Masahiro Satoh
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View article: Development of prediction equations for immunoglobulin A, immunoglobulin G, and immunoglobulin M concentrations in mature milk from Holstein cows using milk infrared spectral data
Development of prediction equations for immunoglobulin A, immunoglobulin G, and immunoglobulin M concentrations in mature milk from Holstein cows using milk infrared spectral data Open
Immunoglobulins in ruminant mammary secretions play a central role in active immune protection of the mammary gland against infections. Ig are present in both colostrum and milk from cows, and interest in routinely quantifying the Ig conte…
View article: Ambulatory blood pressure monitoring, European guideline targets, and cardiovascular outcomes: an individual patient data meta-analysis
Ambulatory blood pressure monitoring, European guideline targets, and cardiovascular outcomes: an individual patient data meta-analysis Open
Background and Aims Hypertension is the predominant modifiable cardiovascular risk factor. This cohort study assessed the association of risk with the percentage of time that the ambulatory blood pressure (ABP) is within the target range (…
View article: Weighted Values for Direct and Maternal Genetic Effects to Maximize the Accuracy of Index Selection
Weighted Values for Direct and Maternal Genetic Effects to Maximize the Accuracy of Index Selection Open
A method was devised to obtain weighted values for the additive direct and maternal genetic effects of a single trait, estimated using a selection index to maximize the accuracy of selection. A method maximizing the square of the selection…
View article: Relationships Between Genetic Parameters in the Component Traits of a Ratio Trait and the Distribution and Heritability of Such Ratio Trait
Relationships Between Genetic Parameters in the Component Traits of a Ratio Trait and the Distribution and Heritability of Such Ratio Trait Open
The relationships between the distribution and heritability of a ratio trait and the genetic parameters of its component traits were clarified using a Monte Carlo computer simulation. The component traits of a ratio trait were assumed to b…
View article: Methods of Calculating Prediction Error Variance and Prediction Accuracy for Restricted Best Linear Unbiased Prediction of Breeding Values
Methods of Calculating Prediction Error Variance and Prediction Accuracy for Restricted Best Linear Unbiased Prediction of Breeding Values Open
Prediction error variance (PEV) and prediction accuracy (PA) of breeding values (BVs) are essential for formulating breeding plans and predicting response to selection. However, restricted best linear unbiased prediction method (RBLUP meth…
View article: Estimation of genetic parameters for bull conception rate and its genetic correlations with semen production traits in Japanese Black bulls
Estimation of genetic parameters for bull conception rate and its genetic correlations with semen production traits in Japanese Black bulls Open
The P of achieving pregnancy is an important trait of bull fertility in beef cattle and is defined as the bull conception rate (BCR). This study aimed to clarify and better understand the genetic architecture of the BCR calculated using ar…
View article: Characteristics of restricted selection indices and geometrical interpretation of restricted breeding values
Characteristics of restricted selection indices and geometrical interpretation of restricted breeding values Open
Restricted selection is used to control genetic changes in one or more characters. Three main selection indices are adopted for this purpose. First, Kempthorne's index is used to maximize aggregate breeding value (BV) with changes in some …
View article: Reaction‐norm animal model analysis of average daily gain heat tolerance in purebred Duroc pigs
Reaction‐norm animal model analysis of average daily gain heat tolerance in purebred Duroc pigs Open
The present study aimed to genetically improve growth performance under high‐heat environments by specifically designing a reaction‐norm animal model (RNAM) for purebred Duroc pigs in Japan. A total of 54,750 records of average daily gain …
View article: Genetic characteristics of the coronet scores related to Holstein cattle hoof health in Japan
