Meiotic Studies in Some Species of Tribe Cichorieae (Asteraceae) from Western Himalayas

Figure 2

(a-b) PMC showing transfer of chromatin material in Taraxacum officinale and Hieracium umbellatum, respectively. (c) PMC at metaphase-I showing chromatin stickiness in tetraploid cytotype of T. officinale. (d) PMC showing late disjunction at anaphase-1 (arrowed). (e) PMC at telophase-II showing chromatin bridges (arrowed). (f) PMC at anaphase-I showing chromatin laggards (arrowed) in triploid cytotype of T. officinale. (g) Monad. (h) Diad with micronuclei. (i) Triad with micronucleus. (j) Tetrad with micronucleus. (k) Heterogeneous sized fertile and sterile (arrowed) pollen grains. (Scale: 10 μm, IV: quadrivalent, II: bivalent, I: univalent.)

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