S. Tabatabaei  , R.A. Batavani  , A.R. Talebi  , 
    Comparison of Semen Quality in Indigenous and Ross Broiler Breeder Roosters,
    Journal of Animal and Veterinary Advances,
    Volume 8,Issue 1,
    2009,
    Pages 90-93,
    ISSN 1680-5593,
    javaa.2009.90.93,
    (https://makhillpublications.co/view-article.php?doi=javaa.2009.90.93)
    Abstract: The aim of this study, was to evaluate the effect of rooster strain (Indigenous and Ross-308 broiler breeder roosters) on semen quality. Total of 90 semen samples were collected from 15 Ross-308 and 15 Indigenous roosters at 3 days interval. Semen was collected from roosters by abdominal massage. After dilution, semen samples were examined microscopically for quality parameters (sperm concentration, live-dead proportion, motility rate and morphological defects of sperm). The concentration of spermatozoa in Indigenous and Ross broiler breeder roosters were 3.3&plusmn;0.38x10<SUP>9</SUP> and 6.6&plusmn;0.53x10<SUP>9</SUP> ML<SUP>-1</SUP>, respectively (p&lt;0.01). The motility rate of spermatozoa in ross roosters were 78&plusmn;1.7% and significantly (p&lt;0.01) differed from those of indigenous roosters (86.5&plusmn;0.78%). The viability rate in ross males were 82.25&plusmn;2.04% and in indigenous roosters were 89.63&plusmn;1.32% (p&lt;0.01). The percentage of morphological defects in ross and indigenous males were 10.13&plusmn;0.40 and 7.00&plusmn;0.53%, respectively (p&lt;0.01). Total acrosome, head, mid-piece and tail abnormalities in ross roosters were 12.55&plusmn;0.33, 25.91&plusmn;0.13, 20.55&plusmn;0.07 and 41.04&plusmn;0.19%, while in Indigenous roosters were 14.31&plusmn;0.18, 31.4&plusmn;0.24, 10.15&plusmn;0.11 and 44.1&plusmn;0.26%, respectively and the differences were significant (p&lt;0.01). It is concluded that semen quality could be different between genetically improved (Ross-308 strain) and indigenous roosters.
    Keywords: Cock;strain;breeder;sperm quality