Abstract
An F1 hybrid between the two cultivated rice species Oryza glaberrima and O. sativa spp. japonica was pollinated by four different O. sativa genotypes to obtain four back-cross progenies with 9–36 plants each. These progenies were followed for genetic marker segregations. Segregation distortions were demonstrated at several loci. Preferential allele associations were detected. Some distortions could be explained by the sterility of the female gametes of the F1 hybrid caused by a sporogametophytic interaction gene, while an early differential zygotic selection could be the origin of the other distortions.
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