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| Registros recuperados: 212 | |
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| SILVA, C. M. M. S.; SILVA, A. S.; MAIA, A. de H. N.. |
| A adaptabilidade de forrageiras, em relacao aos parametros agua, solo e planta, foi avaliada na Embrapa Tropico Semi-Arido, por meio de quatro gramineas forrageiras, estabelecidas em parcelas de 4 x 8m. Determinou-se a variabilidade espaco-temporal da temperatura e o teor de agua disponivel no solo, em diferentes profundidades. A avaliacao da estabilidade da producao de gramineas foi determinada atraves dos indices de umidade e de sustentabilidade. As maximas temperaturas do solo (36oC), a profundidade de 0-15 cm, coincidiram com o menor indice de umidade no mesmo, nao afetando a produtividade das especies mais adaptadas as condicoes adversas de temperatura e umidade. Atraves do indice de umidade, C. gayana cv. Masaba apresentou grande variabilidade de... |
| Tipo: Folhetos |
Palavras-chave: Adaptação; Adaptation; Humidity index; Humity of soil; Índice de sustentabildiade; Indice de umidade; Pernambuco; Plant soil relation; Regiao semiárida; Sub Medio Sao Francisco; Sustentabilidade; Biloela; Cenchrus ciliares; Gramínea forrageira; Aclimatação; Capim; Capim de Rhodes; Capim Urochloa; Temperatura do solo; Umidade do solo; Urochloa mosambicensis; Relação solo-planta; Sistema radicular; Forage grasses; Plant adaptation; Semiarid zones. |
| Ano: 1999 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/963786 |
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| SPEHAR, C. R.; TEIXEIRA, D. L.. |
| RESUMO: O objetivo deste trabalho foi caracterizar e avaliar 48 acessos de três espécies de amaranto (Amaranthus caudatus L., A . cruentus L. e A . hypochondriacus L.) para cultivo na entressafra em áreas de Cerrado do Brasil Central. Realizou-se seleção preliminar para sete descritores, em casa de vegetação. Os genótipos promissores foram selecionados para teste no campo, em delineamento experimental de blocos ao acaso com três repetições. O material utilizado foi o que apresentou características agronômicas desejáveis, tais como sementes claras, ausência de espinhos, crescimento e inflorescência eretos. Os ensaios foram realizados em Planaltina, DF, na entressafra, com irrigação, por dois anos. Em geral, os acessos florescem 45 dias após a emergência, e... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Amaranto; Adaptação; Zero tillage; Phenotypes; Adaptation; Agronomic characters.; Amaranthus Cruentus; Características Agronômicas; Cerrado; Fenótipo; Plantio Direto.; Amaranthus caudatus; Amaranthus hypochondriacus.. |
| Ano: 2004 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569095 |
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| VALLE, C. B. do; EUCLIDES, V. P. B.; PEREIRA, J. M.; VALÉRIO, J. R.; PAGLIARINI, M. S.; MACEDO, M. C. M.; LEITE, G. G.; LOURENÇO, A. J.; FERNANDES, C. D.; DIAS FILHO, M. B.; LEMPP, B.; POTT, A.; SOUZA, M. A. de. |
| A cultivar Xaraés (Brachiaria brizantha), coletada em Burundi. África, foi liberada pela Embrapa em 2003 após 15 anos de avaliações. É uma planta cespitosa, de 1,5 m de altura, folha lanceolada e longa, com poucos pêlos e de coloração verde-escura. Os colmos são finos e radicantes nos nós, e as inflorescência são grandes, como espiguetas em uma só fileira. A cultivar Xaraés é apomítica e penteploíde, com 45 cromossomos. Irregularidades na divisão meiótica reduzem a validade do pólen para, aproximadamente, 79%. Seus principais atributos possitivos são a alta produtividade, especialmente de folhas, a rápida rebrota e o florescimento tardio, prolongado o período de pastejo até o período seco. Além disso, apresenta bom valor nutritivo e alta capacidade de... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Xaraés; Característica agronômica; Mata Atlântica; Brasil; Agronomic characters; Adaptation; Mixed pastures; Brazilian savannas.; Aclimatação; Brachiaria Brizantha; Citogenética; Cerrado; Diversificação de Cultura; Pastagem Cultivada; Plantio; Valor Nutritivo.; Brazil; Cytogenetics; Nutritive value; Planting; Sown pastures.. |
| Ano: 2004 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/326133 |
