Chromosome morphology of 12 species and one variety of Lachenalia and five species of closely related, allied genera (Liliaceae)
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Somatic chromosomes in 12 species and one variety of <I>Lachenalia</I> and their closely related, two species of <I>Massonia</I> and three species of <I>Polyxena</I>, all in the Liliaceae, were studied. The resting nuclei of all of the taxa studied were commonly classified as the round prochromosome type. The mitotic prophase chromosomes of the taxa studied were commonly classified as the proximal type. However, their chromosome numbers varied from 2n=14, 16, 18, 22, 24, 26 to 28. The chromosome numbers of 2n = 14 in <I>Lachenalia algoensis, L. aloides</I> 'Lutea', and <I>L. longibracteata</I>; 2n = 18 in <I>L. latimerae</I>; and 2n = 28 in <I>Massonia pustulata</I> and <I>Polyxena longituba</I> were reported here for the first time. The 13 taxa of <I>Lachenalia</I> studied were classified karyotypically into six groups. The two species of <I>Massonia</I> studied showed commonly the bimodal karyotype with four large chromosomes and the three species of <I>Polyxena</I> studied showed commonly the bimodal karyotype with three large chromosomes. The species of <I>Massonia</I> displayed much larger chromosomes at mitotic metaphase than those of the other two genera.
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国際染色体植物学会 | 論文
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