Quantitative karyotypic analysis in five taxa of Aloe

Abstract

Quantitative karyotypic analysis in five taxa of Aloe (taxa -1, 2, 3 and 4 with 2n=14 but taxon-5 with 2n=28) revealed differences in chromosome length, total chromatin length (TCL) and total frequency % (TF%). The identified chromosome pairs were I, II, IV, V, VI, VII in taxon-1, I, II, IV, V, VI, VII in taxon-2, II, III, V, VI in taxon-3, I, II, IV, V, VI, VII  in taxon-4 and II, IV, V, VI, VII, IX, X, XI, XIII, XIV in taxon-5. Unidentified chromosomes were allocated to different morphological classes based on probabilistic inferences. Only the sub median (Sm) and sub terminal (St) chromosomes were observed. The proposed standard karyotype were 3M^3St+1S₁^1St+3S₂^3Sm for taxon-1, 1L^1St+3M^3St+3S₂^3Sm for taxon-2, 2L^2St+2M^2St+1S₁^1Sm+2S₂^2Sm for taxon-3, 3L^3St+1M^1St+3S₂^3Sm for taxon-4 and 3M^3St+5S₁^5St+6S₂^6Sm for taxon-5.