scholarly journals Prediction of Lambs Growth From Milk Production and Its Composition in Awassi Sheep and Description of Growth Curve of Non-Linear Function

2021 ◽  
Vol 910 (1) ◽  
pp. 012060
Author(s):  
Ahmed Burair Abd-Alameer ◽  
Nasr Noori Al-Anbari
Keyword(s):  
Linear Function ◽  
Milk Production ◽  
Agricultural Research ◽  
Growth Traits ◽  
Growth Curves ◽  
Linear Functions ◽  
Research Station ◽  
Weaning Weight ◽  
Awassi Sheep ◽  
Non Linear

Abstract This study was undertaken at the Ruminant’s Research Station, Office of Agricultural Research/Ministry of Agriculture (20 km west of Baghdad). 102 ewes were used in this study from 1/1/2020- 1/10/2021 to study prediction of lambs growth from milk production and its composition in Awassi sheep and description of growth cure of non–linear function. Simple regression was used to examine relationship between growth traits such as gain, weaning weight, weight at 6 months of age and milk production and its composition. Regression of weaning weight was positive and highly significant (P≤ 0.01) with daily milk yield (DMY) and significant (P≤0.05) with dam’s milk protein percentage (MPP), Analysis of regression also showed significant positive increasing (p≤ 0.05) in lambs' weight at six months of age with increasing of DMY and MPP, where coefficient of regression (CR) amount to 5.006 kg/kg and 0.663 kg/% respectively. Results showed that CR of gain from birth to weaning was highly significant with dam’s DMY, whereas was significant with MPP. Both DMY and MPP had significant and positive relationship with gain between birth weight and weight at six months, where amount of CR was 4.859 kg/kg and 0.619 kg/% with determination coefficient (R2) amount to 0.31 and 0.19 sequentially. Also, positive and significant regression was noticed for gain from birth to 6 months with MPP and milk Solids Not-Fat(SNF) percentages. Exponential functions also were used according to analysis of non-linear regression with calculated R2 for growth in Awassi lambs. Results showed that relationship which derives from regression weight at 6 months on weight at weaning according to equation WT6^=a+b WWT2 is considered the best because increasing value of R2 which was 0.69. we conclude, possibility prediction in lamb’s growth from birth to six months depend on DMY and MPP, also dependence non-linear functions gave an important results to describe growth curves between weaning to 6 months.

scholarly journals Dataset on growth curves of Boer goats fitted by ten non-linear functions

Data in Brief ◽  
2019 ◽  
Vol 23 ◽  
pp. 103672 ◽  
Author(s):  
J.G. García-Muñiz ◽  
R. Ramírez-Valverde ◽  
R. Núñez-Domínguez ◽  
J.A. Hidalgo-Moreno
Keyword(s):  
Growth Curves ◽  
Linear Functions ◽  
Non Linear ◽  
Boer Goats

scholarly journals Study of mtDNA COI Gene Polymorphism and Relationship With Some Productive Traits in Awassi Sheep

2021 ◽  
Vol 910 (1) ◽  
pp. 012002
Author(s):  
Ahmed Ismael Khalaf ◽  
Nasr Noori Al-Anbari
Keyword(s):  
Gene Polymorphism ◽  
Milk Yield ◽  
Growth Traits ◽  
Scientific Progress ◽  
Coi Gene ◽  
Research Station ◽  
Sequencing Analysis ◽  
Lactation Period ◽  
Mtdna Coi ◽  
Awassi Sheep

Abstract This study was carried out in two locations (the field part), first in the Ruminants Researches Station (20 km west of Baghdad), and the second in the Aldawar research station located in Anbar governorate (Up to 35 km west of Ramadi city), which included 87 animals from Awassi sheep. As for the laboratory part, it took place in two locations, the first in the Animal Breeding and Improvement Laboratory of the Ruminant Research Department, and the second in the Scientific Progress Laboratory/Baghdad. This study aimed to investigate the relationship between polymorphism of mtDNA-COI gene and growth traits, milk yield, and lactation period in Awassi sheep. DNA was extracted from the blood and the polymerase Chain Reaction (PCR) technique was used to amplify the COI gene. DNA sequencing analysis. The results showed that there are 6 SNPs in a COI gene, there polymorphism for this gene also appeared (TT, CC). The 1st site (5566), CC polymorphism achieved the highest percentages (39.09) compared with TT polymorphism, with an allelic frequency of 0.57. While it appeared in the 2nd, 3rd, 4th, and 6th sites the polymorphism TT and CC with percentages (79.31 and 20.69)%, (58.42 and 41.38)%, (20.69 and 79.31), (79.31 and 20.69)%, and with the allele frequency (0.79 and 0.21), (0.59 and 0.41), (0.21 and 0.79), (0.79 and 0.21) respectively. there were significant differences (P<0.05) of COI polymorphism in birth weight, weaning weight and gain from birth to weaning as the TT recorded the highest average for both traits (3.82, 25.39 and 21.57 kg respectively). The mean of daily milk yield for TT polymorphism was 330.21 gm/day, which significant (P<0.05) the CC polymorphism, no significant between COI polymorphism and lactation period. It was possible to conclude from this study the possibility of COI gene polymorphism in the development of genetic improvement strategies and breeding programs that achieved the best productive performance sheep.

