The comparative analysis on diameters of gametic cell stages from diploid and tetraploid Catarina scallop indicated that cell size was significantly larger in tetraploids than in diploids for all oogenic and spermatogenic stages (Table 1), corroborating the microphotograph observations.
Triploid lion-paw scallop (Nodipecten subnodosus Sowerby); growth, gametogenesis, and gametic cell frequencies when grown at a high food availability site.
Triploid lionpaw scallop (Nodipecten subnodosus Sowerby); growth, gametogenesis, and gametic cell
frequencies when grown at a high food availability site.
Gaining to haploids was made possible through application of female and male gametic cells
. Androgenesis (anther or microspores culture) is the most interested method because of its higher efficiency and number of male gametes existing in each bud.
As regards the males, the characterization of the reproductive phases takes into account the presence and predominance (in the gonad) of: spermatogonial proliferation and entrance into meiosis; differentiation of the gametic cells
from spermatids to spermatozoa; and the release and presence of sperm in the gonoduct.