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beefmaster angus cross bull
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<blockquote data-quote="bbyou" data-source="post: 379181" data-attributes="member: 6338"><p>ALACOWMAN, </p><p>The question was "How is using unproven purebred bulls on F1 cows different from using an unproven F1 bull on purebred cows?" Point being, Unproven is Unproven.</p><p></p><p>I asked Robert L. (BOB) Weaber, Ph.D, PAS, Assistant Professor at the University of Missouri Columbia his thoughts on heterosis and crossbreeding. I have included a copy of his response below. </p><p></p><p><strong>"Thanks for you question regarding heterosis and crossbreeding. A frequently cited example of crossbreeding is the use of purebred bulls of one breed on F1 crossbred cows of two other breeds, (e.g. Charolais bulls on Hereford X Angus cows); known as a terminal sire F1 program. This type of system maximizes both maternal heterosis and individual (calf) heterosis and most estimates indicate heterosis in this program is worth about $100 per cow per year. Maternal heterosis (maximized in F1 cows) accounts for about 2/3 of the economic advantage of crossbreeding and, therefore, is important for a successful crossbreeding system. Purebred bulls on purebred cows of a different breed only captures the heterosis expressed by calves produced in this system and only gets 1/3 of the economic advantage of maximal heterosis. The use of F1 bulls on straight bred cows can produce a fair amount of heterosis in calf, but misses out on maternal heterosis due to straight bred cows. F1 bulls are becoming popular for use on crossbred cows of the same breed composition (eg. ½ Simmental and ½ Angus) because this system captures 50% of the heterosis of terminal sire F1 program but is as easy as straight breeding to implement and manage. </strong></p><p><strong></strong></p><p><strong>Keep in mind that when crossbreeding increasing the percentage of one breed in an animal at the expense of others decreases heterosis. For example if you have a F1 Hereford X Angus cow (has 100% individual and maternal heterosis) and mate her to an Angus bull, the calf produced is ¾ Angus and ¼ Hereford . This animal has 50% of the heterosis of its dam."</strong></p></blockquote><p></p>
[QUOTE="bbyou, post: 379181, member: 6338"] ALACOWMAN, The question was "How is using unproven purebred bulls on F1 cows different from using an unproven F1 bull on purebred cows?" Point being, Unproven is Unproven. I asked Robert L. (BOB) Weaber, Ph.D, PAS, Assistant Professor at the University of Missouri Columbia his thoughts on heterosis and crossbreeding. I have included a copy of his response below. [b]"Thanks for you question regarding heterosis and crossbreeding. A frequently cited example of crossbreeding is the use of purebred bulls of one breed on F1 crossbred cows of two other breeds, (e.g. Charolais bulls on Hereford X Angus cows); known as a terminal sire F1 program. This type of system maximizes both maternal heterosis and individual (calf) heterosis and most estimates indicate heterosis in this program is worth about $100 per cow per year. Maternal heterosis (maximized in F1 cows) accounts for about 2/3 of the economic advantage of crossbreeding and, therefore, is important for a successful crossbreeding system. Purebred bulls on purebred cows of a different breed only captures the heterosis expressed by calves produced in this system and only gets 1/3 of the economic advantage of maximal heterosis. The use of F1 bulls on straight bred cows can produce a fair amount of heterosis in calf, but misses out on maternal heterosis due to straight bred cows. F1 bulls are becoming popular for use on crossbred cows of the same breed composition (eg. ½ Simmental and ½ Angus) because this system captures 50% of the heterosis of terminal sire F1 program but is as easy as straight breeding to implement and manage. Keep in mind that when crossbreeding increasing the percentage of one breed in an animal at the expense of others decreases heterosis. For example if you have a F1 Hereford X Angus cow (has 100% individual and maternal heterosis) and mate her to an Angus bull, the calf produced is ¾ Angus and ¼ Hereford . This animal has 50% of the heterosis of its dam."[/b] [/QUOTE]
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