scholarly journals PRODUCTIVE PERFORMANCE IN LOCAL CHICKEN AFTER FIVE GENERATIONS OF CROSSING AND SELECTION FOR HIGH LIVE BODY WEIGHT

2017 ◽  
Vol 37 (3) ◽  
pp. 779-813
Author(s):  
farid naser
Keyword(s):  
Body Weight ◽  
Productive Performance ◽  
Live Body Weight ◽  
Selection For ◽  
Local Chicken

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.

Comportamiento productivo y características físicas de huevo producido por gallinas criollas Copetonas y Marans

2020 ◽  
Vol 13 (10) ◽  
Author(s):  
Leodan T. Rodríguez-Ortega ◽  
Alejandro Rodríguez-Ortega ◽  
Filogonio J. Hernández-Guzmán ◽  
Judith Callejas-Hernández ◽  
Arturo Pro-Martínez ◽  
...  
Keyword(s):  
Body Weight ◽  
Feed Intake ◽  
Design Methodology ◽  
Egg Production ◽  
Production Systems ◽  
Productive Performance ◽  
Live Body Weight ◽  
Productive Potential ◽  
Feeding Program ◽  
Main Factors

Objective: The present study was conducted to evaluate the productive performance and egg physical characteristics of two backyard-type breeds of birds. Design/methodology/approach: Tufted Creole Hens (TCH; 13 hens and a rooster) and Marans (13 hens and a rooster), were used in this study. Live body weight, feed intake, egg production, egg weight, egg length and egg width were measured weekly during eight weeks. Collected data were analyzed using a two-way analysis of variance, the main factors were breed, week and their interaction. Results: Marans hens were heavier and had higher feed intake than the TCH (P<0.05). The egg of the TCH was smaller (P <0.05) in weight and length with respect to that of Marans hens. TCH produced more eggs than the Marans hens (P <0.05). The week factor was significant (P <0.05) for body weight, feed intake and egg length. Limitations on study/implications: Further studies should be carried out to design a feeding program that would allow both breeds to express their full productive potential and maximize the return on investment in backyard production systems in Mexico. Findings/conclusions: Marans hens are a heavier breed due to their greater live body weight and feed intake with respect to TCH. The TCH are lighter birds but with a higher egg production when compared to the Marans.

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).

scholarly journals Evaluation of live-body weight and the number of eggs produced for introduced and local chickens in Ethiopia

2021 ◽  
pp. 1-7
Author(s):  
Setegn W. Alemu ◽  
Olivier Hanotte ◽  
Fasil G. Kebede ◽  
Wondmeneh Esatu ◽  
Solomon Abegaz ◽  
...  
Keyword(s):  
Body Weight ◽  
Live Body Weight ◽  
Local Chickens
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