ZC 9544
  1. ZC 9544 is a 173 clone synthetic cultivar. Parent clones trace to 76 populations selected for resistance to the following pests: bacterial wilt, Fusarium wilt, Verticillium wilt, Phytophthora root rot, anthracnose (race 1) and Aphanomyces root rot (race 1). Phenotypic recurrent selection was used. Final selections were made from two-year old space plant selection nurseries near Napier, IA, Livingston and Marshfield, WI based on yield, winter survival, degree of leafhopper yellowing and stunting, freedom from leaf diseases, and fall dormancy reaction.  Breeder seed (Syn 1) was produced in 1995 on approximately 25 cuttings of each clone transplanted at random and harvested in bulk.  Parentage traces to ABI 9042 (12%), AP 8939, GH 755 and 2444 (10% each), Avalanche, TMF Generation, AP 8630, AP 8835, ABI 9134, Prism, AP 8931, Rustler II, ABI 9131, ABI 9135, ABI 9129, ABI 9133, ABI 9142, Accolade, Class, Encore, Jewel, and Achieva (3% each) with 4% from numerous other sources.  Estimated % germplasm sources contributing to the genetic constitution of this variety.
M. falcata
Ladak
M. varia
Turkistan
Flemish
Chilean
4
5
20
14
44
6
Peruvian
Indian
African
Arabian
Unknown
  
7
          

  2. ZC 9544 appears to be adapted to the North Central and East Central regions of the U.S.. It is intended for use in the North Central and East Central regions of the U.S.. It has been tested in Iowa, Wisconsin and Illinois.

3. Fall dormancy of ZC 9544 is similar to Saranac. Flower color of Syn 2 generations is approximately 74% purple and 26% variegated with a trace of cream, yellow and white.

4. ZC 9544 has high resistance to bacterial wilt, Verticillium wilt, Fusarium wilt, anthracnose (race 1) and Phytophthora root rot, resistance to Aphanomyces root rot (race 1), moderate resistance to pea aphid and blue alfalfa aphid and low resistance to spotted alfalfa aphid. It has not been tested for reaction to stem nematode and root knot nematode.

5. Seed increase is limited to one generation each of breeder (Syn 1), foundation (Syn 2) and certified (Syn 3) seed classes. Certified seed may be produced from either breeder or foundation classes. A 2, 3 and 6 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 1995. ABI will maintain sufficient seed stocks for the life of the variety.

             6. Certified seed will be available in 1999.

            7. Plant Variety Protection will not be applied for.

            8. This information can be forwarded to the PVP office.

            9. Variety Name: Date Submitted: November 1998

            Experimental designations: ZC 9544
 
 
 
 
 
 
 
 

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