scholarly journals Evaluation of Simultaneous Selection for Live Body Weight and Against Abdominal Fat in Broilers

1985 ◽  
Vol 64 (7) ◽  
pp. 1257-1263 ◽  
Author(s):  
AVIGDOR CAHANER ◽  
ZAFRIRA NITSAN
Keyword(s):  
Body Weight ◽  
Abdominal Fat ◽  
Live Body Weight ◽  
Simultaneous Selection ◽  
Selection For

Relationships between body weight and some follicle and fleece characters in an Australian fine-wool Merino flock

1969 ◽  
Vol 20 (6) ◽  
pp. 1177 ◽  
Author(s):  
T Nay ◽  
RH Hayman
Keyword(s):  
Body Weight ◽  
Correlation Coefficient ◽  
Unit Area ◽  
Additive Effect ◽  
Phenotypic Correlations ◽  
Close Relationship ◽  
Simultaneous Selection ◽  
Selection For ◽  
Fleece Weight ◽  
Highly Correlated

Phenotypic correlations between body weight, follicle characters, and fleece characters have been investigated in a flock of 95 fine-wool non-Peppin Merino wethers, reared in the same locality under the same conditions. The results indicated that three follicle characters, follicle chord, follicle depth, and the index of follicle bending, were independent of body weight. It was found, in agreement with the results of other workers, that body weight was highly correlated with both greasy and clean wool weights (r = 0.53 and 0.51 respectively). It was also found that follicle characters were significantly correlated with most of the fleece characters which contribute to the clean fleece weight per unit area of skin. The correlation coefficient of wool weight per unit area of skin with follicle chord was 0.33, with follicle depth 0.28, and with follicle bending index –0.35. The follicle characters were also correlated with greasy and clean fleece weights. Crimp number per inch was predicted for individual animals by using as criterion the length of the follicle chord. A highly significant correlation coefficient of 0.67 was obtained between predicted and observed crimp number. The close relationship between crimp chord and follicle chord reported in previous work was confirmed. It is suggested that simultaneous selection for body weight and certain follicle characters may have an additive effect on the production of clean wool. It is also suggested that the genetic antagonism between clean wool weight and number of crimps per inch can be explained in anatomical terms.

scholarly journals Study of failures in a rabbit line selected for growth rate

2016 ◽  
Vol 24 (1) ◽  
pp. 47 ◽  
Author(s):  
C. Naturil-Alfonso ◽  
R. Lavara ◽  
P. Millán ◽  
P.G. Rebollar ◽  
J.S. Vicente ◽  
...  
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Luteinizing Hormone ◽  
Ovulation Induction ◽  
Thickness Measurement ◽  
Live Body Weight ◽  
Lh Release ◽  
Fat Thickness ◽  
Selection For ◽  
Perirenal Fat

<p>Selection for growth rate is negatively related with reproductive fitness. The aim of this work was to analyse the causes of fertility failure in rabbit does selected for growth rate and characterised for reproductive deficiencies (line R). In the experiment, 82 does were divided into 2 groups: naturally mated (NM) and artificially inseminated (AI), to relate luteinizing hormone (LH) concentration with ovulation induction and pregnancy rate by laparoscopic determination. Additionally, in 38 of these females ovulation rate and metabolites determination (leptin, NEFA, BOHB and glucose) were analysed and perirenal fat thickness measurement and live body weight (LBW) determined. The results showed that all ovulated does (both NM and AI) presented higher concentrations of LH than non-ovulated females. In addition, non-ovulated females showed high levels of leptin and BOHB, as well as LBW. Females from line R have an inherit reduced fertility due to ovulation failure as a consequence of a reduction in LH release, which could be explained by a heavier body weight and higher leptin concentrations.</p>

scholarly journals Production and body composition traits of broilers in relation to breast weight evaluated by path analysis

