| Journal: |
Assiut Veterinary Medical Journal
Assiut university
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| Abstract: |
This study aims to explore the relationships between categorical variables using
Correspondence Analysis (CA), a statistical technique designed to visualize and interpret
associations in contingency tables. By applying CA, we seek to uncover underlying patterns
in the structure of count data. The variables under study were structural chromosomal
aberrations and some diseases related to infertility in Egyptian buffalo. Structural
chromosomal aberrations were divided into 6 categories (gap, break, deletion, fragment, ring
chromosome and centromeric attenuation). Groups of animal diseases were 9 categories
(control, repeat breeder, anestrum, retained placenta, free-martin, vaginal prolapse, uterine
prolapse, uterine torsion and habitual abortion). The Chi-square test of independence
revealed a statistically significant association, indicating a relationship between
chromosomal aberrations and infertility groups. CA further supported this association, with
a total inertia of 0.178, suggesting that approximately 17.8% of the variation in the data is
explained by the relationship between these two variables. Dimensions 1 and 2 captured most
of the data structure, explaining 53.5% and 27.2% of the variance, respectively. Uterine
torsion and abortion were highly contributed to explaining data variance in dimension 1. For
dimension-2, uterine prolapse, uterine torsion, and control were also highly contributed to
explaining variance. For the second variable, centromeric attenuation was highly significant
for dimension-1 and fragment and centromeric attenuation were highly contributed to
variance explaining than other structural chromosomal aberrations. Animal breeders can use
CA techniques in their farms to facilitate understanding the pattern of their data and graphical
representation of large data set.
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