Their odds were improved greatly by siring offspring before the sister or in greater numbers.
However, it is important to recognize that this analysis assumes that post-pollination mechanisms play no significant role in influencing siring success, as they would in a species with heteromorphic incompatibility.
But nobody has said that it is wrong to take the risk of siring or begetting illegitimate children.
He was fifth in the winning sires' list of 1920, siring offspring with combined earnings of 146,000.
Instead, the top ranking males in the groups have an approximately equal share of siring all offspring born to females within the group.
He has proved to be an excellent breeding stallion, siring winners of major races over a wide range of distances.
He was much sought after from the start of his stud career and proved successful, siring the winners of more than 700 races.
Such a decoupling would provide a significant reproductive advantage through increased pollinator visitation and siring success.
