|
CW 58073 |
|
1. CW 58073 is a
synthetic variety with 209 parent that were selected for Phytophthora
root rot and anthracnose from crosses between selections from 4 year old
California yield trials and selections from 3 year old California
selection nurseries. Nursery plants were selected from various
populations which were developed by a combination of phenotypic
recurrent selection and strain crossing with selection for resistance to
one or more of the following pests: Fusarium wilt, Verticillium wilt,
Phytophthora root rot, anthracnose (race 1), spotted alfalfa aphid, blue
alfalfa aphid, and stem nematode. Parentage of CW 58073 traces to DK
189, WestStar, and miscellaneous Cal/West Seeds breeding populations.
Approximate germplasm source contributions are as follows: M. varia
(5%), Turkistan (18%), Flemish (7%), Chilean (8%), Peruvian (4%), Indian
(21%), African (33%), and Unknown (4%). 2. CW 58073 is adapted
to and intended for use in the Southwest area of the U.S. and Argentina.
CW 58073 bas been tested in California and Argentina. 3. CW 58073 is a
nondormant variety with fall dormancy similar to FD class 8 check
varieties. Flower color observed in the Syn. 2 generation is greater
than 99% purple with a trace of variegated, white, cream, and yellow. 4. CW 58073 bas high resistance to anthracnose (race 1), Fusarium wilt, Phytophthora root rot, pea aphid, spotted alfalfa aphid, blue alfalfa aphid, stem nematode, northern root knot nematode (Meloidogyne hapla), and southern root knot nematode (Meloidogyne incognita), with resistance to Verticillium wilt, and moderate resistance to bacterial wilt. Reaction to Aphanomyces root rot (race 1) has not been adequately tested. 5. Seed increase of CW
58073 is on a limited generation basis with one generation of breeder
and two generations of the foundation and certified seed classes.
Breeder (Syn. l), foundation (Syn. 2 or Syn. 3), and certified (Syn. 3
or Syn. 4) classes will be recognized. Production of Syn. 3 foundation
seed requires consent of the breeder. Breeder seed was produced under
cage isolation near Woodland, California in 1995. Sufficient foundation
seed for the projected life of the variety will be maintained by
Cal/West Seeds. Stands of foundation and certified seed fields are
limited to 3 and 6 years, respectively. 6. Certified seed of CW
58073 will be available in 2003. 7. No decision bas been
made regarding Plant Variety Protection. 8. This information can
be forwarded to the PVP office. 9. Variety Name:
____________________
Date submitted: November 30, 2003. Experimental Designation: CW 58073. |