GENETIC INSTABILITY IN NICOTIANA HYBRIDS. II. STUDIES OF THE Ws(pbg) LOCUS OF N. PLUMBAGINIFOLIA IN N. TABACUM NUCLEI
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...
متن کاملThe Unstable Behavior of a Chromosomal Fragment of NICOTIANA PLUMBAGINIFOLIA Responsible for Chlorophyll Variegation in N. TABACUM.
HE origin of chromosome instability and subsequent chlorophyll variegation Tin hybrid derivatives of Nicotiana tabacum (n=24) and N . plumbaginifolia (n=10) has been described by MOAV (1961) and GUPTA (1965, 1968b). It was demonstrated by (GUPTA 1968b) that the alien chromosome of N . plumbaginifolia (pbg) carrying a Ws gene (chlorophyll factor) showed instability in association with the N . ta...
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in current study, 63 samples of bat populations collected from differ regions were used for evaluating the geographic variations. twenty cranial and dental characters for traditional morphometric and landmarks method on the ventral, dorsal skull and mandible for geometry morphometric studies were used. statistical analyses of traditional morphometric and geometry morphometric data indicated low...
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ژورنال
عنوان ژورنال: Genetics
سال: 1961
ISSN: 1943-2631
DOI: 10.1093/genetics/46.9.1069