Interspecific crosses between some Brassica species and Brassica napus L. Genome analysis of the hybrids and possibilities of obtaining male sterility in swede rape

Rousselle, P.; Eber, F.

Agronomie 3(2): 153-159


ISSN/ISBN: 0249-5627
Accession: 001092012

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Reciprocal crosses were carried out between B. napus 'Cresor' on the one hand and lines or varieties of B. campestris, B. nigra, B. juncea and B. carinata on the other. The F2s were obtained by open pollination of the F1 within each cross. The F1s were obtained by in vitro culture of the immature embryos. In the F1 from the crosses with B. campestris, meiosis was regular; in the F1 from crosses with B. carinata and B. juncea, some plants had irregular meiosis. In the F2 from B. nigra X B. napus, two of the three plants analysed were 75% pollen sterile; the third was 14.4% pollen sterile. Two F2 plants from B. campestris X B. napus were 75% pollen sterile but mean pollen sterility was 24.7%. In the F2 from B. carinata X B. napus, pollen sterility ranged from 14.3% to total in two plants without stamens. The cross B. juncea X B. napus gave the most F2 plants, and pollen sterility ranged from 10-20% in five plants to 90-100% in two plants. It is considered that the range of pollen fertility observed in all the crosses except that involving B. campestris offers scope for finding cytoplasmically male-sterile material.