Paternally Inherited Chloroplast Polymorphism in Pinus: Estimation of Diversity and Population Subdivision, and Tests of Disequilibrium with a Maternally Inherited Mitochondrial Polymorphism
AUTOR(ES)
Dong, J.
RESUMO
We have surveyed a chloroplast DNA restriction fragment length polymorphism in 745 individuals, distributed rangewide in eight allopatric natural populations of jack pine (Pinus banksiana Lamb.) and eight allopatric natural populations of lodgepole pine (Pinus contorta Dougl.). The polymorphic region of the chloroplast genome is located near duplicated psbA genes. Fourteen length variants were found in the survey, and these variants distinguished the two species qualitatively. Variant diversities were high in both species (h(es) = 0.43 in jack pine; h(es) = 0.44 in lodgepole pine). Population subdivision was weak within and among lodgepole pine subspecies and in jack pine (i.e., θvalues were less than 0.05). This weak subdivision is compatible with theoretical predictions for paternally inherited markers in wind-pollinated outcrossers, as well as for polymorphisms with high length mutation rates. If these populations are at a drift-migration equilibrium, the chloroplast DNA restriction fragment data and previous mitochondrial frequency data from the same individuals are consistent with gene flow that is differential through seeds and pollen. The new data have permitted the first empirical tests of disequilibrium between maternally and paternally inherited factors. As expected, these tests failed to detect convincing evidence of non-random association between chloroplast and mitochondrial variants.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1205873Documentos Relacionados
- Chloroplast and mitochondrial DNA are paternally inherited in Sequoia sempervirens D. Don Endl
- Alterations of a maternally inherited mitochondrial structural protein in respiratory-deficient strains of Neurospora.
- Effects of Worldwide Population Subdivision on ALDH2 Linkage Disequilibrium
- Angle Class II, subdivision, with agenesis of mandibular second molars and extrusion of maxillary second molars
- Paternally inherited deletion of CSH1 in a patient with Silver-Russell syndrome.