منابع مشابه
Embryo Development in Nicotiana Species Hybrids.
I n a study of the compatibilities of certain Nicotiana species, several crosses were reported which produce seeds unable to germinate. (MCCRAY 1932). Many others are recorded in the literature on this genus. Some of these seeds are parthenocarpic; others have embryos not able to develop. In still other cases the hybrid germinates but is unable to carry on further. All degrees of vigor have bee...
متن کاملSpontaneous morphological alterations of chromosomes in Nicotiana hybrids.
EVERAL workers have already reported that hybridization between Nicotiana species can bring about chromosome instability. One conspicuous case is loss of somatic plumbaginifolia chromosomes in derivatives of N . tabacum X N . plumbaginifolia hybrids (MOAV 1961). The present paper deals with another peculiarity of alien chromosomes in tobacco hybrid derivatives. It reports on heritable changes i...
متن کاملA Cytogenetic Study of Heritable Tumors in Nicotiana Species Hybrids.
ENETIC tumors in Nicotiana species hybrids have been reported by several Ginvestigators. These tumors are formed in certain specific hybrid combinations on stems, roots, and occasionally on leaves of all or part of the F, progeny. Since the discovery by KOSTOFF (1930) of nine interspecific tumorous hybrids, almost 20 additional hybrid combinations have been reported in which the entire progeny ...
متن کاملFlower 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...
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...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1913
ISSN: 0006-8071
DOI: 10.1086/331079