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Plantlet regeneration from somatic hybrids of rice oryza sativa l. and barnyard grass echinochloa oryzicola vasing

Plantlet regeneration from somatic hybrids of rice oryza sativa l. and barnyard grass echinochloa oryzicola vasing

Molecular and General Genetics 210(1): 39-43

DOI: 10.1007/bf00337756

Somatic hybridization of rice (Oryza sativa L.) and barnyard grass (Echinochloa oryzicola), a close relative of barnyard millet, was attempted using electrofusion and a new culture method developed for rice protoplasts (Kyozuka et al. 1987) to incorporate some of the agronomically important characters of the latter species into rice. Selection of hybrids was based on inactivation of rice protoplasts by iodoacetamide and the inability of barnyard grass protoplasts to divide. A total of 166 calli were identified as hybrids by isozyme and chromosome analyses. Hybrid calli were highly morphogenic, and 44 shoots were obtained. Most of them, however, were abnormal, and nine grew to plantlets whose morphology was distinct from that of either parent. Our study clearly demonstrates the totipotency of protoplasts in graminaceous monocots.

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Accession: 006126990

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