Behiry, F., shabaan, H., Abdel-Kafy, E. (2025). Characterization, genetic evaluation, and genetic trends for some reproductive traits of Baladi Black rabbits does. Egyptian Poultry Science Journal, (), -. doi: 10.21608/epsj.2025.61805.1144
Fatma Mohammed Behiry; hoda Mohammed shabaan; El-Sayed Mahfouz Abdel-Kafy. "Characterization, genetic evaluation, and genetic trends for some reproductive traits of Baladi Black rabbits does". Egyptian Poultry Science Journal, , , 2025, -. doi: 10.21608/epsj.2025.61805.1144
Behiry, F., shabaan, H., Abdel-Kafy, E. (2025). 'Characterization, genetic evaluation, and genetic trends for some reproductive traits of Baladi Black rabbits does', Egyptian Poultry Science Journal, (), pp. -. doi: 10.21608/epsj.2025.61805.1144
Behiry, F., shabaan, H., Abdel-Kafy, E. Characterization, genetic evaluation, and genetic trends for some reproductive traits of Baladi Black rabbits does. Egyptian Poultry Science Journal, 2025; (): -. doi: 10.21608/epsj.2025.61805.1144
Characterization, genetic evaluation, and genetic trends for some reproductive traits of Baladi Black rabbits does
Articles in Press, Accepted Manuscript, Available Online from 19 May 2025
1Rabbits, turkey and water fowls researches Department, Animal and Poultry production research institute, Agriculture research center,Dokki, Giza, Egypt.
2rabbits, turkey, and waterfowls researches department, Animal production research institute, agriculture research center, Dokki, Giza, Egypt.
3Animal Production Research Institute Agricultural Research Center
Abstract
This study was conducted on 792 litters from 210 does of Baladi Black (BB) rabbits to make characterization, and genetic evaluation for some does reproductive traits of this rabbits included litter traits (litter size at birth; LSB, litter size born alive; LSA, litter size at 21 days; LS21, litter size at weaning; LSW, Litter weight at birth; LWB, Litter weight at weaning; LWW, and the pre-weaning mortality rate; PWM), conception traits (number of services per conception; NSC, and gestation length; GL), and interval traits (kindling interval; KI and days open; DO) and estimate genetic trends for these traits. Estimates of heritability (h2) for litter size and litter weight traits are low (0.08-0.14). The heritability for PWM is relatively moderate (0.15). Estimates of h2 for conception and interval traits are low (0.00-0.06). Repeatability (R) for all litter traits is low to moderate (0.11-0.34). The repeatability for PWM is moderate (0.16). Repeatability for conception and interval traits is low (0.01-0.11). Genetic correlations (rg) among all litter traits are positive and moderate to strong (0.23-0.92) except for this between LSB and LWW, and between LWB and PWM, it is negative (-0.16 and -0.08) respectively. The genetic correlations among conception and interval traits are positive and very strong (0.68-1.00) except this between GL and NSC it is negative (-0.77). The genetic trends for litter size traits are positive and low (0.02-0.04) rabbit/year-season except for the genetic trend for LSB it is negative (-0.01). The genetic trends for litter weight traits are low and negative for LWB and LWW (-0.001 and -0.01) grams/ year-season respectively, except this for LW21 it is positive (0.01). The genetic trend for PWM is high and negative (-0.53) young rabbit/year-season. The genetic trend for conception and interval traits is positive and low (0.001-0.20).
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