PROBLEMS WITH INDOGAMIC LINES. II • CHANGE OF REGULAR MATING SYSTEM

Abstract

Two approaches for calculating the inbreeding cofficient when one regular svstem of matíng is changed to another, are compared. They are the recurrence equations method and the so called homozygosis coefficient method. The i ncluded recurrence equations were those known for the mating systems: selfing, full·sibing and half· sibing, considered as basic systems. The homozygosis coefficient method is the inbreeding value previously obtained with any system, plus the product of the residual heterozygosis (1-f) times the inbreeding rate of the new system in the fírst generation. lt is demó~strated that the recurrence equations method is a general val id approach to calculate the inbreeding coefficient, whereas the homozygosis coeificient method is valid only when
the last generation of inbreeding is considered.