Introduction Sweetpotato is a vegetatively propagated, highly heterozygous and outcrossing crop. Genetic improvement of sweetpotato complicated because the hexaploid nature The objective this study was to assess genetic compatibility between accessions collected from Niger Nigeria select best parents for next hybridisation block develop new farmer varieties. Materials Methods experiment conduct...

A-optimality of block designs for control versus test comparisons in diallel crosses is investigated. A sufficient condition for designs to be A-optimal is derived. Type S 0 designs are defined and A-optimal type S 0 designs are characterized. A lower bound to the A-efficiency of type S 0 designs is also given. Using the lower bound to A-efficiency, type S 0 designs are shown to yield efficient...

TATISTICAL methods for the analysis of continuous variation have been S developed using second degree statistics such as variance and covariance and successfully applied to crosses between two inbred lines. These have allowed the recognition of the more familiar phenomena associated with Mendelian genetics although they appear in the analyses in a new and less obvious form (MATHER 1949; BATEMAN...