Breeding systems and genetic structure in some Central American pine populations
The breeding systems, genetic structure and identity of populations of Pinus caribaea var. bahamensis, P. caribaea var. hondurensis, P. oocarpa and P. maximinoi were investigated using seed samples from a total of eleven stands in Central America Allozyme variation in embryo and gametophyte tissue of newly-germinated seeds was used to estimate allele frequencies and outcrossing rates and to examine relationships between populations. Estimates of the outcrossing rates varied considerably beteween populations and species, but averaged 80 to 90. Some evidence is presented on the relationships between stands whose taxonomic status is still unclear, particularly with respect to P. patula ssp tecunumannii. In particular, the Yucul and Mountain Pine Ridge stands of P. oocarpa seem to have affinities, but the allozyme evidence is equivocal on the inclusion of the Rafael stand in P. patula ssp. tecunumanii
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1989
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| Subjects: | GENETICA, PINUS CARIBAEA, PINUS OOCARPA, PINUS PATULA, AMERICA CENTRAL, |
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| Summary: | The breeding systems, genetic structure and identity of populations of Pinus caribaea var. bahamensis, P. caribaea var. hondurensis, P. oocarpa and P. maximinoi were investigated using seed samples from a total of eleven stands in Central America Allozyme variation in embryo and gametophyte tissue of newly-germinated seeds was used to estimate allele frequencies and outcrossing rates and to examine relationships between populations. Estimates of the outcrossing rates varied considerably beteween populations and species, but averaged 80 to 90. Some evidence is presented on the relationships between stands whose taxonomic status is still unclear, particularly with respect to P. patula ssp tecunumannii. In particular, the Yucul and Mountain Pine Ridge stands of P. oocarpa seem to have affinities, but the allozyme evidence is equivocal on the inclusion of the Rafael stand in P. patula ssp. tecunumanii |
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