J Integr Plant Biol. ›› 1988, Vol. 30 ›› Issue (3): -.
• Research Articles •
John H. Blackson and William Tai
Abstract: Four cultivars of Phaseolus coccineus L., five cultivars of P. vulgaris L. and one collectionof P. vulgaris var. aborigineus (Burk.) Baudet were examined cytologically for the presenceof secondary association of bivalents (bivalent pairing) during metaphase 1 of meiosis in pollen mother cells. Statistical methods were presented for evaluating the deviation of the observed degree of association to that expected at random. The degree of secondary pairing wasfound to be highly significant. Transmission electron microscope techniques were modified to enable the viewing of squashed but intact pollen mother cells which showed that a physicalconnection could occur between bivalents secondarily associated.
Key words: Secondary association, Homologous chromosome, Phaseolus
John H. Blackson and William Tai. Cytological and Statistical Analysis of Secondary Association in the Genus Phaseolus[J]. J Integr Plant Biol., 1988, 30(3): -.
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