Tunisian dairy cattle data. Data included 92,106 lactation records collected on 37,536 animals over 19 freshening years, from 1983 to 2001. Each record was partitioned into the fixed effects of herd-year, month of calving, and age-parity, a permanent environmental effect, an additive genetic effect, and a residual effect.

Posterior conditional distributions were determined for variance components and model effects. Solutions (BLUE) and posterior means for levels of herd-year, month of calving, and age-parity showed similar patterns. Posterior means of heritability and repeatability were 0.17 ± 18 × 10^− 5 and 0.39 ± 8 × 10^− 5, respectively. Posterior means of bull's breeding values were compared to bull's BLUP solutions. BLUP solutions were obtained using 0.17 and 0.39, estimated from the data, and 0.25 and 0.40 estimates for heritability and repeatability, respectively. Rank correlations between bull's posterior means and BLUP breeding values were 0.998 and 0.994 using genetic parameters estimated from the data and from the literature, respectively. This correlation coefficient was 0.995 between bull's BLUP solutions using either of the two sets of genetic parameters.  相似文献   

多性状BLUP法估计乳用种公牛育种值及预测精确度分析   总被引：2，自引：0，他引：2  

周明坤 《中国农业科学》1991,24(4):75-80

最优线性无偏预测（BLUP）法是近代选择乳用种公牛的一种最佳方法,并具有广泛的适用性。本文是在多性状BLUP法基础上,吸收总性能指数（TPI）法的优点,提出公牛多性状传递力指数（TTI）计算公式,应用于种公牛的选择。这种多性状选择方法,我们称为总传递力指数法（简称TTI法）。对BLUP法预测精确度的计算也作了具体说明,并以江西省畜牧良种场13头公牛的579头女儿牛的第一胎产奶资料,其中540头女儿牛有一胎平均乳脂率,464头有一胎时外貌评分记录,应用TTI法对这些公牛的三个性状进行综合评定及其预测精确度分析。TTI法可把经济性状和非经济性状结合在一起,综合评定乳用种公牛,克服了目前局限于单性状的缺陷。本试验结果表明,TTI法在生产上具有较大实用价值,可以在奶牛改良中推广。  相似文献   

应用BLUP法进行长白猪主选性状的遗传趋势分析   总被引：3，自引：0，他引：3  

陈斌  彭新社 《湖南农业大学学报(自然科学版)》1998,24(3):241-244

应用多性状ＢＬＵＰ法对长白猪选育中的主选性状日增重和背膘厚进行了遗传趋势的分析。研究结果表明,３个世代的群体平均育种值,日增重分别为３０．１８,４１．８８和９５．２４ｇ,表现出逐代上升的趋势;背膘厚分别为０．１４,０．０２和－０．２８ｍｍ,呈逐代下降趋势,说明所采取的育种措施是有效的。  相似文献   

Spatial prediction of forest stand variables   总被引：1，自引：1，他引：0  

Arne Nothdurft  Joachim Saborowski  Johannes Breidenbach 《European Journal of Forest Research》2009,128(3):241-251

This study aims at the development of a model to predict forest stand variables in management units (stands) from sample plot inventory data. For this purpose we apply a non-parametric most similar neighbour (MSN) approach. The study area is the municipal forest of Waldkirch, 13 km north-east of Freiburg, Germany, which comprises 328 forest stands and 834 sample plots. Low-resolution laser scanning data, classification variables as well rough estimations from the forest management planning serve as auxiliary variables. In order to avoid common problems of k-NN-approaches caused by asymmetry at the boundaries of the regression spaces and distorted distributions, forest stands are tessellated into subunits with an area approximately equivalent to an inventory sample plot. For each subunit only the one nearest neighbour is consulted. Predictions for target variables in stands are obtained by averaging the predictions for all subunits. After formulating a random parameter model with variance components, we calibrate the prior predictions by means of sample plot data within the forest stands via BLUPs (best linear unbiased predictors). Based on bootstrap simulations, prediction errors for most management units finally prove to be smaller than the design-based sampling error of the mean. The calibration approach shows superiority compared with pure non-parametric MSN predictions.  相似文献   

民猪产仔数性状四个候选基因效应分析   总被引：16，自引：0，他引：16  

李婧  杨润清  孟和  潘玉春 《上海交通大学学报(农业科学版)》2004,22(1):74-77

为了更全面地探讨民猪高繁殖力的遗传基础,以期为民猪的分子标记保种提供依据,选择ESR、FSHβ、PRLR和EGF等四个基因作为民猪产仔数的候选基因,采用PCR-SSCP法进行了各基因多态性检测,利用系谱、标记信息与表型值记录,建立线性混合模型,对各基因位点对民猪产仔数的影响进行了BLUP分析。结果表明:①四个基因位点在民猪保种群体中均存在多态性,但与Hardy-Weinberg平衡状态下的基因型频率相比较发现,只有ESR基因的基因型分布差异不显著(P>0.05),说明四个基因的基因型频率在民猪保种群中大多处于不稳定状态。②在忽略基因位点间互作的条件下,各基因位点均与民猪产仔数无显著相关(P>0.05),即各基因位点的效应均不显著。  相似文献   

应用动物模型对罗氏沼虾育种估计的差别分析     

罗坤  孔杰  栾生  杨国梁  王军毅  张宇飞 《海洋水产研究》2008,29(3)

为准确评估罗氏沼虾的育种值,利用罗氏沼虾106个家系中2628尾个体的体重资料,分别考虑日龄、性别和雌虾出池时是否抱卵等因素,设计了4种单性状动物模型,应用BLUP法估计个体的体重育种值。4种模型所估计的体重遗传力差别较大,遗传力范围在0.02～0.13之间。分析表明,家系混养前日龄与家系出池体重测定值存在极显著的相关(r=0.434,P<0.01),说明家系混养前日龄对混养后家系个体的体重有显著影响,提示在动物模型设计时,应该考虑家系混养前日龄作协变量;在考虑性别效应、雌虾出池时的抱卵效应,并以家系混养前日龄为协变量,获得的育种值估计较其他模型更为准确。实验还对育种值选择与表型值选择的效率进行了比较。结果表明,依据育种值选择与依据表型值选择的结果存在着较大差异,两种选择方法选取的前53个家系育种值的平均值分别为0.70和0.58g,前者比后者提高20.7%,提示依据育种值的选择效率要高于表型值选择效率。  相似文献