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Wyszukujesz frazę "interspecific hybridization" wg kryterium: Temat


Tytuł:
Hybridization results using the hybrid Abies cilicica × Abies cephalonica
Wyniki hybrydyzacji przy użyciu hybrydy Abies cilicica Abies × cephalonica
Autorzy:
Kobliha, J.
Škorpik, P.
Stejskal, J.
Češka, P.
Tematy:
hybridization
hybrid
Abies cilicica x Abies cephalonica
needle
morphology
plant morphology
interspecific hybridization
Pokaż więcej
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Powiązania:
https://bibliotekanauki.pl/articles/11542972.pdf  Link otwiera się w nowym oknie
Opis:
Abies fraseri (FF) is a North American conifer which is crucial for growers of Christmas trees. This species suffers 100% mortality after infection of root rot caused by Phytophthora cinnamomi. The hybrid material A. cilicica × A. cephalonica (CZ) and A. koreana × (A. cilicica × A. cephalonica) was utilized as mother trees for applications of Abies fraseri pollen. In addition to resistance to fungal disease, a long-term monitoring of growth of young seedlings along with the impact of artificial crossing on morphology of the progeny is covered. Except for increased resistance, some offspring has also exhibited a remarkable heterosis effect at younger age and different growth habit and different shape of their needles. All this may offer in the future a wide range of applications, both for crops under strong anthropogenic pressure with changing climatic conditions and for crops grown for production of Christmas trees and outstanding ornamental cultivars. Annual crossing success was determined in present study using X-ray imaging. The most successful combinations in 2012 were those of CZ1 × FF25 and CZ1 × FF76 with 7% of full seeds, followed by CZ2 × FF25 with 6% and CZ2 × FF31 with 4% of the full seeds. The evaluation of young seedlings from control crossing in 2007 highlighted significant accented height growth of complicated hybrid (A. koreana × (A. cilicica × A. cephalonica)) × FF PC. Morphology of needles showed variability in their length as compared with the needle width which was found to be less appropriate characteristic for distinguishing between different combinations.
Abies fraseri (FF) jest północno-amerykańskim iglakiem ważnym z punktu widzenia hodowców choinek świątecznych. Gatunek ten wykazuje 100% śmiertelność po porażeniu zgorzelą korzenia spowodowaną przez Phytophthora cinnamomi. Materiał hybrydowy A. cilicica × A. cephalonica (CZ) oraz A. koreana × (A. cilicica × A. cephalonica) został wykorzystany jako drzewa matczyne do aplikacji pyłku Abies fraseri. Poza odpornością na chorobę od grzybową, badania dotyczyły długoterminowego monitorowania wzrostu młodych siewek oraz wpływu sztucznego krzyżowania na morfologię potomstwa. Oprócz zwiększonej odporności, niektóre młode rośliny wykazały znaczny efekt heterozy, różny wzrost i różny kształt igieł. Wszystko to może w przyszłości dać wiele różnorodnych zastosowań, zarówno w przypadku roślin pod silną presją antropogeniczną przy zmiennych warunkach klimatycznych jak i dla roślin hodowanych do produkcji choinek świątecznych oraz na wybitne odmiany ozdobne. Powodzenie corocznego krzyżowania określono w niniejszym badaniu pryz użyciu promieniowania rentgenowskiego. Najbardziej udanymi kombinacjami w 2012 r. były CZ1 × FF25 i CZ1 × FF76 z 7% pełnych nasion, a następnie CZ2 × FF25 z 6% i CZ2 × FF31 z 4% pełnych nasion. Ocena młodych sadzonek pochodzących z kontrolnego krzyżowania w 2007 r. wskazała na istotnie zaznaczony wzrost złożonej hybrydy (A. koreana × (A. cilicica × A. cephalonica)) × FF PC. Morfologia igieł wykazała różnorodność ich długości w porównaniu z szerokością igieł, która była mniej istotną cechą do odróżnienia kombinacji.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Embryo development after interspecific hybridization of Lupinus albus L., L. mutabilis Sweet. and L. angustifolius L.
