Scientific Research Publishing

Read full paper at： http://www.scirp.org/journal/PaperInformation.aspx?PaperID=51323#.VGRwjWfHRK0 Author(s) Jose Maria Mancebo Quintana Affiliation(s) Freelance Researcher, Arenas de San Pedro, Spain . ABSTRACT We analyze here the keys of the original approach about the twofold cost: the return to the asexuality starting with a mutant female, with the same reproductive capacity than a sexual one, and with double genetic-reproductive success. We propose a new approach in which 1) all individuals in a population have regulatory mechanisms of reproductive mode, and when such change occurs, it happens in all its population at the same time; 2) after a change of reproductive mode in the population there can be ...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50564#.VESmzVfHRK0 Author(s) Mesfin Lakew 1* , Mussie Haile-Melekot 2 , Getinet Mekuriaw 2 , Solomon Abreha 3 , Haimanot Setotaw 3 Affiliation(s) 1 Sirinka Agricultural Research Center, Woldia, Ethiopia . 2 College of Agriculture and Environmental Sciences, Bahir Dar University, Bahir Dar, Ethiopia . 3 College of Agriculture, Wollo University, Dessie, Ethiopia . ABSTRACT The reproductive and lamb mortality data (n = 187) of the Local and crosses of Dorper × Local ewes following natural controlled breeding in Ethiopia were analysed. Data were collected during 2009-2011 at Sirinka breeding, evaluation and distribution site, eastern Amhara region of Ethiopia. Bree...