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| TURCO, S. H. N.. |
| Os trabalhos com capim buffel efetuados pela Embrapa Semi-Arido e outras instituicoes, comprovam a possibilidade de incrementos de peso vivo em bovinos da ordem de 100 a 150 kg por cabeca/ano, sendo atualmente considerada um dos mais importantes recursos forrageiros para a regiao semi-arida. Todavia, mesmo com esses ganhos, no periodo seco, pode haver perdas, devido a queda dos teores de proteina e energia do capim. Entretanto, sabendo-se que a qualidade da dieta selecionadas pelos ruminantes em pastejo, pode flutuar com o "status" fenologico das plantas forrageiras, a suplementacao energetica e/ou proteica de baixo custo, via mistura multiplas, pode se tornar uma pratica e uma excelente alternativa na busca do aumento da eficiencia produtiva dos animais,... |
| Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) |
Palavras-chave: Raca Sindi; Comportamento fisiologico; Desempenho; Adaptacao; Regiao semi-arida; Behaviour; Adaptation; Semiarid region; Bovino; Ecologia Animal; Performance; Animal ecology; Cattle. |
| Ano: 1999 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133623 |
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| COSTA, N. D.; RESENDE, G. M. de; DIAS, R. de C. S.. |
| Objetivando-se indicar cultivares de cebola mais produtivas e de melhor qualidade de bulbos para a regiao semi-arida, conduziu-se um ensaio no Projeto Bebedouro, Petrolina-PE, de abril a agosto de 1997. O delineamento experimental foi de blocos ao acaso com quatro repeticoes e as seguintes cultivares: Granex-429, Texas-Grano-PRR, Brownsville, Houston, Texas Grano-502, Texas Grano-438, Conquista, Composto IPA-6, Belem IPA-9, Franciscana IPA-10, Valeouro IPA-11, Alfa Tropical (CNPH-6179), CNPH-5898, CNPH-6074, CNPH-6040, CNPH-6067, Bola P. EMPASC, XP-1, XP-2 e Crioula Mercosul. A produtividade de bulbos comerciais variou de 21,41 a 61,78 t/ha, destacando-se as cultivares Texas Grano-PRR (61,78t/ha), Granex-429 (58,28 t/ha), Texas Grano-438 (56,97 t/ha),... |
| Tipo: Outras publicações técnicas (INFOTECA-E) |
Palavras-chave: Cultivo; Classificacao; Cultivation; Adaptation; Aclimatação; Allium Cepa; Bulbo; Cebola; Produtividade; Variedade; Bulbs; Classification; Onions; Yields. |
| Ano: 2000 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133945 |
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| Muir, Anna P.; Dubois, Stanislas; Ross, Rebecca E.; Firth, Louise B.; Knights, Antony M.; Lima, Fernando P.; Seabra, Rui; Corre, Erwan; Le Corguillé, Gildas; Nunes, Flavia. |
| ackground Under the threat of climate change populations can disperse, acclimatise or evolve in order to avoid fitness loss. In light of this, it is important to understand neutral gene flow patterns as a measure of dispersal potential, but also adaptive genetic variation as a measure of evolutionary potential. In order to assess genetic variation and how this relates to environment in the honeycomb worm (Sabellaria alveolata (L.)), a reef-building polychaete that supports high biodiversity, we carried out RAD sequencing using individuals from along its complete latitudinal range. Patterns of neutral population genetic structure were compared to larval dispersal as predicted by ocean circulation modelling, and outlier analyses and genotype-environment... |
| Tipo: Text |
Palavras-chave: RADseq; Ocean circulation modelling; Adaptation; Marine invertebrate; Larval dispersal. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00643/75538/76445.pdf |
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| Fallet, Manon; Luquet, Emilien; David, Patrice; Cosseau, Céline. |
| Recent insights in evolutionary biology have shed light on epigenetic variation that interacts with genetic variation to convey heritable information. An important characteristic of epigenetic changes is that they can be produced in response to environmental cues and passed on to later generations, potentially facilitating later genetic adaptation. While our understanding of epigenetic mechanisms in vertebrates is rapidly growing, our knowledge about invertebrates remains lower, or is restricted to model organisms. Mollusks in particular, are a large group of invertebrates, with several species important for ecosystem function, human economy and health. In this review, we attempt to summarize the literature on epigenetic and intergenerational studies in... |