Autorzy:
Przyborowski, J A
Packa, D
Tematy:
Lupinus angustifolius
Lupinus mutabilis
hybridization
embryonic development
interspecific hybridization
lupin
in vitro
Lupinus albus
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/2046827.pdf  Link otwiera się w nowym oknie
Opis:
Embryo development of Lupinus albus L. and L. mutabilis Sweet. after pollination with L. angustifolius L. was studied. Observations of ovules revealed non-typical embryo development. From the 5th day after pollination, high number of degenerated ovules was found; the highest number was observed on 15 and 20 days after pollination. The period between the 10th and 15th day after pollination was the most suitable for isolation of embryos in all the examined combinations, with exception L. albus x L. angustifolius where optimal isolation time was between 15th and 20 th day after pollination. Embryos were obtained in each cross-pollination. Some of them developed in vitro into plantlets and grew in an artificial medium for some time, but most of them died due to non-typical development of the root system, stem, or both. The hybrid character of the survived plants requires confirmation.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genome size and phenotypic variation of Nymphaea (Nymphaeaceae) species from Eastern Europe and temperate Asia
Autorzy:
Suda, Jan
Zalewska-Gałosz, Joanna
Dąbrowska, Magdalena
Volkova, Polina
Skubała, Kaja
Opis:
Despite long-term research, the aquatic genus Nymphaea still possesses major taxonomic challenges. High phenotypic plasticity and possible interspecific hybridization often make it impossible to identify individual specimens. The main aim of this study was to assess phenotypic variation in Nymphaea taxa sampled over a wide area of Eastern Europe and temperate Asia. Samples were identified based on species-specific genome sizes and diagnostic morphological characters for each taxon were then selected. A total of 353 specimens from 32 populations in Poland, Russia and Ukraine were studied, with nine biometric traits being examined. Although some specimens morphologically matched N. ×borealis (a hybrid between N. alba and N. candida) according to published determination keys, only one hybrid individual was revealed based on genome size data. Other specimens with intermediate morphology possessed genome size corresponding to N. alba, N. candida or N. tetragona. This indicates that natural hybridization between N. alba and N. candida is not as frequent as previously suggested. Our results also revealed a considerably higher variation in the studied morphological traits (especially the quantitative ones) in N. alba and N. candida than reported in the literature. A determination key for the investigated Nymphaea species is provided, based on taxonomically-informative morphological characters identified in our study.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Natural hybridization between Gladiolus palustris and G. imbricatus inferred from morphological, molecular and reproductive evidence
Přirozená hybridizace mezi Gladiolus palustris and G. imbricatus, zjištěná na základě morfologických, molekulárních a reprodukčních znaků
Autorzy:
Heise, Waldemar
Słomka, Aneta
Kamiński, Ryszard
Kuta, Elżbieta
Cieślak, Elżbieta
Szczepaniak, Magdalena
Opis:
While studying the extremely rare species, Gladiolus palustris, in Poland, putative hybrid plants were discovered. Natural hybridization between G. palustris and G. imbricatus was confirmed by chloroplast (psbA-trnH and rpl32-trnL) DNA and nuclear ribosomal DNA (ITS1) sequences AFLP markers and macro-, micromorphological and reproductive characters. Based on molecular data, the hybridization events are likely to have occurred relatively recently with G. palustris as the maternal species and G. imbricatus as the pollen donor in interspecific crosses. The existence of a shared common cpDNA haplotype in all hybrids and G. palustris indicates unidirectional hybridization. A new nothospecies, G. ×sulistrovicus, is described. Analyses of AFLP data and polymorphisms of ITS1 sequences showed additive inheritance of parental genomic fragments in G. ×sulistrovicus. The hybrids exhibited either morphological similarity to G. imbricatus or intermediateness in phenotypic characters. The corm structure of flowering plants and seed capsules clearly distinguish the hybrid. The new taxon is characterized by a lower generative reproduction than the parental species, however hybrids produce ~50% viable pollen and seeds, which allows them to produce subsequent hybrid generations. The weak generative reproduction was enhanced by highly efficient vegetative propagation. The western part of the Balkan Peninsula and adjacent areas (Croatia, Bosnia and Hercegovina, Serbia, northern Italy) and central Europe (Poland, the Czech Republic, Slovakia, eastern Austria, Hungary) are the most likely areas where G. ×sulistrovicus will occur. Hybridity in the context of G. palustris conservation is discussed.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Evaluation of crossability of Cuphea lanceolata and C. viscosissima based on pollen tube growth and seed set
Autorzy:
Wojciechowski, A
Olejniczak, J
Adamska, E
Tematy:
pollen tube
fluorescence
Cuphea viscosissima
crossing
seed oil
incompatibility
interspecific hybridization
fatty acid
growth
crossability
Cuphea lanceolata
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/2047262.pdf  Link otwiera się w nowym oknie
Opis:
Many species of Cuphea genus show promise as rich natural sources of valuable seed oils for commercial utility. Among them are C. lanceolata and C. viscosissima which seed oils contain medium-chain fatty acids. Reciprocal crosses were made between these species to assess their usefulness for Cuphea breeding program. The degree of crossability between C. lanceolata and C. viscosissima was determined by pollen grain germination and pollen tube growth observed using fluorescence microscopy in addition to capsule formation and seed number per capsule. Treatment of the pollen grain with a laser microbeam reduced the number of germinated pollen grains, tubes growth in the pistil and seed set when C. viscosissima plants were used in the crosses as a female form. In the cross C. lanceolata (female form) × C. viscosissima the pollen treatment with a laser microbeam improved pollen tube growth but reduced seed set. Crossability evaluated on the basis of pollen tube growth and seed set showed unilateral interspecific incompatibility in crosses involving C. lanceolata plants as a female form.
Dostawca treści:
Biblioteka Nauki
Artykuł

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