Artículos de revistas
When Hybrids Are Not Hybrids: A Case Study Of A Putative Hybrid Zone Between Cattleya Coccinea And C.brevipedunculata (orchidaceae)
Registro en:
Botanical Journal Of The Linnean Society. Wiley-blackwell, v. 181, p. 621 - 639, 2016.
0024-4074
1095-8339
WOS:000379937500005
10.1111/boj.12437
Autor
Leal
Barbara S. S.; Chaves
Cleber J. N.; Koehler
Samantha; Borba
Eduardo L.
Institución
Resumen
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Cattleya coccinea and C.brevipedunculata (Orchidaceae) are closely related species distinguished primarily by geographical distribution, vegetative morphology and flowering period. Both species inhabit high-elevation regions in south-eastern Brazil, but are traditionally associated with different habitats, located in cloudy forests and campos rupestres (rocky fields), respectively. We used morphometrics and genetic variation of microsatellite markers to test the occurrence of a hybrid zone between these species located in Parque Estadual do Ibitipoca (PEI), Brazil. Morphological data reveal a continuum of variation between the putative taxa, influenced mainly by characters of leaf, pseudobulb and peduncle. However, genetic data do not support the occurrence of hybridization and introgression in PEI, showing that it is a pure population of C.brevipedunculata. Differences in vegetative characters among individuals from cloudy forests and campos rupestres suggest that morphological variation may be related to phenotypic plasticity in response to environmental light fluctuations, an unknown situation for this species. These results highlight the inconsistency of morphology for the identification of hybrids and the role of vegetative characters as a possible complicating factor for the taxonomy of these species, as they are subject to environmental influence. 181 4 621 639 CNPq [PQ 1B] Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)