Radiation-induced Interspecific Transfer of Ws(pbg) Gene from Nicotiana plumbaginifolia to N. tabacum. : I. Some observations on the irradiated hybrid plants.
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چکیده
منابع مشابه
Effect of radiation dosage on efficiency of chloroplast transfer by protoplast fusion in Nicotiana.
Chloroplasts of Nicotiana tabacum SR1 were transferred into Nicotiana plumbaginifolia by protoplast fusion. The protoplasts of the organelle donor were irradiated with different lethal doses using a (60)Co source, to facilitate the elimination of their nuclei from the fusion products. After fusion induction, clones derived from fusion products and containing streptomycin-resistant N. tabacum SR...
متن کاملCytological investigations of the interspecific hybrids of Nicotiana tabacum L. x N. glauca Grah.
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 کاملGenes in S and T Subgenomes Are Responsible for Hybrid Lethality in Interspecific Hybrids between Nicotiana tabacum and Nicotiana occidentalis
BACKGROUND Many species of Nicotiana section Suaveolentes produce inviable F(1) hybrids after crossing with Nicotiana tabacum (genome constitution SSTT), a phenomenon that is often called hybrid lethality. Through crosses with monosomic lines of N. tabacum lacking a Q chromosome, we previously determined that hybrid lethality is caused by interaction between gene(s) on the Q chromosome belongin...
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...
متن کاملextensions of some polynomial inequalities to the polar derivative
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ژورنال
عنوان ژورنال: Japanese Journal of Breeding
سال: 1966
ISSN: 0536-3683,2185-291X
DOI: 10.1270/jsbbs1951.16.260