Selección de las semillas : Algunos consejos prácticos

La abundancia de las cosechas depende mucho de la naturaleza del suelo, de su preparación mecánica y química y del clima; pero la buena elección del reproductor decide á menudo del éxito del cultivo. Se comprende cada día mas toda la autoridad de este principio: Tal grano, tal producto. Desgraciadamente, se encuentran agricultores poco cuidadosos de sus intereses, que compran sus granos al acaso, sin preocuparse en lo mas mínimo de su origen y cualidades. Se ignora á menudo, que el empleo de una mala semilla puede comprometer toda la cosecha, y que uno de los signos mas carácterísticos del cultivo rutinario, es la indiferencia por la calidad de las semillas. Solamente deben emplearse los granos mas perfectos, en su especie y variedad, es decir, los que han llenado todas sus fases de vegetación en las condiciones mas favorables.Facultad de Ciencias Agrarias y Forestale

Selección de las semillas : Algunos consejos prácticos

La abundancia de las cosechas depende mucho de la naturaleza del suelo, de su preparación mecánica y química y del clima; pero la buena elección del reproductor decide á menudo del éxito del cultivo. Se comprende cada día mas toda la autoridad de este principio: Tal grano, tal producto. Desgraciadamente, se encuentran agricultores poco cuidadosos de sus intereses, que compran sus granos al acaso, sin preocuparse en lo mas mínimo de su origen y cualidades. Se ignora á menudo, que el empleo de una mala semilla puede comprometer toda la cosecha, y que uno de los signos mas carácterísticos del cultivo rutinario, es la indiferencia por la calidad de las semillas. Solamente deben emplearse los granos mas perfectos, en su especie y variedad, es decir, los que han llenado todas sus fases de vegetación en las condiciones mas favorables.Facultad de Ciencias Agrarias y Forestale

Résumé des résultats des enquêtes de base niveau ménage : site de Tougou, Burkina Faso

Ce rapport présente les résultats des enquêtes de base conduites au niveau des ménages de sept (7) villages du site de Tougou (Burkina Faso) dans le cadre du programme de recherche du CGIAR sur le Changement Climatique, l’Agriculture et la Sécurité Alimentaire. L’objectif de ces enquêtes était de de collecter toutes les données et informations sur des indicateurs clés de base concernant les ménages notamment les moyens de subsistance, l’agriculture et la gestion des ressources naturelles, les besoins d’information sur le climat et la gestion des risques, et les pratiques d’atténuation et d’adaptation

Environmental fragility in the Sahel

A companion to the OECD States of Fragility 2022 report, this paper analyses the drivers and effects of climate and environmental risks in the Sahel,focusing on increasing food insecurity, rapid urbanisation and intensified mining. It outlines options for improved policy responses by providers of development co-operation

Proliferation of the water hyacinth (Eichhornia crassipes) on the river Sô (Sô-Ava) in Bénin

Water hyacinth is a plant from America which was imported in Africa as an ornamental plant but because of its proliferation, has become a dangerous aquatic macrophyte. In Benin, it colonizes most courses in continental water. Water hyacinth is present in several areas of the world as an ornamental plant and its infestation can be controlled by several treatments. The objective of this work is to identify them and promote their valuation in order to reduce their dangerousness to the population of aquatic organism as well as their ecosystem. In this regard, a survey was carried out to overcome these problems the people of the town in Sô- Ava and around face every year on the Sô River flows into Lake Nokoue. The coverage of the water hyacinth (Eichhornia crassipes) is a major problem for people living in those areas where the plants rage. This plant prevents the movement of motorized boats, prevents the penetration of oxygen in water, which greatly reduces the number of organism such as fish fry, crocodiles nest and boas.© 2015 International Formulae Group. All rights reserved.Keywords: Eichhornia crassipes, Sô river, aquatic weed, biological contro

Local, Seasonal, and Yearly Condition of Juvenile Greenland Halibut Revealed by the Le Cren Condition Index

An understanding of biological characteristics, such as growth patterns, condition, and energy reserves, is important for better understanding the environmental constraints exerted on fish populations. This is especially true for exploited fish stocks in the current context of climate change. Using biological data collected from 2006 to 2009 during bottom trawl research surveys by Fisheries and Oceans Canada in the estuary and Gulf of St. Lawrence (EGSL) as well as data from 2000 to 2018 in the northwest Atlantic, we sought to improve our knowledge on the seasonal condition of Greenland Halibut Reinhardtius hippoglossoides juveniles and to better understand the divergence in some life history traits between juveniles captured in these two regions. We validated the use of the Le Cren condition index and evaluated its relationship with energetic status in juvenile (20–32-cm TL) Greenland Halibut. In the EGSL, juvenile condition was higher in winter and spring compared to summer and fall. Such variations may result from this species’ pelagic predation activity and prey availability. Juveniles captured in the EGSL during 2016–2017 were larger but had a lower condition index than those captured in the northwest Atlantic, but we found no indication of earlier sexual maturation in the EGSL that could explain the sex ratio differences we observed in catches from these two areas

The BRAF pseudogene functions as a competitive endogenous RNA and induces lymphoma in vivo

SummaryResearch over the past decade has suggested important roles for pseudogenes in physiology and disease. In vitro experiments demonstrated that pseudogenes contribute to cell transformation through several mechanisms. However, in vivo evidence for a causal role of pseudogenes in cancer development is lacking. Here, we report that mice engineered to overexpress either the full-length murine B-Raf pseudogene Braf-rs1 or its pseudo “CDS” or “3′ UTR” develop an aggressive malignancy resembling human diffuse large B cell lymphoma. We show that Braf-rs1 and its human ortholog, BRAFP1, elicit their oncogenic activity, at least in part, as competitive endogenous RNAs (ceRNAs) that elevate BRAF expression and MAPK activation in vitro and in vivo. Notably, we find that transcriptional or genomic aberrations of BRAFP1 occur frequently in multiple human cancers, including B cell lymphomas. Our engineered mouse models demonstrate the oncogenic potential of pseudogenes and indicate that ceRNA-mediated microRNA sequestration may contribute to the development of cancer

Maternal and perinatal health research priorities beyond 2015 : an international survey and prioritization exercise

Background: Maternal mortality has declined by nearly half since 1990, but over a quarter million women still die every year of causes related to pregnancy and childbirth. Maternal-health related targets are falling short of the 2015 Millennium Development Goals and a post-2015 Development Agenda is emerging. In connection with this, setting global research priorities for the next decade is now required. Methods. We adapted the methods of the Child Health and Nutrition Research Initiative (CHNRI) to identify and set global research priorities for maternal and perinatal health for the period 2015 to 2025. Priority research questions were received from various international stakeholders constituting a large reference group, and consolidated into a final list of research questions by a technical working group. Questions on this list were then scored by the reference working group according to five independent and equally weighted criteria. Normalized research priority scores (NRPS) were calculated, and research priority questions were ranked accordingly. Results: A list of 190 priority research questions for improving maternal and perinatal health was scored by 140 stakeholders. Most priority research questions (89%) were concerned with the evaluation of implementation and delivery of existing interventions, with research subthemes frequently concerned with training and/or awareness interventions (11%), and access to interventions and/or services (14%). Twenty-one questions (11%) involved the discovery of new interventions or technologies. Conclusions: Key research priorities in maternal and perinatal health were identified. The resulting ranked list of research questions provides a valuable resource for health research investors, researchers and other stakeholders. We are hopeful that this exercise will inform the post-2015 Development Agenda and assist donors, research-policy decision makers and researchers to invest in research that will ultimately make the most significant difference in the lives of mothers and babies.</p