scholarly journals Filtration of parameters of the Heston model

2020 ◽  
pp. 48-55
Author(s):  
О.А. Кобилін ◽  
О.Є. Путятіна ◽  
М.В. Гарячий
Keyword(s):  
Linear Function ◽  
Financial Market ◽  
Stock Price ◽  
Linear Functions ◽  
Heston Model ◽  
Model Parameters ◽  
Filtration Problem ◽  
Practical Applications ◽  
Non Linear

In this article we consider the Heston model of the stock price behaviour. While the volatility of the model is the non-linear function of another stochastic unobservable function, that is why we consider linearizing all non-linear functions of the model. The aim is to make the Heston model simpler for practical applications, in particular for solving the filtration problem. The filtration problem for the models of the financial market consists of evaluating of unobservable model parameters, having got the stock price observations.

scholarly journals On the calculus of symbols.—Fourth memoir. With applications to the theory of non-linear differential equations

1864 ◽  
Vol 13 ◽  
pp. 423-432
Keyword(s):  
Differential Equations ◽  
Linear Function ◽  
Linear Equations ◽  
Linear Differential Equations ◽  
Linear Functions ◽  
Non Linear ◽  
Linear Differential ◽  
Non Linear Equations

In the preceding memoirs on the Calculus of Symbols, systems have been constructed for the multiplication and division of non-commutative symbols subject to certain laws of combination; and these systems suffice or linear differential equations. But when we enter upon the consideration of non-linear equations, we see at once that these methods do not apply. It becomes necessary to invent some fresh mode of calculation, and a new notation, in order to bring non-linear functions into a condition which admits of treatment by symbolical algebra. This is the object of the following memoir. Professor Boole has given, in his 'Treatise on Differential Equations,’ a method due to M. Sarrus, by which we ascertain whether a given non-linear function is a complete differential. This method, as will be seen by anyone who will refer to Professor Boole s treatise, is equivalent to finding the conditions that a non-linear function may be externally divisible by the symbol of differentiation. In the following paper I have given a notation by which I obtain the actual expressions for these conditions, and for the symbolical remainders arising in the course of the division, and have extended my investigations to ascertaining the results of the symbolical division of non-linear functions by linear functions of the symbol of differentiation. Let F ( x, y, y 1 , y 2 , y 3 . . . . y n ) be any non-linear function, in which y 1 , y 2 , y 3 . . . . y n denote respectively the first, second, third, . . . . n th differential of y with respect to ( x ).

scholarly journals Maternal and direct genetic parameters for tail length, tail lesions and growth traits in pigs

2020 ◽  
Author(s):  
Sheila Aikins-Wilson ◽  
Mehdi Bohlouly ◽  
Sven König
Keyword(s):  
Maternal Effects ◽  
Genetic Parameters ◽  
Growth Traits ◽  
Tail Length ◽  
Breeding Value ◽  
Research Station ◽  
Weaning Weight ◽  
Tail Biting ◽  
Breeding Goal ◽  
Positive Direct

Abstract Tail length and tail lesions are major trigger for tail biting in pigs. Against this background, two datasets were analyzed to estimate genetic parameters for tail characteristics and growth traits. Dataset 1 considered measurements for trait tail length (T-LEN) and for the growth traits birth weight (BW), weaning weight (WW), post weaning weight (PWW) and average daily gain (ADG) from 9,348 piglets. Piglets were born in the period from 2015 to 2018, and kept on the university Gießen research station. Dataset 2 included 4,943 binary observations from 1,648 pigs from the birth years 2016 to 2019 for tail lesions (T-LES) as indicators for nail necrosis, tail abnormalities or tail biting. Tail lesions were recorded at 30 ± 7 days after entry for rearing (T-Les-1), at 50 ± 7 days after entry for rearing (end of rearing period, T-LES-2), and 130 ± 20 days after entry for rearing (end of fattening period, T-LES-3). Genetic statistical model evaluation for dataset 1 based on Akaike’s information criterion and likelihood ration tests suggested multiple-trait animal models considering covariances between direct and maternal genetic effects. The direct heritability for T-LEN was 0.42 (±0.03), indicating the potential for genetic selection on short tails. The maternal genetic heritability for T-LEN was 0.05 (±0.04), indicating influence of uterine characteristics on morphological traits. The negative correlation between direct and maternal effects for T-LEN of -0.35 (±0.13), as well as the antagonistic relationships (i.e., positive direct genetic correlations in the range from 0.03 to 0.40) between T-LEN with the growth traits BW, WW, PWW and ADG, complicate selection strategies and breeding goal definitions. The correlations between direct effects for T-LEN and maternal effects for breeding goal traits, and vice versa, were positive, but associated with quite large SE. The heritability for T-LES when considering the three repeated measurements was 0.23 (±0.04) from the linear (repeatability of 0.30) and 0.21 (±0.06) (repeatability of 0.29) from the threshold model. The breeding value correlations between T-LES-3 with breeding values from the repeatability models were quite large (0.74 – 0.90), suggesting trait lesion recording at the end of the rearing period. To understand all genetic mechanisms in detail, ongoing studies are focusing on association analyses between T-LEN and T-LES, and the identification of tail biting from an actor’s perspective.

