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| Bierne, Nicolas; Eyre Walker, A. |
| A strong negative correlation between the rate of amino-acid substitution and codon usage bias in Drosophila has been attributed to interference between positive selection at nonsynonymous sites and weak selection on codon usage. To further explore this possibility we have investigated polymorphism and divergence at three kinds of sites: synonymous, nonsynonymous and intronic in relation to codon bias in D. melanogaster and D. simulans. We confirmed that protein evolution is one of the main explicative parameters for interlocus codon bias variation (r(2) similar to 40%). However, intron or synonymous diversities, which could have been expected to be good indicators of local interference [here defined as the additional increase of drift due to selection on... |
| Tipo: Text |
Palavras-chave: Substitution rate; Selective constraints; Linkage; Hill Robertson interference; GC content; Drosophila; Diversity; Codon usage. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-4221.pdf |
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| Jaffe, Judson; Stavins, Robert N.. |
| Cap-and-trade systems have emerged as the preferred national and regional instrument for reducing emissions of greenhouse gases throughout the industrialized world, and the Clean Development Mechanism — an international emission-reduction-credit system — has developed a substantial constituency, despite some concerns about its performance. Because linkage between tradable permit systems can reduce compliance costs and improve market liquidity, there is great interest in linking cap-and-trade systems to each other, as well as to the CDM and other credit systems. We examine the benefits and concerns associated with various types of linkages, and analyze the near-term and long-term role that linkage may play in a future international climate policy... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Linkage; Cap-and-Trade; Tradable Permits; Global Climate Change; Environmental Economics and Policy; F500; Q200; Q400; Q500. |
| Ano: 2008 |
URL: http://purl.umn.edu/46624 |
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| Rodrigues,Lucas Mateus Rivero; Braghini,Masako Toma; Guerreiro Filho,Oliveiro. |
| ABSTRACT Coffee resistance to Pseudomonas syringae pv. garcae has been associated to pleiotropic effect of SH1 allele, present in coffee plants resistant to certain races of Hemileia vastatrix, the causal agent of leaf rust, or genetic linkage between resistance alleles to both pathogens. To validate this hypothesis, 63 coffee plants in F2 generation were evaluated for resistance to 2 isolates of H. vastatrix carriers of alleles, respectively, v2, v5 (isolate I/2015) and v1; v2; v5 (isolate II/2015) with the objective to confirm presence of SH1 allele in resistant plants to isolate I/2015. The same coffee plants were evaluated for resistance to a mixture of P. syringae pv. garcae strains highly pathogenic to coffee. Results showed that, among F2 coffee... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica L.; Resistant cultivars; Pseudomonas syringae pv. garcae; Linkage; Hemileia vastatrix; Pleiotropic effect. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000200209 |
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