Genetic characteristics of the coronet scores related to Holstein cattle hoof health in Japan Open
Hoof disorders are crucial factors leading to dairy cattle culling. These disorders are difficult to detect, diagnose, and record, causing animal health problems and serious economic losses. The coronet score is a new hoof health indicator…
View article: Prediction of response to truncated selection based on BLUP of breeding values and its prediction accuracy
Prediction of response to truncated selection based on BLUP of breeding values and its prediction accuracy Open
Three methods of predicting the response to truncated selection based on BLUP of breeding values (BVs) were compared under conditions in which the phenotypic values for the progenies of selected animals were not available. The following me…
View article: A method of calculating weighted values of objective traits for BLUP of breeding values to achieve relative desired changes
A method of calculating weighted values of objective traits for BLUP of breeding values to achieve relative desired changes Open
A method of calculating weighted values for objective traits from the phenotypic records of all animals in a population was devised as an alternative to the conventional method of calculating weighted values from a family selection index. …
View article: Estimation of off-farm temperatures from meteorological observation records and their level of accuracy
Estimation of off-farm temperatures from meteorological observation records and their level of accuracy Open
複数の気象観測所における気温データから豚舎外気温を推定するための適切な方法を考案することを目的とした.選定した9地点の気象庁気象観測所における気温データ(日平均気温,日最高気温,日最低気温)をマスクし,その周辺の近隣1~8観測所における気温データを用いて,逆距離加重法によってマスクした気温データを推定した.また,日最高気温と日最低気温から日較差を推定した.その結果,日平均気温および日最高気温は,近隣の3つの観測所から推定することで精度の高い推定値を得られることが明らかとなっ…
View article: Searching threshold temperature for farrowing performance traits of pigs in Japan using public meteorological data
Searching threshold temperature for farrowing performance traits of pigs in Japan using public meteorological data Open
暑熱負荷の頑健なモデリングを目指し,2007年から2022年の間に得られたブタランドレース種10,320頭の分娩成績52,668件を対象に,気象庁気温データを用いたプラトー線形折れ線回帰分析を行い,分割点である閾値気温を探索した.対象形質は,分娩時の一腹総産子数(TNB),生存産子数(NBA),死産子豚数(NSB),総産子体重(LWB),平均産子体重(MWB)および産子生存率(SVB)である.TNB,NBA,LWBは種付日,NSB,MWBおよびSVBは分娩日最高気温を用いた…
View article: Genome‐wide detection of changes in allelic frequency in Landrace pigs selected for resistance to mycoplasma pneumonia of swine
Genome‐wide detection of changes in allelic frequency in Landrace pigs selected for resistance to mycoplasma pneumonia of swine Open
Closed‐pig line breeding could change the genetic structure at a genome‐wide scale because of the selection in a pig breeding population. We investigated the changes in population structure among generations at a genome‐wide scale and the …
View article: Estimation of off‐farm temperatures and temperature‐humidity index from meteorological observation records
Estimation of off‐farm temperatures and temperature‐humidity index from meteorological observation records Open
The objective of this study was to devise an optimal method for estimating air temperatures outside pig farms to be able to evaluate the genetic performance of pigs. Using daily temperature data from Japan Meteorological Agency meteorologi…
View article: Genomic dissection of repeatability considering additive and nonadditive genetic effects for semen production traits in beef and dairy bulls
Genomic dissection of repeatability considering additive and nonadditive genetic effects for semen production traits in beef and dairy bulls Open
The low heritability and moderate repeatability of semen production traits in beef and dairy bulls suggest that nonadditive genetic effects, such as dominance and epistatic effects, play an important role in semen production and should the…
View article: Genetic relationship of female reproductive traits with calf weight and carcass traits in Japanese Black cattle population in Miyagi prefecture
Genetic relationship of female reproductive traits with calf weight and carcass traits in Japanese Black cattle population in Miyagi prefecture Open
宮城県黒毛和種集団の雌性繁殖形質,子牛市場出荷時体重および枝肉形質に関する遺伝的パラメーターを推定した.雌性繁殖形質として初産月齢45,334件,妊娠期間283,621件,空胎期間238,287件,分娩間隔238,287件の記録を用いた.これら分娩による産子240,160頭分の子牛市場出荷時体重の記録を用いた.さらにこのうち122,910頭分の枝肉重量,ロース芯面積,バラの厚さ,皮下脂肪の厚さ,歩留基準値およびBMSナンバーの記録を用いた.遺伝率の推定には単形質アニマルモデ…
