Influencia de sustratos y concentraciones de ácido indol butírico en la propagación vegetativa de Cinchona officinalis L. (quina) en Amazonas, Perú

La investigación tiene por objetivo evaluar la influencia de sustratos y concentraciones de ácido indol butírico (AIB) en la propagación vegetativa de Cinchona officinalis L. (quina) en Amazonas, Perú. Se utilizó un diseño completo al azar con arreglo factorial, de 3A x 4B, dónde factor A: sustratos (arena, arena 50 % + turba 50 % y turba) y factor B: concentración de AIB (0, 1, 2, 3 g.L-1). El trabajo se desarrolló en dos fases, en campo se colectaron ramas ortotrópicas juveniles de árboles ...

Mitochondrial DNA Variation in Peruvian Honey Bee (Apis mellifera L.) Populations Using the tRNAleu-cox2 Intergenic Region

Mitochondrial DNA variations of Peruvian honey bee populations were surveyed by using the tRNAleu-cox2 intergenic region. Only two studies have characterized these populations, indicating the presence of Africanized honey bee colonies in different regions of Peru and varied levels of Africanization, but the current status of its genetic diversity is unknown. A total of 512 honey bee colonies were sampled from three regions to characterize them. Our results revealed the presence of European an...

Novel Complex Unbalanced Dicentric X-Autosome Rearrangement in a Thoroughbred Mare with a Mild Effect on the Phenotype

Complex structural X chromosome abnormalities are rare in humans and animals, and not recurrent. Yet, each case provides a fascinating opportunity to evaluate X chromosome content and functional status in relation to the effect on the phenotype. Here, we report the first equine case of a complex unbalanced X-autosome rearrangement in a healthy but short in stature Thoroughbred mare. Studies of about 200 cells by chromosome banding and FISH revealed an abnormal 2n=63,X,der(X;16) karyotype with...

Participatory breeding in the Peruvian highlands: Opportunities and challenges for promoting conservation and sustainable use of underutilized crops

Underutilized crops tend to harbor high levels of genetic diversity, be maintained on-farm in small-scale farming systems and be relatively neglected by formal research and development strategies, including breeding programs. While high genetic variability allows these crops to adapt to marginal environments, inappropriate management practices and reductions in population sizes in individual farmers’ plots may lead to productivity loss and poor harvests. This situation further limits their cu...