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Titolo:
Genetic diversity in Mesoamerican populations of mahogany (Swietenia macrophylla), assessed using RAPDs
Autore:
Gillies, ACM; Navarro, C; Lowe, AJ; Newton, AC; Hernandez, M; Wilson, J; Cornelius, JP;
Indirizzi:
Inst Terr Ecol, Penicuik EH26 0QB, Midlothian, Scotland Inst Terr Ecol Penicuik Midlothian Scotland EH26 0QB Midlothian, Scotland Trop Agr Ctr Res & Higher Educ, CATIE, Turrialba 7170, Costa Rica Trop AgrCtr Res & Higher Educ Turrialba Costa Rica 7170 170, Costa Rica Univ Edinburgh, Inst Ecol & Resource Management, Edinburgh EH9 3JU, Midlothian, Scotland Univ Edinburgh Edinburgh Midlothian Scotland EH9 3JU Midlothian, Scotland
Titolo Testata:
HEREDITY
, volume: 83, anno: 1999,
parte:, 6
pagine: 722 - 732
SICI:
0018-067X(199912)83:<722:GDIMPO>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERSPECIFIC COMPARISONS; NATURAL-POPULATIONS; FOREST; TREE; MANAGEMENT; ALLOZYME; KING;
Keywords:
conservation; genetic diversity; logging; RAPDs; Swietenia;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Gillies, ACM Univ St Andrews, Sch Environm & Evolutionary Biol, Sir HaroldMitchell Bldg, St Andrews KY16 9TH, Fife, Scotland Univ St Andrews Sir Harold Mitchell Bldg St Andrews Fife Scotland KY16 9TH
Citazione:
A.C.M. Gillies et al., "Genetic diversity in Mesoamerican populations of mahogany (Swietenia macrophylla), assessed using RAPDs", HEREDITY, 83, 1999, pp. 722-732

Abstract

Swietenia macrophylla King, a timber species native to tropical America, is threatened by selective logging and deforestation. To quantify genetic diversity within the species and monitor the impact of selective logging, populations were sampled across Mesoamerica, from Mexico to Panama, and analysed for RAPD DNA variation. Ten decamer primers generated 102 polymorphic RAPD bands and pairwise distances were calculated between populations according to Nei, then used to construct a radial neighbour-joining dendrogram andexamine intra- and interpopulation variance coefficients, by analysis of molecular variation (AMOVA). Populations fi om Mexico clustered closely together in the dendrogram and were distinct from the rest of the populations. Those from Belize also clustered closely together. Populations from Panama,Guatemala, Costa Rica, Nicaragua and Honduras, however, did not cluster closely by country but were more widely scattered throughout the dendrogram. This result was also reflected by an autocorrelation analysis of genetic and geographical distance. Genetic diversity estimates indicated that 80% of detected variation was maintained within populations and regression analysis demonstrated that logging significantly decreased population diversity (P=0.034). This study represents one of the most wide-ranging surveys of molecular variation within a tropical tree species to date. It offers practicalinformation for the future conservation of mahogany and highlights some factors that may have influenced the partitioning of genetic diversity in this species across Mesoamerica.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/06/20 alle ore 09:31:24