Floral scent in natural hybrids of Ipomopsis (Polemoniaceae) and their parental species

The utilization of elm leaf flavonoids as biochemical markers for the identification of artificial and natural hybrids of elm species is discussed. Two to 11 individuals from controlled crosses of Ulmuscarpinifolia Gled., Ulmuspumila L., Ulmusparvifolia Jacq., and Ulmusjaponica (R.) Sarg. were examined. Five to seven individuals from each parental species, and a number of putative hybrids between U. carpinifolia and U. pumila that naturally occur in central and northern Italy, were also examined. Quantitative data on leaf flavonoid glycosides were obtained by means of high-performance thin layer chromatography and examined by multivariate discriminant analysis. The results show that it is possible to identify the hybrid obtained between these species even if the parents are unknown, provided a number of individuals of the parental species are examined; therefore, it is also possible to certify putative hybrids. The higher variability of the flavonoid glycoside data of U. carpinifolia and U. pumila and the probable presence of F2 generation individuals make the certification of natural hybrids between these two species in some cases difficult or even impossible.

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On the Romanian endemic species of Salvia (Lamiaceae) and its natural hybrids: nomenclatural and taxonomic aspects

Phytotaxa ◽

10.11646/phytotaxa.434.3.5 ◽

2020 ◽

Vol 434 (3) ◽

pp. 270-280

Author(s):

VIKTOR O. NACHYCHKO ◽

YEVHEN V. SOSNOVSKY

Keyword(s):

Endemic Species ◽

Parental Species ◽

Natural Habitats ◽

Diagnostic Features ◽

Natural Hybrids ◽

Southern Carpathians

Salvia transsylvanica is regarded to be endemic to the Transylvanian Basin, Eastern and Southern Carpathians in Romania. In natural habitats, it easily intercrosses with other sage species, such as S. nemorosa, S. nutans, and S. pratensis, with the hybrids described as nothospecies S. ×hybrida, S. ×telekiana, and S. ×bichigeanii, respectively. One specimen from GOET is designated here as a lectotype of S. pratensis var. transsylvanica, the basionym of S. transsylvanica. In addition, three specimens from LW, BP, and BUCA are designated as the lectotypes for hybrid names. Main diagnostic features of S. transsylvanica, its hybrids, and respective second parental species are compared and discussed.

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NATURAL HYBRIDS BETWEEN Manihot reptans Pax AND M. alutacea Rogers & Appan

Canadian Journal of Plant Science ◽

10.4141/cjps84-062 ◽

1984 ◽

Vol 64 (2) ◽

pp. 423-425 ◽

Cited By ~ 10

Author(s):

NAGIB M. A. NASSAR

Keyword(s):

Parental Species ◽

Sympatric Distribution ◽

Natural Hybrids ◽

Disturbed Habitats

Natural hybrids between M. reptans and M. alutacea in Goias state, Brazil are described. Hybridization occurred in disturbed habitats where there is a sympatric distribution of the parental species. There is evidence for progressive introgression of germplasm into M. reptans.Key words: Wild cassava, Manihot reptans, natural hybrids, introgression, M. alutacea

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Gene flow between introduced and native Eucalyptus species: exotic hybrids are establishing in the wild

Australian Journal of Botany ◽

10.1071/bt03016 ◽

2003 ◽

Vol 51 (4) ◽

pp. 429 ◽

Cited By ~ 29

Author(s):

R. C. Barbour ◽

B. M. Potts ◽

R. E. Vaillancourt

Keyword(s):

Gene Flow ◽

Native Species ◽

Parental Species ◽

F1 Hybrids ◽

Eucalyptus Species ◽

Eucalyptus Nitens ◽

Natural Hybrids ◽

In The Wild ◽

Long Term Impact

F1 hybrids between exotic Eucalyptus nitens plantations and native E. ovata have previously been reported among seedlings grown from open-pollinated seed collected from E. ovata, on the island of Tasmania. Such exotic hybrid seedlings have now been found in the wild adjacent to plantations at three locations. The proportion of exotic hybrids in open-pollinated seed collected from nearby mature E. ovata was 5.5%. This level compares with only 0.4% for natural hybrids between native species at these sites (E. ovata, E. viminalis and E.�rodwayi). Detection of hybrids was initially based on their deviant morphology, which was generally intermediate between parental species. This subjective classification was then successfully verified by morphometric and allozyme analyses. Pure E. nitens seedlings (wildlings) were restricted to within 30 m of these plantations, whereas established hybrids were found up to 310 m from the plantations. This pattern of establishment reflects dispersal of exotic seed and pollen respectively. It is likely that the recent expansion of the eucalypt plantation estate in Australia will cause an increase in the frequency of exotic hybrids. However, the long-term impact of such hybridisation is yet to be assessed.

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POLLEN TRANSFER BY NATURAL HYBRIDS AND PARENTAL SPECIES IN AN IPOMOPSIS HYBRID ZONE

Evolution ◽

10.1111/j.1558-5646.1998.tb02241.x ◽

1998 ◽

Vol 52 (6) ◽

pp. 1602-1611 ◽

Cited By ~ 31

Author(s):

Diane R. Campbell ◽

Nickolas M. Waser ◽

Paul G. Wolf

Keyword(s):

Hybrid Zone ◽

Parental Species ◽

Pollen Transfer ◽

Natural Hybrids

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The Vocalizations of Some Hybrid Treefrogs: Acoustic and Behavioral Analyses

Behaviour ◽

10.1163/156853974x00435 ◽

1974 ◽

Vol 49 (1-2) ◽

pp. 130-151 ◽

Cited By ~ 50

Author(s):

H. Carl Gerhardt

Keyword(s):

Acoustic Signal ◽

Parental Species ◽

Spectral Composition ◽

Temporal Domain ◽

Natural Hybrids ◽

Spectral Peaks ◽

Partial Discrimination

AbstractThe vocalizations of natural hybrids between various species of treefrogs (Hylidae) are compared with the vocalizations of the parental species : 1. In most respects, the calls of two males of H. avivoca X H. chrysoscelis and of six males of H. cinerea X H. gratiosa are intermediate. 2. The vocalizations of three males of H. femoralis X H. clarysoscelis tend to be similar to those of males of H. chrysoscelis. 3. The calls of each of the hybrids are composed, however, of some features which are intermediate, some which are similar to one of the parental species, and others which are unique to hybrid calls. Differentiation of the calls of males of H. avivoca, H. chrysoscelis, H. femoralis, and hybrids in this group is mainly in the temporal domain. Females of H. chrysoscelis and H. femoralis responded only to the calls of males of their own species in discrimination experiments where hybrid calls were alternative stimuli. The calls of males of H. cinerea, H. gratiosa and hybrids between these two differ primarily in their spectral composition : the two spectral peaks have different locations in each kind of call. In discrimination experiments, females of H. gratiosa responded only to conspecific calls when the calls of hybrids were equally accessible. Females of H. cinerea showed partial discrimination against the calls of hybrids. Females of both kinds often responded to the calls of hybrids when conspecific signals were unavailable. In general, the closer the spectrum of a natural call resembled that of conspecific calls, the more attractive was the acoustic signal.

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