Cytological Characterization of Interspecific Hybrids in Rice (Oryza ativa L.)
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Abstract
The wild species of Oryza are an important source of useful genes for resistance to biotic and abiotic stresses in rice. In this study, wide hybridization was used to widen the genepool of japonica rice cultivars. Interspecific crosses were made between three japonica rice cultivars and four wild species of the genus Oryza. Hybrids were produced normally through crosses between O. sativa (AA genome) and O. rufipogon (AA genome). However, hybrids between O. sativa and other distantly related wild species such as O. officinalis (CC genome), O. minuta (BBCC genome), and O. alta (CCDD genome) were produced following hybridization and embryo rescue. The hybrids were intermediate in their morphological characters, compared with the parents of cultivated and wild species. The hybrids between O. sativa and O. rufipogon were partially sterile but the hybrids between O. sativa and O. officinalis, O. sativa and O. minuta, O. sativa and O. alta were completely sterile. Cytological analysis of the interspecific hybrids, AA x CC, AA x BBCC, AA x CCDD showed irregular meiosis with predominant occurrence of univalents and unequal distribution of chromosomes at anaphase 1 of meiosis. Genomic In-situ Hybridization (GISH) analysis showed the presence of O. minuta chromosomes in the F1 hybrids between O. sativa and O. minuta cross.
참고문헌 (15)
- "Detection of autosyndetic and allosyndetic pairing among A and E genomes of Oryza through genomic in situ hybridization", pp.24~25 (1999)
- "Two new genomes in the Oryza complex identified on the basis of molecular divergence analysis using total genomic DNA hybridization", pp.1~12 (1996)
- "Interspecific hybrids produced through embryo rescue between cultivated and eight wild species of rice", pp.91~93
- "Overcoming the barriers in hybridization", mo(graph), pp.47~61
- "Embryo rescue of interspecific hybrids and its scope in rice improvement", pp.133~134
- "Monogenic alien addition lines of rice", ge(me 32), pp.449~455
- "Introgression of genes from Oryza officinalis Well ex Watt to cultivated rice", pp.737~745
- "Exploitation of alien species in rice improvement-Oppertunities, Achievements and Future challenges", pp.271~285, J.S. Nanda Edition, Oxford and IBH Pub Co. PVT Ltd
- "Production of intergeneric hybrid between Oryza sativa L", 60, pp.744~746 (1995)
- "Disease and insect resistance in rice", pp.265~341
- "Hybrid rice breeding in China Innovative Approaches to Rice Breeding"
- "Interspecific hybridization of cultivated rice O. sativa L. with the wild rice O. minuta Presl", pp.664~671 (1996)
- "Development of monosomic alien addition lines and introgression of genes from Oryza australiensis Domin to cultivated rice Oryza sativa L", pp.102~109
- "Phylogeny of rice genomes with emphasis on origins of allotetraploid species", 96, pp.14400~14405 (1999)
- "Diversity in the Oryza genus", pp.139~146 (2003)