Abstract
Pollen germination and pollen tube growth were studied in the cross Erucastrum abyssinicum × Brassica oleracea. 25 per cent ovules showed pollen tube entry into the micropyle 5 days after pollination. Embryos did not grow beyond the globular or heart-shaped stage. Thus post-fertilization barriers prevent hybridization in this cross. Sequential culture of ovaries and ovules 10 days after pollination helped rescue globular embryos. Three hybrids were obtained. All the hybrids flowered in vitro. Pollen fertility was 6.5 per cent. Leaf esterase and peroxidase isozymes confirmed the hybrid nature. Meiotic metaphase in the pollen mother cells showed 25 chromosomes. The presence of up to 9 bivalents and a quadrivalent indicates high homology between the two genera. The intergeneric hybrids have been multiplied using nodal segment culture. They are a source for obtaining cms cole crops and widening the gene pool of B. oleracea.
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Sarmah, B., Sarla, N. Erucastrum abyssinicum × Brassica oleracea hybrids obtained by ovary and ovule culture. Euphytica 102, 37–45 (1998). https://doi.org/10.1023/A:1018384502884
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DOI: https://doi.org/10.1023/A:1018384502884