Maternal effects on embryonic and post‐embryonic growth in poultry

Al‐Murrani, W. K.

doi:10.1080/00071667808416476

Cited by 64 publications

(16 citation statements)

References 9 publications

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“…Any maternal effects in poultry have to be egg-related because there is no permanent "litter" environment. Al-Murrani (1978) showed a significant effect of egg weight and protein content on body weight from hatching up to 56 d of age. Because the effect on body weight is apparent for several weeks, it is actually not that surprising that significant maternal effects were also observed for residual feed intake.…”

Section: Discussionmentioning

confidence: 96%

Quantitative trait locus detection in commercial broiler lines using candidate regions1

Koning¹,

Windsor

Hocking³

et al. 2003

Journal of Animal Science

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ABSTRACT:A QTL that explained a large proportion of the phenotypic difference between broiler and layer chickens in an experimental cross was evaluated in a commercial broiler line. A three-generation design, consisting of 15 grandsires, 608 half-sib hens, and more than 50,000 third-generation offspring, was implemented within the existing breeding scheme of a broiler breeding company. Four markers from a candidate region on chicken chromosome 4 were selected for their informativeness in the grandsires and used to genotype the first two generations. Using half-sib analyses, linkage was studied between these markers and 13 growth and carcass traits. The QTL analyses confirmed the presence of significant QTL for body weight (P < 0.01) and residual feed intake (P < 0.05) on chicken chromosome 4. Furthermore, evidence was found for QTL af-

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Section: Discussionmentioning

confidence: 96%

Quantitative trait locus detection in commercial broiler lines using candidate regions1

Koning¹,

Windsor

Hocking³

et al. 2003

Journal of Animal Science

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“…With larger fresh eggs, there are more resources available within the egg's closed environment for the embryo to use during development. Thus, larger eggs have larger embryos (Al-Murrani, 1978). During embryonic development, the absolute weight of pigeon embryo increases constantly with age.…”

Section: Development Of Embryosmentioning

confidence: 99%

Growth of embryo and gene expression of nutrient transporters in the small intestine of the domestic pigeon (Columba livia)

Mingxia

Yang

et al. 2015

J. Zhejiang Univ. Sci. B

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Abstract:The objective of this study was to investigate the relationship between gene expression of nutrient (amino acid, peptide, sodium and proton) transporters in the small intestine and embryonic growth in domestic pigeons (Columba livia). One hundred and twenty-five fertilized eggs were randomly assigned into five groups and were incubated under optimal conditions (temperature of 38.1 °C and relative humidity of 55%). Twenty embryos/birds from each group were sacrificed by cervical dislocation on embryonic day (E) 9, 11, 13, 15 and day of hatch (DOH). The eggs, embryos (without yolk sac), and organs (head, brain, heart, liver, lungs, kidney, gizzard, small intestine, legs, and thorax) were dissected, cleaned, and weighed. Small intestine samples were collected for RNA isolation. The mRNA abundance of intestinal nutrient transporters was evaluated by real-time reverse transcription-polymerase chain reaction (RT-PCR). We classified these ten organs into four types according to the changes in relative weight during embryonic development. In addition, the gene expression of nutrient transporters was differentially regulated by embryonic day. AT, EAAT3, LAT4, PepT1, NHE2, NHE3, and y + LAT2 showed positive correlations with intestinal weight (0.80

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“…Broiler breeder eggs contain an excess of fat and moisture while protein store may be limited (Al-Murrani, 1978), and yolk protein is the origin of the required amino acids (AA) during embryogenesis (Gerhartz et al, 1999). Therefore, embryonic and post-embryonic performance may be improved by in-ovo injection of amino acids (Al-Murrani, 1982), and their derivatives either sporadic or in mixture.…”

Section: Introductionmentioning

confidence: 99%

Effect of in-ovo administration with two levels of amino acids mixture on the performance of Muscovy ducks

Gaafar

Selim

El-Ballal

2013

Emir. J. Food Agric

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Nutrient administration in-ovo could be considered as an alternative method to improve hatchability and duckling weight followed by better economic performance. On the 12th day of incubation, fertile duck eggs (n= 500) were distributed into 5 groups, each of 100. These were: un-injected control; 0.50 ml distilled water; 0.50 ml amino acids (AA) mixture; 0.75 ml distilled water; and 0.75 ml amino acids mixture. In-ovo injection of 0.50 ml but not 0.75 ml of AA mixture resulted in higher hatchability percentage than un-injected control; however this was not statistically confirmed. In-ovo injection of either 0.50 or 0.75 ml of AA mixture resulted in significantly (P < 0.05) higher body weight at hatch, marketing weight for males not for females, and higher feed intake than the un-injected control. There was no significant difference (P < 0.05) in feed conversion ratio between in-ovo amino acids ducks and un-injected control during the whole experimental periods. Liver weight as a percentage of body weight was higher (P < 0.05) in the in-ovo amino acids injected groups than un-injected control. Lymphoid organs of 0.50 AA-injected male group and 0.75 ml AA-injected female group were significantly (P < 0.05) heavier than the un-injected control. Antibodies titers did not differ (P < 0.05) between in-ovo amino acids injected groups and un-injected control. It is concluded that in-ovo injection of amino acids mixture may improve and accelerate growth and post-hatch performance of Muscovy ducks.

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Maternal effects on embryonic and post‐embryonic growth in poultry

Cited by 64 publications

References 9 publications

Quantitative trait locus detection in commercial broiler lines using candidate regions1

Quantitative trait locus detection in commercial broiler lines using candidate regions1

Growth of embryo and gene expression of nutrient transporters in the small intestine of the domestic pigeon (Columba livia)

Effect of in-ovo administration with two levels of amino acids mixture on the performance of Muscovy ducks

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