Ontology type: schema:ScholarlyArticle
1979-02
AUTHORSM. S. Ramanna, J. G. Th. Hermsen
ABSTRACTUniformly abnormal meiotic behaviour was observed in 12 F1-plants from a cross between Solanum etuberosum (non-tuberous) and S. pinnatisectum (tuberous). Per pollen mother cell at MI an average was found of 3.64 bivalents (all rodshaped, 1–2 per cell, heteromorphic), 16.64 univalents (scattered haphazardly on a continuous bipolar spindle) and 0.03 trivalents (all Y-shaped). Lagging chromosomes and precocious division of univalents very frequently occurs, leading to unequal distribution of chromosomes, aneuploid gametes and male sterility. Heteromorphic bivalents at MI, loops in bivalents at pachytene and non-disjunction in one hybrid plant, point to a highly abnormal meiotic behaviour. The occurrence of few trivalents is discussed. Considering that according to the literature nearly normal pairing was observed in the intergeneric F1-hybrids Lycopersicon esculentum × Solanum lycopersicoides and L. esculentum x S. pennellii, the lack of chromosome pairing in an interspecific F1-hybrid, of which both Solanum parents belong to the same section, is paradoxical to a plant breeder and might even be conspicuous to a taxonomist. More... »
PAGES9-15
http://scigraph.springernature.com/pub.10.1007/bf00029167
DOIhttp://dx.doi.org/10.1007/bf00029167
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