Wszystkie pola: parthenogenesis - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Reproduction and genetic structure of a freshwater crustacean Lepidurus arcticus from Spitsbergen
Autorzy:: Wojtasik, Barbara
Bryłka-Wołk, Magdalena
Powiązania:: https://bibliotekanauki.pl/articles/2051629.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Arctic
Svalbard
Crustacea
Lepidurus arcticus
parthenogenesis
males
allozymes
Źródło:: Polish Polar Research; 2010, 1; 33-44
0138-0338
2081-8262
Pojawia się w:: Polish Polar Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Identification of apomixis in the Kentucky bluegrass (Poa pratensis L.) using auxin test
Autorzy:: Niemann, J.
Wojciechowski, A.
Janowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/56744.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: identification
apomixis
Kentucky bluegrass
Poa pratensis
auxin test
embryo sac
endosperm
ovule
parthenogenesis
Opis:: The effect of auxin treatment on the formation of apomictic – endospermless grains in Poa pratensis was investigated in the study. Four polish cultivars: Skiz, Eska 46, Alicja, Ani as well as six breeding lines: POB 13, SK-W-33, SKW-15, SKW-35A, SK-W-35A and SK-W-35B were tested by embryological methods to reveal the reproduction pathway in greenhouse and field conditions. The obtained results showed that four genotypes, i.e. Alicja, Ani, Eska 46 and SK-W-35B are facultative apomictic and the other have formed seeds only on the apomictic way. In facultative apomicts it was found that in many cases both endospermless ovules containing embryo sacs with embryos or embryo sacs with well developed endosperm were formed. In the case of apomictic genotypes only endospermless seeds were observed.
Źródło:: Acta Societatis Botanicorum Poloniae; 2012, 81, 3
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Preservation of armoured scale insects on angiosperm leaves from the Eocene of Germany
Autorzy:: Wappler, T.
Ben-Dov, Y.
Powiązania:: https://bibliotekanauki.pl/articles/20619.pdf
Data publikacji:: 2008
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: preservation
insect
Insecta
angiosperm
leaf
Eocene
Germany
paleontology
Hemiptera
Coccoidea
plant-insect interaction
herbivore
parthenogenesis
fossil record
insect-plant association
Opis:: Of the 30 extant orders of insects, scale insects (Hemiptera: Coccoidea) have one of the best fossil records among insects that probably extends to the early Mesozoic. Most fossil Coccoidea records are of adult males which have been trapped in amber, whereas adult females are less common, probably because of their sedentary occurrence on plants. Descriptions, photos, and SEM micrographs are presented of over 250 well−preserved scale covers of adult females and nymphal stages of armoured scale insects (Hemiptera: Coccoidea: Diaspididae) which were found on dicotyledonous and monocotyledonous fossil leaves in Middle Eocene deposits from Germany. The structure of these fossil scale covers closely agrees with that of extant Diaspididae. These armoured scale insects belong to the subfamily Aspidiotinae. The age of this insect−plant association—47 to 44 million−year−old—indicates that the Diaspididae have a long history in the Palaearctic region.
Źródło:: Acta Palaeontologica Polonica; 2008, 53, 4
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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