| Tipo: Text |
Palavras-chave: Mollusk; Epigenetic; Intergenerational effect; Phenotypic plasticity; Adaptation. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00590/70163/68170.pdf |
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| Kengne, Pierre; Charmantier, Guy; Blondeau‐bidet, Eva; Costantini, Carlo; Ayala, Diego. |
| Salinity tolerance is an important trait that governs the ecology of disease‐vector mosquitoes by determining their choice of larval habitat, and consequently their ecological and geographical distribution. Here, we used laboratory strains to determine the osmotic responses of larvae of obligate freshwater disease‐vector mosquitoes (Aedes aegypti, Aedes albopictus, Anopheles coluzzii, An. gambiae, Culex pipiens, and Cx. quinquefasciatus) and assessed their relationship with salinity tolerance. First, we analyzed the acute dose–mortality response of fourth‐instar larvae to salinity; then, we measured their hemolymph osmolality after 24‐h exposure to varying salinities. We found that Ae. albopictus was the most tolerant species, followed by An. coluzzii,... |
| Tipo: Text |
Palavras-chave: Adaptation; Aedes; Anopheles; Culex; Hemolymph osmolality; Lethal concentration; Mosquitoes; Osmoregulation; Salinity tolerance. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00585/69744/67634.pdf |
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| Plucain, Jessica; Suau, Antonia; Cruveiller, Stephane; Medigue, Claudine; Schneider, Dominique; Le Gac, Mickael. |
| Background The impact of historical contingency, i.e. the past evolutionary history of a population, on further adaptation is mostly unknown at both the phenotypic and genomic levels. We addressed this question using a two-step evolution experiment. First, replicate populations of Escherichia coli were propagated in four different environmental conditions for 1000 generations. Then, all replicate populations were transferred and propagated for further 1000 generations to a single new environment. Results Using this two-step experimental evolution strategy, we investigated, at both the phenotypic and genomic levels, whether and how adaptation in the initial historical environments impacted evolutionary trajectories in a new environment. We showed that... |
| Tipo: Text |
Palavras-chave: Experimental evolution; Escherichia coli; Adaptation; Historical contingency; Epistasis. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00333/44447/44118.pdf |
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| Destoumieux-garzón, Delphine; Bonnet, P.; Teplitsky, C.; Criscuolo, F.; Henry, P.-y.; Mazurais, David; Prunet, P.; Salvat, Gilles; Usseglio-polatera, P.; Verrier, E.; Friggens, N.c.. |
| Wild and farmed animals are key elements of natural and managed ecosystems that deliver functions such as pollination, pest control and nutrient cycling within the broader roles they play in contributing to biodiversity and to every category of ecosystem services. They are subjected to global changes with a profound impact on the natural range and viability of animal species, the emergence and spatial distribution of pathogens, land use, ecosystem services and farming sustainability. We urgently need to improve our understanding of how animal populations can respond adaptively and therefore sustainably to these new selective pressures. In this context, we explored the common points between animal production science and animal ecology to identify promising... |
| Tipo: Text |
Palavras-chave: Adaptation; Agroecosystem; Livestock sustainability; Resilience; Zoonotic disease. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00663/77509/79273.pdf |
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| Leseur, Floriane. |
