2015
DOI: 10.1590/1516-635x1704473-482 View full text |Buy / Rent full text
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TM Shafey,
ES Hussein,
AH Mahmoud
et al.

Abstract: The relationships between egg measurements [egg weight (EGWT), egg width (EGWD), egg shape index (EGSI), egg volume (EGV) and egg density (EGD)], and egg components [eggshell (SWT), yolk (YWT) and albumen (AWT)] were investigated in laying hens with 32, 45, and 59 weeks of age with an objective of managing multicollinearity (MC), using stepwise regression (SR) and ridge regression (RR) analyses.There were significant correlations among egg traits that led to MC problems in all eggs. Hen age influenced egg char… Show more

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“…The coefficients of phenotypic correlations between the internal and external egg quality traits considered are shown in Table 4. A significant positive correlation (p < 0.01) was found between the egg weight and both the yolk weight (0.60) and albumen weight (0.91), which is consistent with the results of most studies (Suk & Park, 2001;Wolanski et al, 2007;Moula et al, 2010;Debnath & Ghosh, 2015;Shafey et al, 2015;Kgwatalala et al, 2016;Molnár et al, 2016;Ahmadu et al, 2018). Furthermore, the egg weight was found negatively correlated (p < 0.05) with the yolk ratio (-0.20) and positively correlated with the albumen ratio (0.25), which is also consistent with the results of a number of studies (Olawumi & Ogunlade, 2008;Moula et al, 2010;Debnath & Ghosh, 2015;Shafey et al, 2015;Inca et al, 2020).…”
Section: Phenotypic Correlations Between the External And Internal Eg...supporting
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“…The coefficients of phenotypic correlations between the internal and external egg quality traits considered are shown in Table 4. A significant positive correlation (p < 0.01) was found between the egg weight and both the yolk weight (0.60) and albumen weight (0.91), which is consistent with the results of most studies (Suk & Park, 2001;Wolanski et al, 2007;Moula et al, 2010;Debnath & Ghosh, 2015;Shafey et al, 2015;Kgwatalala et al, 2016;Molnár et al, 2016;Ahmadu et al, 2018). Furthermore, the egg weight was found negatively correlated (p < 0.05) with the yolk ratio (-0.20) and positively correlated with the albumen ratio (0.25), which is also consistent with the results of a number of studies (Olawumi & Ogunlade, 2008;Moula et al, 2010;Debnath & Ghosh, 2015;Shafey et al, 2015;Inca et al, 2020).…”
Section: Phenotypic Correlations Between the External And Internal Eg...supporting
“…Moreover, a positive correlation between egg weight and shell weight has also been reported in numerous studies (Suk & Park, 2001;Wolanski et al, 2007;Moula et al, 2010;Shafey et al, 2015;Molnár et al, 2016;Sirri et al, 2018;Inca et al, 2020). The established absence of significant correlation between egg weight and shape index is consistent with the results of Şekeroğlu & Altuntaş (2009), Shafey et al (2015), Kgwatalala et al (2016), and Ukwu et al (2017). The positive correlation found by Moula et al (2010) stands in contrast to the negative correlation reported by Debnath & Ghosh (2015) and Inca et al (2020).…”
Section: ____________________________________________________________...supporting
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“…Shell problems tend to occur in mature birds and have been associated with increased in size and decreased in shell quality (Shafey, Hussein, Mahmoud, Abouheif, & Al-Batshan, 2015;Xiao et al, 2015). It is also known that the activity of the 25-hydroxycholecalciferol-1-hydroxylase enzyme decreases and therefore, calcium absorption (Joyner, Peddie, & Taylor, 1987;Xiao et al, 2014).…”
Section: Discussionmentioning