Inhibition of larval growth of Ceratitis capitata Wied. by addition of antimetabolites to the larval diet.

A comparative study has been earried out in order to investigate the effects of cytarabine and ftorafur on the larval development and sex segregation of the Mediterranean fruit fly.Peer reviewe

Genealogical data of Boer and Nubian goats in Mexico

The pedigree file of the Boer and Nubian goat breeds in Mexico was constructed using the national database provided by the Asociación Mexicana de Criadores de Ganado Caprino de Registro. Field technicians routinely updated the goat national database by recording information from flocks participating in the performance-recording system. Information on animal identification number, parents, birth date, sex, breed, and farm of origin were used to undertake pedigree analyses using the ENDOG program (version 4.8). This paper presents a pedigree data file, tables and figures of characteristics of pedigree data, pedigree analyses, pedigree integrity, effective population size and genetic conservation index. The data can be used to estimate other population parameters, to monitor the genetic diversity of the Boer and Nubian goat breeds in Mexico, and also to design balanced breeding programs, maintaining genetic variation at reasonable levels and maximizing genetic progress in these populations.202

Comparative radiosensitivity of Medfly cells and embryos.

This research is dealing with the effect of 6O Co gamma radiation on cultured "In vitro" cells and on embryos at different developmental stages, of Ceratitis capitata Wiedemann. The parameters ana1yzed for both the cells and the embryos were growrh, survival and mortality rates. The immediate and late effects of irradiation were also studied at the level of egg hatching, larval life cycle, emergence of adults and their fertility. A particular result that became evident in the cormparison of the radiosensitivity was that the ceIls "in vitro" had a greater radioresistance than the very young embryos by a factor of 3, but the ceIls had less resistance by a factor of 8.5 when compared with the developed embryos. In general, with an increase in dose there was an increase in damage; even at 1200 rad a prolonged arrest was found in the growth of the cell population, and with 2400 rad it was found in the developmenr of 24 h old embryos. Confronting embryos of different ages, it was noted that the same quantitative effect was obtained with doses proportional to the age of the embryos: the same mortality effect in 30 min old embryos irradiated with 300 rad as in those 24 h old treated with 4800 rad was observed. The results obtained are presented and discussed.Peer reviewe