| With the constant rising of the human population, it is essential to assess and manage the exploitation of the marine species for human consumption such as the anchovy of Bay of Biscay. Thanks to the PELGAS annual surveys, stocks of each species are estimated (biomass, repartition) and studies are undertaken to improve our knowledge about these species. Allozymic studies realized on the anchovy allowed to find a correlation between 2 alleles of the locus IDH and the habitat (depth). This allozyme has a key role in Krebs’ cycle,being speed limiting.. It enables to tolerate variations of temperature and dissolved oxygen. It would be interesting to do new research on variations in the anchovy’s environment and its migrations. |
| Tipo: Text |
Palavras-chave: Anchois; Golfe de Gascogne; Allozyme; Locus; Allèle; Adaptation; Anchovy; Bay of Biscay; Allozyme; Locus; Allele; Adaptation. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00342/45336/44798.pdf |
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| Sussarellu, Rossana; Huvet, Arnaud; Lapegue, Sylvie; Quillen, Virgile; Lelong, Christophe; Cornette, Florence; Jensen, Lasse Fast; Bierne, Nicolas; Boudry, Pierre. |
| Background Originating from Northeast Asia, the Pacific oyster Crassostrea gigas has been introduced into a large number of countries for aquaculture purpose. Following introduction, the Pacific oyster has turned into an invasive species in an increasing number of coastal areas, notably recently in Northern Europe. Methods To explore potential adaptation of reproductive traits in populations with different histories, we set up a common garden experiment based on the comparison of progenies from two populations of Pacific oyster sampled in France and Denmark and their hybrids. Sex ratio, condition index and microarray gene expression in gonads, were analyzed in each progeny (n = 60). Results A female-biased sex-ratio and a higher condition index were... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Adaptation; Invasiveness; Fertility; Sex-ratio; Transcriptome; Microarray. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00287/39829/38343.pdf |
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| Soyez, Claude. |
| Les résultats exposés dans ce rapport apportent des informations sur la Capacité Osmorégulatrice des crevettes d'élevage, Penaeus stylirostris et P. vannamei, face à un abaissement de l'oxygénation ambiante. Ces résultats s'appliquent à des juvéniles placés dans des conditions optimum en laboratoire mais à niveau métabolique bas : animaux à jeun, en stade d' intermue C, adaptés après dissipation du stress induit par la pêche et le transfert dans un nouvel environnement. Les mesures ont confirmé que les crevettes présentent une zone d'indépendance osmorégulatrice au-dessus de 3 mg O2.11 et· une zone de dépendance osmorégulatrice qui commence au-dessous de cette valeur. Ces résultats vont également dans le sens de ceux obtenus sur les tests de croissance et... |
| Tipo: Text |
Palavras-chave: Aquaculture tropicale; Pénéides; Respiration; Hypoxie; Stress; Osmorégulatio; Adaptation. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00425/53682/54526.pdf |
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| Comte, Adrien; Pendleton, Linwood H.; ,. |
| Coral reef ecosystems and the people who depend on them are increasingly exposed to the adverse effects of global environmental change (GEC), including increases in sea-surface temperature and ocean acidification. Managers and decision-makers need a better understanding of the options available for action in the face of these changes. We refine a typology of actions developed by Gattuso et al. (2015) that could serve in prioritizing strategies to deal with the impacts of GEC on reefs and people. Using the typology we refined, we investigate the scientific effort devoted to four types of management strategies: mitigate, protect, repair, adapt that we tie to the components of the chain of impact they affect: ecological vulnerability or social vulnerability.... |
| Tipo: Text |
Palavras-chave: Coral reefs; Climate change; Ocean acidification; Management; Adaptation. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00418/52917/53872.pdf |
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| Registros recuperados: 212 | |
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