Apomixis is a unique reproductive process that produces fertile offspring without the combination of sperm and egg cells. This perfectly reproduces maternal DNA, making it possible to fix heterosis during reproduction. Malus shizongensis newly discovered species closely related hupehensis Rehd. After de-male bagging, was found fruit set rate reached 78.7%. Preliminary analysis indicated M. have...

sperms are highly specialized cells for delivering dna from male to the ovum. incredibly, wide degree of diversity in sperm morphology in their basic structures i.e. head, middle piece and tail is found across species. differences in terms of overall size of the sperm, shape and number of sperm produced are also incredible. one of the key for this variations or diversity in sperm may be associa...

Eleven cases of involvement of the genital tract in paracoccidioidomycosis were collected in a retrospective study of the clinical records of 683 patients seen in Porto Alegre, Rio Grande do Sul, Brazil. These cases are herein summarily reported. Eighteen similar cases were gathered in review of the Brazilian literature. Obtained data are discussed.

To improve the quality of frozen material during cryopreservation, scientists apply various effects on cells: mechanical, chemical or physical. In this work we use acoustic-mechanical cells before cryopreservation. As a result studies, optimal parameters impact piezoactuator were selected to defrosted reproductive male sturgeons. The object research was sperm Russian sturgeon. progressive motil...

An investigation of the histological and ultrastructural changes of Sertoli cells during the male reproductive cycle in Piaractus mesopotamicus was made. The results showed that the Sertoli cell development is closely related with germ cell maturation. Therefore, these cells may have some role in germ cell maturation during the reproductive cycle of this species, whether in forming a tissue fra...

BACKGROUND Indomethacin is a member of non-steroidal anti-inflammatory drugs (NSAIDs) commonly used for treatment of gout, arthritis, and other inflammatory conditions. It has been shown to inhibit ovarian prostaglandins synthesis in mammals, birds, fish and reptiles. However, the effects of its chronic administration on male reproductive functions remain largely unknown. Using rat as a model, ...

Relaxin (RLN) belongs to a family of hormones structurally related to insulin and presents a broad spectrum of actions. Humans have three forms of RLN, encoded by three different genes (RLN1, RLN2 and RLN3), but nonprimate vertebrates have only two forms of relaxin (RLN1 and RLN3). RLN1 of these animals is encoded by Rln1, orthologous to the human RLN2 gene, and both genes, Rln1 and human RLN2,...