SEGREGATION IN NEW ALLOPOLYPLOIDS OF NICOTIANA. I. COMPARISON OF 6x (N. TABACUM x TOMENTOSIFORMIS) AND 6x (N. TABACUM x OTOPHORA)
نویسندگان
چکیده
منابع مشابه
Flower Variegation in Hybrids between NICOTIANA TABACUM and N. OTOPHORA.
HE fate of genes and chromosomes following interspecific gene transfer Tdeserves detailed study. Genes of one species often can be introduced into another without evident changes of their action and with little effect upon their stability. ANDERSON'S (1949) widely known work on introgression after interspecific hybridization could not have been successful had he been dealing with unstable genet...
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Interspecific amphihaploid and amphidiploid hybrids between Nicotiana glauca Grah. (2n = 24) and N. tabacum L. (2n = 48) cultivars BY 103 and K 326 were analysed. F1 amphihaploids (2n = 36) were viable and completely self- and cross-sterile, and mostly univalents were present during meiosis (with pairing range from 0 to 5). In some meiocytes, meiotic irregularities were observed, such as sporad...
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G ENETIC segregation in synthetic allopolyploids of the genus Gossypium has been described in several earlier papers by the author and his colleagues (see GERSTEL and PHILLIPS 1958, for a summary). We had found in that genus that allopolyploids produced from two very closely related species segregated like autopolyploids, i.e. they gave approximately 5: 1 ratios for crosses of the duplex type Z...
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The use of tobacco dates back to the ancient civilizations of the Americas, where it played a central role in religious occasions. The peoples smoked tobacco in cigars and pipes and chewed it with lime, for its pleasurable euphoriant effects. In the 16 th century, Europeans spread the use of tobacco in North America, while the Spanish bring it into Europe. In the 1559, Jean Nicot, the French am...
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Xylanase (EIX) from the fungus Trichoderma viride elicits ethylene biosynthesis in leaf tissues of Nicotiana tabacum cv Xanthi but not in cv Hicks. The increase in ethylene biosynthesis is accompanied by an accumulation of 1-aminocyclopropane-1-carboxylic acid (ACC), an increase in extractable ACC synthase activity, and increases in ACC synthase and ACC oxidase transcripts. Priming of leaves wi...
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ژورنال
عنوان ژورنال: Genetics
سال: 1960
ISSN: 1943-2631
DOI: 10.1093/genetics/45.12.1723