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This study aimed at assessing the hybridization feasibility and evaluating genetic fidelity of the hybrid seedlings originated from Phaius mishmensis (Lindl. and Paxton) Rchb. f. and P. tankervilliae (Banks) Blume. Intra- and interspecific hybridization between Phaiusmishmensis (Lindl. and Paxton) Rchb. f. and P. tankervilliae (Banks) Blume were examined to establish the primary hybrid, observe their cross ability and identify the F1 hybrids using sequence-characterized amplified region (SCAR) markers. Self-incompatibility and cross ability of P. mishmensis and P. tankervilliae were tested before starting the breeding program. Results showed that they were self-compatible orchids. The interspecific hybridization between P. mishmensis and P. tankervilliae was achieved with the highest pod setting (80%), seed germination percentage (94.8%) and the rate of protocorm development into mature seedlings (stage 6) (10.6%), but the smallest size of embryo with width 46.5 μm, length 67.3 μm was also observed when P. mishmensis was taken as the female parent. A comparative study on leaf morphology and anatomy of plantlets regenerated from intra- and interspecific hybrids of P.mishmensis and P. tankervilliae showed a transitional character to the parental species. Herein, the presence of interspecific hybrids between P.mishmensis and P. tankervilliae, as well as their reciprocal cross, was verified using Pmis524 SCAR markers developed by the decamer primer.

agriculture

Production and Molecular Identification of Interspecific Hybrids between Phaius mishmensis (Lindl. and Paxton) Rchb. f. and Phaius tankervilliae (Banks) Blume