Reproductive performance of ewe lambs: genetic correlation with weaning weight and subsequent reproductive performance

1976 ◽  
Vol 16 (80) ◽  
pp. 321 ◽  
Author(s):  
R Barlow ◽  
CJ Hodges
Keyword(s):  
Genetic Correlation ◽  
Reproductive Performance ◽  
Agricultural Research ◽  
Reproductive Rate ◽  
Research Station ◽  
Weaning Weight ◽  
Net Reproductive Rate ◽  
Ewe Lambs ◽  
Ewe Lamb ◽  
Selection For

The reproductive performance of Merino ewe lambs was examined in flocks with different selection histories for growth to weaning and net reproductive rate. These ewes were drawn from selection flocks maintained at the Agricultural Research Station, Trangie. There was evidence of a positive genetic correlation between weaning weight and reproductive performance of ewe lambs. Selection for weaning weight had a significant effect on the percentage of ewes lambing (P < 0.05). This appeared to be a function of a higher level of fertility (P <0.05) and a higher proportion of ewes mating (n.s.). The proportion of ewes apparently in oestrus during a 39 day teasing period, prior to joining, was significantly influenced by selection for weaning weight (P < 0.05). Simultaneous selection for increased net reproductive rate, weaning weight and clean fleece weight did not result in higher ewe lamb performance than that achieved by selection for increased weaning weight alone. No conclusion could be drawn from these data about the correlation between net reproductive rate and reproductive performance of ewe lambs.

scholarly journals I. On the calculus of symbols.— Fourth memoir. With applications to the theory of non-linear differential equations

1864 ◽  
Vol 13 ◽  
pp. 126-126
Keyword(s):  
Differential Equations ◽  
Linear Function ◽  
Nonlinear Equations ◽  
Linear Differential Equations ◽  
Linear Functions ◽  
Non Linear ◽  
Linear Differential

In the preceding memoirs on the Calculus of Symbols, systems have been constructed for the multiplication and division of non-commutative symbols subject to certain laws of combination; and these systems suffice for linear differential equations. But when we enter upon the consideration of nonlinear equations, we see at once that these methods do not apply. It becomes necessary to invent some fresh mode of calculation, and a new notation, in order to bring non-linear functions into a condition which admits of treatment by symbolical algebra. This is the object of the following memoir. Professor Boole has given, in his ‘Treatiseon Differential Equations/ a method due to M. Sarrus, by which we ascertain whether a given non-linear function is a complete differential. This method, as will be seen by anyone who will refer to Professor Boole’s treatise, is equivalent to finding the conditions that a non-linear function may be externally divisible by the symbol of differentiation. In the following paper I have given a notation by which I obtain the actual expressions for those conditions, and for the symbolical remainders arising in the course of the division, and have extended my investigations to ascertaining the results of the symbolical division of non linear functions by linear functions of the symbol of differentiation.

scholarly journals Detection of GHR|AluI gene polymorphism and its association with body weight of Madura cattle in Indonesian Beef Cattle Research Station

2021 ◽  
Vol 888 (1) ◽  
pp. 012013
Author(s):  
Hartati ◽  
N H Krisna ◽  
F Firdaus ◽  
S P Rahmadani ◽  
B D P Soewandi
Keyword(s):  
Body Weight ◽  
Beef Cattle ◽  
Growth Traits ◽  
Population Sample ◽  
Growth Trait ◽  
Allele Frequencies ◽  
Research Station ◽  
Weaning Weight ◽  
Genotype Frequencies ◽  
Ghr Gene

