Phylogenetic relationships among Chilean Sophora species

Peña, Raúl C.; Cassels, Bruce K.

doi:10.1016/s0305-1978(96)00079-8

Cited by 12 publications

(14 citation statements)

References 11 publications

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“…The legume of S. macrocarpa also lacks a wing and is smooth‐walled and the seeds are large, brown and rounded. These characters led Peña & Cassels (1996) and Peña et al . (2000) to suggest that S. macrocarpa was closely related to S. tomentosa and the South American species S. linearifolia and S. rhynchocarpa of sect.…”

Section: Discussionmentioning

confidence: 83%

The relationship of Sophora sect. Edwardsia (Fabaceae) to Sophora tomentosa, the type species of the genus Sophora, observed from DNA sequence data and morphological characters

Heenan

Dawson

Wagstaff

2004

Botanical Journal of the Linnean Society

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Sophora tomentosa , the type species of the genus Sophora , is shown by phylogenetic analyses of rbc L and ITS sequence data to be sister to Sophora sect. Edwardsia . S. tomentosa and most of the species from sect. Edwardsia share hypogeal germination, exstipulate leaves, and terete filaments. These species have buoyant seeds, and are distributed by ocean currents throughout the pantropics ( S. tomentosa ) and around southern temperate oceanic islands (sect. Edwardsia ). S. tomentosa differs from the species of sect. Edwardsia by its frutescent growth habit, terminal elongate inflorescence and smooth-walled legume. S. macrocarpa is unusual in sect. Edwardsia as its leaves have stipules, the filaments are winged, and the legume is smooth-walled.

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Section: Discussionmentioning

confidence: 83%

The relationship of Sophora sect. Edwardsia (Fabaceae) to Sophora tomentosa, the type species of the genus Sophora, observed from DNA sequence data and morphological characters

Heenan

Dawson

Wagstaff

2004

Botanical Journal of the Linnean Society

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“…Two continental species have been sampled for comparison, S. cassioides and S. macrocarpa. The latter had been suggested previously as a possible progenitor of the island taxa (Peña & al., 1993(Peña & al., , 1996(Peña & al., , 2000Ruiz & al., 1999).…”

Section: Tests Of Previous Phylogenetic Hypotheses In the Juan Fernánmentioning

confidence: 99%

“…(Myrtaceae;Landrum 1981;Ruiz & al., 1994), Peperomia Ruiz et Pavon (Piperaceae;Valdebenito & al., 1992b), Robinsonia DC. (Asteraceae;Pacheco & al., 1985;Sanders & al., 1987), Sophora L. (Leguminosae; Peña & al., 1993Peña & al., , 2000Peña & Cassels, 1996;Ruiz & al., 1999), and Wahlenbergia Schrader ex Roth (Campanulaceae; Lammers, 1996). In most of these studies morphological characteristics have been used.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic relationships and genetic divergence among endemic species of Berberis, Gunnera, Myrceugenia and Sophora of the Juan Fernández Islands (Chile) and their continental progenitors based on isozymes and nrITS sequences

Ruíz

Crawford

Stuessy

et al. 2004

TAXON

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Phylogenetic relationships and genetic divergence among congeneric species endemic to the Juan Fernández Islands and their relatives in continental Chile were estimated using percentage of divergence of ITS of nrDNA and genetic identity (Nei) based on allozyme variability. A total of 1151 individuals in 85 populations of 17 species was analyzed belonging to the genera Berberis (four spp.), Gunnera (four spp.), Myrceugenia (five spp.), and Sophora (four spp.). ITS regions 1 and 2 ranged between 442 and 504 bp long. The number of loci resolved differed within each genus and ranged between 5 and 11 (in Gunnera and Sophora, respectively). The new data allowed testing of previous hypotheses of relationship based on morphology and secondary products chemistry. Genetic identity values among insular congeneric species ranged between 0.936 (Gunnera) and 0.670 (Myrceugenia). ITS sequence divergence ranged from 0% (Gunnera and Sophora) to 4.2% (Myrceugenia). These values are within the ranges obtained for insular endemic species in other oceanic archipelagoes. Estimates of time of divergence of endemics from progenitors, based on isozyme data, lie between 188,500 and 2,580,000 years. The oldest island, Masatierra, is approximately 4 million years old and the youngest, Masafuera, 1–2 million years old. Genetic divergence between endemic species of Masafuera and their continental relatives is in general lower than that between endemic species of Masatierra and their putative continental ancestors. Genetic divergence is also greater between continental progenitors and derivative species in Masatierra than between endemic species pairs between Masatierra and Masafuera.

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“…Seem. is well known for its distribution around the Southern Hemisphere oceans, and for this reason is of considerable biogeographical interest (Guppy, 1906; Ridley, 1930; Wace & Dickson, 1965; Sykes & Godley, 1968; Peña et al ., 1993; Peña & Cassels, 1996; Hurr et al ., 1999). This section includes 19 species, with eight of these endemic to New Zealand, two species each in Chile and the Juan Fernandez Islands, and seven other species on islands in the Pacific Ocean and Indian Ocean (de Cordemoy, 1893; Pizarro, 1959; St John, 1985; Wagner, Herbst & Sohmer, 1990; Green, 1994; Heenan, de Lange & Wilton, 2001; Table 1).…”

Section: Introductionmentioning

confidence: 99%

Sophora sect. Edwardsia (Fabaceae): further evidence from nrDNA sequence data of a recent and rapid radiation around the Southern Oceans

Mitchell¹,

Heenan²

2002

Botanical Journal of the Linnean Society

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Phylogenetic relationships are inferred from nuclear ribosomal internal transcribed spacer sequences for species belonging to Sophora sect. Edwardsia from South America, New Zealand, Lord Howe Island, Hawai’i, La Réunion, Easter Island, and Raivavae Island (French Polynesia). Results support the monophyly of sect. Edwardsia, but relationships among the species from this section are poorly resolved due to most species having identical sequences. The origin of Sophora sect. Edwardsia is discussed, as competing hypotheses have proposed the group originated in South America from a North American ancestor, or in the north‐west Pacific. We suggest sect. Edwardsia may have arisen in the north‐west Pacific from a Eurasian ancestor. © The Linnean Society of London, Botanical Journal of the Linnean Society, 2002, 140, 435–441.

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Phylogenetic relationships among Chilean Sophora species

Cited by 12 publications

References 11 publications

The relationship of Sophora sect. Edwardsia (Fabaceae) to Sophora tomentosa, the type species of the genus Sophora, observed from DNA sequence data and morphological characters

The relationship of Sophora sect. Edwardsia (Fabaceae) to Sophora tomentosa, the type species of the genus Sophora, observed from DNA sequence data and morphological characters

Phylogenetic relationships and genetic divergence among endemic species of Berberis, Gunnera, Myrceugenia and Sophora of the Juan Fernández Islands (Chile) and their continental progenitors based on isozymes and nrITS sequences

Sophora sect. Edwardsia (Fabaceae): further evidence from nrDNA sequence data of a recent and rapid radiation around the Southern Oceans

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