Description:
CMS GIG2 originated from a single male-sterile plant among progenies of wild H. giganteus L. accessions 1934 (PI 503250) crossed with HA 89. is BC6F3 bulks with the pedigree of H. giganteus/7*HA 89/3/H. giganteus/6* HA 89//H. maximiliani 1631 (amphiploid). BC6F3. All plants from BC1 to BC6 of H. giganteus/HA 89 were male-sterile. indicating the existence of male-sterile cytoplasm in H. giganteus 1934. designated as CMS GIG2. CMS GIG2 has the genotype of rf4rf4Rvrv with normal plant vigor.