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A complementary strategy for the conservation of native forest tree species: retrieval and conservation of threatened ecotypes PFB - Pesquisa Florestal Brasileira
Shimizu, Jarbas Yukio.
Deforestation has become rampant in recent years in Brazil and has affected all biomes where manyspecies are threatened to extinction due to destruction natural habitats. Government initiatives to hinder thechain of destruction include two main lines of action: to establish conservation units (parks, reserves andothers); and programs to encourage plantation of native tree species for reclamation of degraded ecosystems, restoration of forests on permanent protection areas (riparian, and steep slope environments), and establishment of “legal reserves” (a mandatory forest reserve on at least 20% of the land area). Conservation units are effectivein conserving natural ecosystems. However, they are of limited value for the conservation of ecotypes, sincetheir...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Inbreeding; Outbreeding; Extinction; Gene conservation Endogamia; Exogamia; Extinção; Conservação; Germoplasma.
Ano: 2010 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/125
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Viability selection creates negative heterozygosity-fitness correlations in female Black Grouse Lyrurus tetrix ArchiMer
Soulsbury, Carl D.; Lebigre, Christophe.
There is widespread interest in the relationship between individual genetic diversity and fitness-related traits (heterozygosity-fitness correlations; HFCs). Most studies have found weak continuous increases of fitness with increasing heterozygosity, while negative HFCs have rarely been reported. Negative HFCs are expected in cases of outbreeding depression, but outbreeding is rare in natural populations. Negative HFCs may also arise through viability selection acting on low heterozygosity individuals at an early stage producing a skew in the heterozygosity distribution. We tested this idea using survival and clutch parameters (egg mass, egg volume, chick mass, clutch size) in female Black Grouse Lyrurus tetrix and carried out simulations to determine how...
Tipo: Text Palavras-chave: Inbreeding; Outbreeding; Neutral loci; Selective mortality; Genetic diversity.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00423/53448/54340.pdf
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