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Different behavior of brassica juncea and brassica carinata as sources of phoma lingam resistance in experiments of interspecific transfer to brassica napus

, : Different behavior of brassica juncea and brassica carinata as sources of phoma lingam resistance in experiments of interspecific transfer to brassica napus. Plant Breeding 97(4): 304-314

With the aim to transfer Phoma lingam resistance into rape, successful interspecific crosses were between three oilseed rape varieties (Brassica napus) and the resistant species of B. juncea and B. carinata. Although both hybrid types of B. napus .times. B. juncea and B. napus .times. B. carinata showed the same high level of resistance as the respective resistant parent, the resistance could be only transferred from juncea crosses. After three backcross generations, lines morphologically undistinguishable from rape, fertile, and with a high degree of resistance were obtained. The resistance of B. carinata was practically lost in the first backcross. A possible explanation of this different behavior could be a higher recombination between the genomes B and C (juncea crosses) than between B and A (carinata crosses). The applied embryo culture increased the yield of hybrids and first backcross plants and reduced considerably the generation time.

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