DNA sequence conferring a male cytoplasmic sterility, mitochondrial genome, cell nuclear genome, mitochondrial and plant containing this sequence, and method of producing hybrids

摘要

Ogura sterility DNA (I) is carried by a DNA sequence defined by nucleotides 928-2273 of a 2428 base sequence reproduced in the specification. When present in mitochondrial or nuclear genome of a plant it confers cytoplasmic male sterility (CMS). Also included are sequences with at least 50% homology with (I). Also new are (1) recombinant plant nuclear and mitochrondrial genome contg. a DNA sequence defined by nucleotides 928-1569 of the specified sequence (or its homologues); (2) cytoplasm contg. sucha as mitochrondrial genome; (3) Brassica plants or hybrids contg. (I); (4) DNA probes of at least 10 bases form the 928-1569 sequences.