View article: Heritability and genetic correlation estimates of semen production traits with litter traits and pork production traits in purebred Duroc pigs
Heritability and genetic correlation estimates of semen production traits with litter traits and pork production traits in purebred Duroc pigs Open
We estimated heritabilities of semen production traits and their genetic correlations with litter traits and pork production traits in purebred Duroc pigs. Semen production traits were semen volume, sperm concentration, proportion of morph…
View article: Genetic Contributions of Genes on Sex Chromosomes and Mitochondrial DNA in a Pedigreed Population
Genetic Contributions of Genes on Sex Chromosomes and Mitochondrial DNA in a Pedigreed Population Open
The genetic contribution with respect to autosomal genes has been widely used to evaluate the genetic diversity of a target population. Here, we developed a method to calculate the genetic contribution with respect to genes on sex chromoso…
View article: An attempt of using public ambient temperature data in swine genetic evaluation for litter size traits at birth in Japan
An attempt of using public ambient temperature data in swine genetic evaluation for litter size traits at birth in Japan Open
To obtain the fundamental information on using ambient temperature information in developing the model for routine swine genetic evaluation in Japan, we analyzed total number born (TNB), number born alive (NBA), and number stillborn (NSB) …
View article: Genetic relationship between superovulatory response traits and carcass traits in Japanese Black cattle
Genetic relationship between superovulatory response traits and carcass traits in Japanese Black cattle Open
We estimated the genetic correlations between superovulatory response traits and carcass traits in Japanese Black cattle. As regards the superovulatory response traits in cows, we analyzed the phenotypic records of the total number of embr…
View article: Effect of ambient temperature on average daily gain of pigs evaluated using public weather data and a plateau‐linear regression model
Effect of ambient temperature on average daily gain of pigs evaluated using public weather data and a plateau‐linear regression model Open
We performed a plateau‐linear regression model analysis of the average daily gain (ADG) of pigs on daily average temperature at the end of performance testing ( T ). Records for performance testing between 30 kg and 105 kg of 2268 purebred…
View article: Estimation of genetic parameter for feed efficiency and resilience traits in three pig breeds
Estimation of genetic parameter for feed efficiency and resilience traits in three pig breeds Open
Recently, automatic feeders have become popular for collecting daily feed intake data in the pig industry, making it possible to evaluate genetic effects on feed efficiency and resilience traits, expressed as day-to-day fluctuations in fee…
View article: Deriving Economic Values for Female Reproductive Traits in Lifetime Carcass Production of Japanese Black Cows Using Deterministic Profit Function
Deriving Economic Values for Female Reproductive Traits in Lifetime Carcass Production of Japanese Black Cows Using Deterministic Profit Function Open
Improving reproductive efficiency is required to strengthen the production base of high-quality Wagyu beef in Japan. We developed a deterministic profit function (P) for lifetime carcass production of Japanese Black cows to calculate econo…
View article: Estimation of genetic parameters for superovulatory response traits in Japanese Black cows
Estimation of genetic parameters for superovulatory response traits in Japanese Black cows Open
The aim of this study was to estimate genetic parameters for superovulatory response traits in order to explore the possibility of genetic improvement in Japanese Black cows. We analyzed 19 155 records of the total number of embryos and oo…
View article: Comparison of selection responses based on feed conversion ratio and its component traits in pigs
Comparison of selection responses based on feed conversion ratio and its component traits in pigs Open
選抜における比の形質の影響を検討するため，比の形質を選抜形質に含めた場合と含めない場合における経済的な利益を比較した．ブタにおける飼料要求率を構成する増体重および飼料摂取量についてモンテ・カルロ法によるコンピュータシミュレーションにより，第0世代から第3世代までの6,550頭分の継代記録を発生させ，増体重，飼料摂取量および飼料要求率における遺伝的パラメーターを推定した．次に，基礎集団の記録（雌雄各10,000頭）を発生させ，飼料要求率の直接選抜，増体重と飼料摂取量の相対希望…