Hybridization and Speciation in the Pacific Coast Irises

Lenz, Lee W.

doi:10.5642/aliso.19590402.03

Cited by 21 publications

(28 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Iris, Pinus, and Quercus are but a few of the western genera, besides Diplacu.r, where hybridization has blurred the boundaries between species. As has been pointed out by Tucker (1952a) for the Quercus dumo.ra complex, Alva and V. Grant (1956Grant ( , 1960 and V. Grant (1957) for the Cilia temtiftora group, by Lenz (1958Lenz ( , 1959 for the Californicae series in Iris., and by others, to regard all intergrading entities in such groups as subspecies would obscure obvious morphological differences and confuse rather than clarify their systematics. The use of Lotsy' s term, syngameon, for a group of hybridizing species was proposed by V. Grant (1957).…”

Section: Variation and Its Implied Significancementioning

confidence: 79%

“…Early records of artificial interspecific hybrids were published by Lemaire ( 1863) and Verschaffelt ( 1863). More recent successes were reported by Adele Grant (1924), McMinn (1951, Vickery (1956), and Lenz (1956). McMinn's breeding program was quite extensive and involved crossing, selfing, and backcrossing all species.…”

Section: Reproductionmentioning

confidence: 81%

“…The integrity of the interfertile Salvia apiana and S. mellifera, as demonstrated by Epling ( 1947) and later by , results, at least in part, from their preferential selection by different habitats. Lenz (1958Lenz ( , 1959) discovered ecological differences to be a basic cause of species separation in the California series of Iris. Muller (1952), Tucker (1952a, b;Tucker and Muller, 1958;Tucker and Haskell, 1960) and other students of Quercus found ecological control of hybridization to be the principal force maintaining species distinctions in the western oaks.…”

Section: Variation and Its Implied Significancementioning

confidence: 99%

See 2 more Smart Citations

Variation and Hybridization in Southern California Populations of Diplacus (Scrophulariaceae)

Beeks¹

1962

aliso

View full text Add to dashboard Cite

Section: Variation and Its Implied Significancementioning

confidence: 79%

Section: Reproductionmentioning

confidence: 81%

Section: Variation and Its Implied Significancementioning

confidence: 99%

See 1 more Smart Citation

Variation and Hybridization in Southern California Populations of Diplacus (Scrophulariaceae)

Beeks¹

1962

aliso

View full text Add to dashboard Cite

“…The series has been recognized as a unique and natural grouping of species since Dykes' (1913) comprehensive monograph on the genus Iris. Three species within this group: IPis douglasiana,_ IPis innominata and Iris thompsonii were investigated by Lenz (1958) in his revision of the Pacific Coast species and again in his papers on hybridization and speciation in the group (1959a). Clarkson (1958Clarkson ( , 1962 3 green to bluish and almost black in some cases.…”

mentioning

confidence: 99%

“…Five Oregon species were recognized by Lenz (1958Lenz ( , 1959 in his revision of the series Californicae and subsequent paper on hybridization and specation in the series. He recognized I. douglasiana and I. innominata but retained I. thompsonii within the species I. innominata, considering it a hybrid between the two species and in some populations as a color form of I. innominata.…”

mentioning

confidence: 99%

A population study of three iris (iridaceae) species native to the Siskiyou Mountains in southwestern Oregon and adjacent California

Wilson¹

2000

View full text Add to dashboard Cite

The series Californicaeis a natural grouping of Iris species native to Oregon, Washington and California. Natural and experimental hybridization is characteristic of the series which has led to confusing taxonomies for some species. Populations of species belonging to this series and found on the northwestern slopes of the Siskiyou Mountains cf southwestern Oregon and adjacent California were investigated. Methods used 2 were numerical classification techniques for morphological characters including both discriminant and K-means cluster analyses and a chemotaxonomi c analysis of flavonoid pigments using thin layer chromatography.The thirteen populations were found to represent three species: Iris doug'lasiana, Irais innominata, and Ir>is thompsonii. This study does not support the current taxonomy for I. thompsonii .which places it under I. innominata as a color form or in some populations as a hybrid between the species and I. dougZasiana. Differences were found in the intraspecific variation of the three species. I. innominata was a homeogeneous species and I. thompsonii was quite variable over its range. These differences may well reflect the unique character of this area. Although hybridization is possible between sympatric populations over the entire study area, mechanisms such as habitat preference and blooming time may well reduce gene flow. Two populations were found which may represent current hybridizations.

show abstract

Topology of syngameons

Boecklen

2017

Ecology and Evolution

View full text Add to dashboard Cite

Syngameons are sets of species linked by interspecific hybridization. Common observations regarding the structure of syngameons are that hybridization propensity is not uniform across species and that patterns of hybridization are dominated by a few species. I use computer simulations to test these claims in naturally occurring syngameons selected from the literature and from personal observation. Natural syngameons, especially those involving plants, typically exhibit nonrandom structure: The first three order statistics for the number of hybrid partners and the variance in the number of hybrid partners are larger than chance alone would predict. The structure of two insect syngameons examined is not significantly different from random. To test a hypothesis that variation in hybridization propensity across species in natural syngameons is simply an artifact of hybridization opportunity, I examine the structure of four artificial syngameons (fertility relationships) produced by full diallel crosses. Three of four artificial syngameons exhibit nonrandom structure, as the observed variation in number of successful crosses is larger than chance alone would predict. In general, there are no significant results involving the order statistics. Finally, I discuss biogeographic, ecological, and phylogenetic hypotheses for variation in hybridization propensity across species in natural syngameons.

show abstract

Hybridization and Speciation in the Pacific Coast Irises

Cited by 21 publications

References 6 publications

Variation and Hybridization in Southern California Populations of Diplacus (Scrophulariaceae)

Variation and Hybridization in Southern California Populations of Diplacus (Scrophulariaceae)

A population study of three iris (iridaceae) species native to the Siskiyou Mountains in southwestern Oregon and adjacent California

Topology of syngameons

Contact Info

Product

Resources

About