Abstract Madura cattle is a one of the native cattle that are genetically tolerant of tropical climates. Madura cattle are one of the beef cattle breeds in Indonesia. Madura cattle can be a superior breed, but improving growth trait in Madura cattle needs to be conducted. The early step that was needed was for detecting the genes which were involved in growth traits. The purpose of this research was for detecting GHR gene polymorphisms and its association with body weight of Madura cattle population in Indonesian Beef Cattle Research Station. This study used 110 DNA samples of Madura cattle that was collected from the experimental barn at Indonesian Beef Cattle Research Station. DNA samples were extracted by DNA extraction kit. Genotype of GHR gene was detected by PCR-RFLP method using AluI restriction enzymes. In this study, association genotype and body weight was analysed by univariate GLM method. The birth weight, weaning weight, yearling weight and 18 months weight of Madura cattle were 16.8±0.3 kg; 82.4±2.3 kg; 124.6±3.7 kg and 166.7±5.0 kg, respectively. The GHR genes of Madura cattle had 3 genotypes AA, AG and GG and genotype frequencies of GHR gene were 0.273 (AA), 0.373 (AG), 0.355 (GG), respectively. Whereas the allele frequencies of A was 0.459 and the allele frequencies of G was 0.541. Based on Chi-square (X2) analysis showed that the population sample was not disequilibrium. The result of association analysis was significant (P <0.05) on weaning weight, yearling weight and 18 month weight. It was concluded that the GHR gene has potential as a genetic marker for growth traits and can be used as MAS in Madura cattle in Indonesian Beef Cattle Research Station.

Crossbreeding Jersey with Ghana Shorthorn and Sokoto Gudali cattle in a tropical environment: additive and heterotic effects for milk production, reproduction and calf growth traits

1994 ◽  
Vol 59 (1) ◽  
pp. 21-29 ◽  
Author(s):  
J. E. O. Rege ◽  
G. S. Aboagye ◽  
S. Akah ◽  
B. K. Ahunu
Keyword(s):  
Milk Production ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Reproductive Traits ◽  
Production Traits ◽  
Milk Production Traits ◽  
Weaning Weight ◽  
Calf Growth ◽  
Daily Gain ◽  
Better Than

AbstractCrossbreeding data involving Ghana Shorthorn, Sokoto Gudali and their Jersey F1s and backcrosses collected over a 16-year period were analysed to estimate additive and heterotic effects for milk production, reproduction and calf growth traits. Sokoto Gudali was significantly better than Ghana Shorthorn in all milk production traits. Calving interval and annualized milk production were better in Gudali than in the Shorthorn. The F1s had higher lactation milk yield, milked longer, produced their first calves earlier and had shorter dry periods and calving intervals than their corresponding purebreds. However, genotype was not significant for number of services per conception. Both F1s had higher average daily gain and weaning weight than their corresponding purebreds. Sokoto Gudali backcross (Jersey × F1) was significantly (P < 0·05) better than the F1 in lactation length. However, in Gudali crosses, there was no advantage in increasing the proportion of Jersey genes beyond 0·5 for milk production traits. Additive effects were significantly (at least P < 0·05) lower in the Shorthorn and the Gudali than in Jersey for milk production traits except proportion of butterfat. Heterosis estimates were significant (P < 0·01) for milk production traits for the Shorthorn but not for the Gudali. Heterotic effects were large and significant (at least P < 0·05) in improving annualized milk production in Shorthorn crosses, whilst none of the heterotic effects for reproductive traits was significant. At both 0 and 0·5 levels of Jersey inheritance, the Gudali was superior (P < 0·01) to the Shorthorn in birth weight, weaning weight and pre-weaning average daily gain. Heterotic effects for calf traits were positive and much larger in Gudali crosses than in Shorthorn crosses. In general, backcrosses were, at best, similar to the F1s implying that upgrading these indigenous breeds beyond 0·5 European inheritance may not be desirable.

The Florina (Pellagonia) sheep breed

1997 ◽  
Vol 22 ◽  
pp. 7-13
Author(s):  
D. Triantafillidis ◽  
C. Ligda ◽  
A. Georgoudis ◽  
J. Boyazoglu
Keyword(s):  
Milk Production ◽  
Litter Size ◽  
Agricultural Research ◽  
Animal Husbandry ◽  
Sheep Breed ◽  
Research Station ◽  
Lactation Period ◽  
Agricultural Research Station ◽  
Average Litter Size ◽  
Resistance To Diseases

SummaryThe Florina (or Pellagonia) sheep, which have descended from ancient indigenous Greek populations, are on the way to extinction. A small number of animals are found in the region of West Macedonia. The breed belongs to the semi fat-tailed Ruda wool type sheep, is well adapted to harsh mountain conditions and shows resistance to diseases. Recorded farms are kept at the Agricultural Research Station of Koila in Kozani, at the T. E. I. farm of Florina, at the Animal Husbandry Institute of Gianitsa and at the Agricultural Research Station of Komotini. The average commercialised milk production is 96±38.6 kg during a lactation period of 156 days and the average litter size is 1.4±0.52.

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