Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Estimating gametic introgression rates in a risk assessment context: a case study with Scots pine relicts
Year:2009
Research Areas
  • Genetics
Information
Abstract
he estimation of recent gene immigration is fundamental to a wide range of evolutionary and conservation studies. In a risk assessment context, gene flow estimation procedures are needed that are both accurate and readily amenable to formal evaluation of statistical uncertainty. However, genetic methods for estimating recent migration rates that are specific and have been thoroughly evaluated are scarce. Here we use an original and straightforward maximum-likelihood method to estimate recent uniparental gametic immigration from non-local plantations into an endangered population of the Iberian relict pine variety Pinus sylvestris var. nevadensis D. H. Christ. Our approach is not intended to ascertain population membership of individuals, but rather to obtain accurate immigration rate estimates with reliable confidence limits. We found very high (~40%) pollen introgression at the seed-crop level into the Scots pine relict, and substantial (10¿15%) male gametic introgression among naturally regenerated recruits. Using numerical simulation, we show that our method yields uniparental gametic immigration estimates that are expected to be virtually unbiased and usually accurate under our sampling conditions. Among four tested methods to estimate the confidence intervals for immigration estimates, the profile-likelihood method was the best, as it outperformed bootstrapping procedures and yielded coverage close to nominal limits under different sample sizes and migration rates. This study presents a method by which researchers can facilitate decision making within a gene flow risk assessment context.
International
Si
JCR
Si
Title
HEREDITY
ISBN
0018-067X
Impact factor JCR
3,823
Impact info
Volume
103
doi:10.1038/hdy.2009.78
Journal number
0
From page
385
To page
393
Month
NOVIEMBRE
Ranking
Participants
  • Participante: Juan José Robledo-Arnuncio (CIFOR-INIA)
  • Participante: Miguel Navascués (CNRS)
  • Autor: Luis Alfonso Gil Sanchez (UPM)
  • Participante: Santiago González-Martínez (CIFOR-INIA)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Genética y Fisiología Forestal
  • Departamento: Silvopascicultura
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