THEORETICAL COMPARISON OF THE EFFICIENCIES OF TWO SELECTION TECHNIQUES IN MASS SELECTION

Abstract

A comparison was made on the theoretical eficiencies
of techniques of Gardner and of Molina in the masal selection method when s subplots with intra subplots environmen­tal homogeneity are considered, each of them containing an individuals and the total number of individuals is b. the basic conclusions were: 1) with the Molina technique in 100% of the cases the best b genotypes of the masal selection plot are selected; 2) when the Gardner technique is used the selection of the best b genotypes is set with a probability of {(b!)(n!) ^s (s n-b)!}/{(a!) [(n-a)!] ^s ( sn)!}; where a=b/s and 3) as the population subject to improvement is more heterogeneous, the use of one or the other technique becomes more important; in these cases the difference between the results of the use of the techniques of Molina or of Gardner tends to be greater tham in those cases when the population is les s heterogeneous.