ZC 9640A
1. ZC 9640A was selected for resistance to bacterial wilt, Fusariurn will Verticillium wilt, Phytophthora root rot, anthracnose (race 1), stem nematode, root lesion nematode and Aphanomyces, root rot (race 1) using phenotypic recurrent selection. Final selections were based on winter survival, degree of leafhopper bum, freedom from leaf diseases and fall dormancy reaction.
2. ZC 9640A appears to be adapted to the Great Plains, north central and east central regions of the U.S. It is intended for use in the Great Plains, north central and east central regions of the U.S. It has been tested in Kansas, Iowa, Illinois, Idaho, and Pennsylvania.
3. Fall dormancy of ZC 9640A is similar to Saranac the FD 4 check. Flower color of syn2 so generation is approximately 72%, purple, and 28% variegated with a trace of cream, yellow and white.
4. ZC 9640A has high resistance to bacterial wilt, Verticillium, wilt, Fusarium. wilt, anthracnose (race 1) and Phytophthora root rot, resistance to Aphanomyces root rot, pea aphid and root lesion nematode and low resistance to spotted alfalfa aphid and blue alfalfa aphid. It has not on been tested for reaction to root knot nematode.
5. Seed increase is limited to one generation each of breeder (syn1 ), foundation (syn2) and certified (syn3) seed classes. Certified seed may be produced from either breeder or foundation classes. A one, three and six year stand life is permitted on fields producing breeder, foundation and certified seed classes respectively. Foundation seed production is limited to the Pacific Northwest. Breeder seed was produced in 1996. ABI will maintain sufficient seed stocks for the fife of the variety.
6. Certified seed will be available in 2000.
7. Application will not be made for Plant Variety Protection.
8. This information can be forwarded to the PVP office.
9. Date submitted: November 1999
Experimental designations: ZC 9640A