The Formation of Chromocenters in Interkinetic Nuclei of Maize by Knobs and B Chromosomes

Morgan, D. T.

doi:10.1093/oxfordjournals.jhered.a105283

Cited by 6 publications

(3 citation statements)

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“…The situation m rye is an example, and has been described in detail by Jones & Puertas (1993). In this case, as in many others, there is a recognizable standard form of tbe B which occurs predominantly, and the Moir & Fox (1972, 1977 Barlow & Vosa (1969) Darlington & Upcott (1941); Morgan (1943) various derivatives only exist in populations as ephemeral products of the mutationa] events w'hich generate them. It is indeed surprising that in rye, which has a widespread geographic distribution (Jones & Puertas, 1993), all populations carry a form of the B which is morphologically identical at mitotic metaphase.…”

Section: Morphologysupporting

confidence: 51%

B chromosomes in plants

1995

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summary This review of supernumerary B chromosome systems in flowering plants deals mainly with work published in the last 15 yr, hut also includes older material which has not hitherto been presented systematically. The term B chromosome (B) is defined, and there is an introductory overview dealing with general characteristics and the significance of Bs as a widespread chromosome polymorphism. Detailed sections are then presented covering the occurrence of Bs in different taxa, their structure and molecular organization, their irregular modes of inheritance, their phenotypic effects, population dynamics and origin. Particular attention is paid to the research growth points in molecular analysis of the structure and genome organization of Bs, and to transmission genotypes in the context of their adaptive versus their selfish properties. Where appropriate, reference is also made to likely future lines of research, and also to the usefulness of B chromosomes in genetic analysis and as model systems to study general phenomena of genome organization and evolution, nuclear physiology and architecture, chromosome polymorphism and selfish DNA.

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Section: Morphologysupporting

confidence: 51%

B chromosomes in plants

1995

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“…Partially sterile plants occurred in populations produced by each of five such crosses but not in the expected proportion. In the five populations resulting from such crosses, the percentages of partially sterile plants were 4,4,13,17, and 20.…”

Section: Modification Of the Male-sterile Charactermentioning

confidence: 99%

“…Paxson and Mangelsdorf' s 3 list of knob counts for Latin American varieties also provided a source of information for such comparisons. In addition to the published lists of knob numbers, knob number was estimated for varieties of Peruvian, Ecuadorian, and Bolivian corn using the root tip technique of Morgan ( 4).…”

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confidence: 99%