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Caryologia
International Journal of Cytology, Cytosystematics and Cytogenetics
Volume 65, 2012 - Issue 3
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Articles

Cytogenetic characterization of induced tetraploids in medicinal plant (Platycodon grandiflorus)

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Pages 182-186 | Published online: 08 Nov 2012

Figures & data

Figure 1 Meiosis behavior of PMCs in diploid controls of P. grandiflorus. (A) interphase; (B) leptotene; (C) zygotene; (D) pachytene; (E) diplotene; (F, G) diakinesis; (H–J) metaphase I; (K) anaphase I; (L) telophase I; (M) prophase; (N) metaphase II; (O) anaphase II; (P) telophase II (tetrad); (Q, R) mature and viable pollen grains. Bar = 5 μm.

Figure 1 Meiosis behavior of PMCs in diploid controls of P. grandiflorus. (A) interphase; (B) leptotene; (C) zygotene; (D) pachytene; (E) diplotene; (F, G) diakinesis; (H–J) metaphase I; (K) anaphase I; (L) telophase I; (M) prophase; (N) metaphase II; (O) anaphase II; (P) telophase II (tetrad); (Q, R) mature and viable pollen grains. Bar = 5 μm.

Figure 2 Meiosis behavior of PMCs in induced tetraploid of P. grandiflorus. (A) interphase; (B) leptotene; (C) zygotene; (D) pachytene; (E) diplotene; (F) diakinesis; (G) metaphase I; (H) anaphase I; (I–J) telophase I (arrow showing laggard chromosome); (K–L) telophase I (arrow showing chromosome bridge); (M) prophase II; (N) metaphase II; (O) insynchronous chromosome segregation at telophase II; (P) polyploidy cell (chimeras); (Q–R) inviable pollen grains. Bar = 5 μm.

Figure 2 Meiosis behavior of PMCs in induced tetraploid of P. grandiflorus. (A) interphase; (B) leptotene; (C) zygotene; (D) pachytene; (E) diplotene; (F) diakinesis; (G) metaphase I; (H) anaphase I; (I–J) telophase I (arrow showing laggard chromosome); (K–L) telophase I (arrow showing chromosome bridge); (M) prophase II; (N) metaphase II; (O) insynchronous chromosome segregation at telophase II; (P) polyploidy cell (chimeras); (Q–R) inviable pollen grains. Bar = 5 μm.

Figure 3 Various chromosome configurations in metaphase I of meiosis in induced tetraploids of P. grandiflorus. (A) Arrow showing quadrivalent; (B) arrow showing trivalent; (C) arrows showing univalent and trivalent.

Figure 3 Various chromosome configurations in metaphase I of meiosis in induced tetraploids of P. grandiflorus. (A) Arrow showing quadrivalent; (B) arrow showing trivalent; (C) arrows showing univalent and trivalent.

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