2011 ◽  
Vol 68 (3) ◽  
pp. 320-325 ◽  
Author(s):  
Leandro Homrich Lorentz ◽  
Leila de Genova Gaya ◽  
Raquel Lunedo ◽  
José Bento Sterman Ferraz ◽  
Fernanda Marcondes de Rezende ◽  
...  
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Path Analysis ◽  
Partial Correlation ◽  
Correlation Coefficients ◽  
Breast Muscle ◽  
Live Body Weight ◽  
The Matrix ◽  
Selection For ◽  
Breast Weight

Breast weight has great economic importance in poultry industry, and may be associated with other variables. This work aimed to estimate phenotypic correlations between performance (live body weight at 7 and 28 days, and at slaughter, and depth of the breast muscle measured by ultrasonography), carcass (eviscerated body weight and leg weight) and body composition (heart, liver and abdominal fat weight) traits in a broiler line, and quantify the direct and indirect influence of these traits on breast weight. Path analysis was used by expanding the matrix of partial correlation in coefficients which give the direct influence of one trait on another, regardless the effect of the other traits. The simultaneous maintenance of live body weight at slaughter and eviscerated body weight in the matrix of correlations might be harmful for statistical analysis involving systems of normal equations, like path analysis, due to the observed multicollinearity. The live body weight at slaughter and the depth of the breast muscle as measured by ultrasonography directly affected breast weight and were identified as the most responsible factors for the magnitude of the correlation coefficients obtained between the studied traits and breast weight. Individual pre-selection for these traits could favor an increased breast weight in the future reproducer candidates of this line if the broilers' environmental conditions and housing are maintained, since the live body weight at slaughter and the depth of breast muscle measured by ultrasonography were directly related to breast weight.

Genetic parameters for a heavy female turkey line

2005 ◽  
Vol 2005 ◽  
pp. 9-9
Author(s):  
A. D. Kranis ◽  
J. A. Woolliams ◽  
W. G. Hill ◽  
P. M. Hocking
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Genetic Parameters ◽  
Selection Criterion ◽  
Breast Muscle ◽  
Commercial Company ◽  
Egg Number ◽  
Research Population ◽  
Simultaneous Selection ◽  
Selection For

The major selection criterion in the turkey breeding industry is increased breast muscle and body weight in order to adapt to market demands. In female lines a dual selection for both body weight and egg production is performed. However, most published estimates indicate a variable correlation between growth and egg number (Nestor et al., 1996) and so the challenge posed is how to best to select for those opposing goals. The objective of this study was to investigate the effects of simultaneous selection for body weight and egg number by estimating the genetic parameters for a research population held by a commercial company in two different locations.

scholarly journals Prediction of Fat and Fat Free Live Weight in Broiler Chickens Using Backskin Fat, Abdominal Fat, and Live Body Weight

1979 ◽  
Vol 58 (4) ◽  
pp. 835-842 ◽  
Author(s):  
WALTER A. BECKER ◽  
JOHN V. SPENCER ◽  
LARRY W. MIROSH ◽  
JOHN A. VERSTRATE
Keyword(s):  
Body Weight ◽  
Broiler Chickens ◽  
Live Weight ◽  
Abdominal Fat ◽  
Live Body Weight

scholarly journals LIVE BODY WEIGHT, CARCASS AND ABDOMINAL FAT PERCENTAGE OF BROILER CHICKEN AFFECTED BY HERBAL DRINK

2021 ◽  
Vol 9 (04) ◽  
pp. 348-352
Author(s):  
Sri Setyaningrum ◽  
◽  
Dini Julia Sari Siregar ◽  
Keyword(s):  
Body Weight ◽  
Experimental Design ◽  
Crude Protein ◽  
Broiler Chicken ◽  
Basal Diet ◽  
Abdominal Fat ◽  
Metabolizable Energy ◽  
Fat Percentage ◽  
Live Body Weight

