Here we have used a mass selection approach to assess the selective (evolutionary) impact of exposure to Plasmodium-infected blood and infection on mosquito permissiveness to parasite infection and global gene expression.
For this purpose, family selection was carried out first (out of the four families obtained simultaneously, the two which appeared to be best were selected); then within the best families, the mass selection of champions was made (in the second year of life).
With a selected proportion of 5%, for example, response to mass selection is reduced by only 7% when h = 0.10 but by 21% when h = 0.50 (Table 1).
A modern refinement of mass selection is to harvest the best plants separately and to grow and compare their progenies.
Mass selection, with or without progeny test, is perhaps the simplest and least expensive of plant-breeding procedures.
To evaluate the potential of mass selection for fillet traits, however, genetic parameters are required.
Mass selection has long been a major method of breeding cross-pollinated species, especially in the economically less important species.
The potential of mass selection aiming to improve fillet weight was evaluated by a number of selection indexes.
Employing individual or mass selection breeding should be successful in developing high-productivity lines in this population.
PPB involved mass selection by farmers from crossing various combinations of local and new white- and yellow-grained varieties.
The most important methods of breeding cross-pollinated species are (1) mass selection; (2) development of hybrid varieties; and (3) development of synthetic varieties.
