DNA sequence imparting cytoplasmic male sterility, mitochondrial genome, nuclear genome, mitochondria and plant containing said sequence and process for the preparation of hybrids
US5789566A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12Q1/6895
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
Ogura sterility DNA is used to develop agronomically valuable hybrids that lack the undesirable features of plants having Ogura DNA (chlorosis at low temperature; poor fertile fertility; aberrant flower morphology) but still impart efficient male sterility (which can be easily restored). Ogura sterility 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. Also disclosed are recombinant plant nuclear and mitochondrial genomes containing a DNA sequence defined by nucleotides 928-1569 of the specified sequence (or its homologous); cytoplasm containing such a mitochondrial genome; Brassica plants or hybrids containing the sterility DNA; and, DNA probes of at least 10 bases from the 928-1569 sequences. DNA probes are used to detect male sterility and for selecting clones without the need for lengthy agronomic/rehybridization steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.