The aim of the research was to determine the live body weight, carcass percentage, and percentage of abdominal fat in broiler chicken affected by herbal drinks.One hundred twenty birds of DOC was used in the research. Basal diet contain of metabolizable energy 3000 kcal/kg and crude protein 22%.Experimental design used was completely Randomized Designed with 6 treatments and 4 replicates, every replicates consist of five 5 birds. The treatments were as follows: T0: control (without herbal drink), T1: basal diet + 10% of herbal drink, T2: basal diet + 20% of herbal drink, T3: basal diet + 30% of herbal drink, T4: basal diet + 40% of herbal drink and T5: basal diet + 50% of herbal drink. The parameters observed werelive body weight, carcass percentage and abdominal fat percentage. The result showed that herbal drink significantly (p <0.05) increased live body weight and carcass percentage and decrease the abdominal fat percentage. The conclusion was herbal drinks increase the live body weight and carcass percentage and decrease the abdominal fat percentage of broiler chicken.

ESTIMASI NILAI HERITABILITAS BOBOT IKAN MAS VARIETAS PUNTEN DALAM PROGRAM SELEKSI INDIVIDU

2016 ◽  
Vol 11 (3) ◽  
pp. 217
Author(s):  
Estu Nugroho ◽  
Budi Setyono ◽  
Mochammad Su’eb ◽  
Tri Heru Prihadi
Keyword(s):  
Body Weight ◽  
Selection Response ◽  
Base Population ◽  
Breeding Programs ◽  
Male And Female ◽  
Body Weight Trait ◽  
Population Selection ◽  
Selection For ◽  
Weight Trait ◽  
Selection Of

Program pemuliaan ikan mas varietas Punten dilakukan dengan seleksi individu terhadap karakter bobot ikan. Pembentukan populasi dasar untuk kegiatan seleksi dilakukan dengan memijahkan secara massal induk ikan mas yang terdiri atas 20 induk betina dan 21 induk jantan yang dikoleksi dari daerah Punten, Kepanjen (delapan betina dan enam jantan), Kediri (tujuh betina dan 12 jantan), Sragen (27 betina dan 10 jantan), dan Blitar (15 betina dan 11 jantan). Larva umur 10 hari dipelihara selama empat bulan. Selanjutnya dilakukan penjarangan sebesar 50% dan benih dipelihara selama 14 bulan untuk dilakukan seleksi dengan panduan hasil sampling 250 ekor individu setiap populasi. Seleksi terhadap calon induk dilakukan saat umur 18 bulan pada populasi jantan dan betina secara terpisah dengan memilih berdasarkan 10% bobot ikan yang terbaik. Calon induk yang terseleksi kemudian dipelihara hingga matang gonad, kemudian dipilih sebanyak 150 pasang dan dipijahkan secara massal. Didapatkan respons positif dari hasil seleksi berdasarkan bobot ikan, yaitu 49,89 g atau 3,66% (populasi ikan jantan) dan 168,47 g atau 11,43% (populasi ikan betina). Nilai heritabilitas untuk bobot ikan adalah 0,238 (jantan) dan 0,505 (betina).Punten carp breeding programs were carried out by individual selection for body weight trait. The base population for selection activities were conducted by mass breeding of parent consisted of 20 female and 21 male collected from area Punten, eight female and six male (Kepanjen), seven female and 12 male (Kediri), 27 female and 10 male (Sragen), 15 female and 11 male (Blitar). Larvae 10 days old reared for four moths. Then after spacing out 50% of total harvest, the offspring reared for 14 months for selection activity based on the sampling of 250 individual each population. Selection of broodstock candidates performed since 18 months age on male and female populations separately by selecting based on 10% of fish with best body weight. Candidates selected broodstocks were then maintained until mature. In oder to produce the next generation 150 pairs were sets and held for mass spawning. The results revealed that selection response were positive, 49.89 g (3.66%) for male and 168.47 (11.43%) for female. Heritability for body weight is 0.238 (male) and 0.505 (female).

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