View Full Document

Marker Assisted Selection in Soybean



View the full content.
View Full Document
View Full Document

5 views

Unformatted text preview:

Marker Assisted Selection in Soybean Brian Diers University of Illinois Mike Lee states in Advances in Agronomy 1995 The challenges loom large for marker assisted selection MAS in many crops conventional selection has had several decades to evolve into a very effective technology Outline Overview of the soybean industry Marker assisted selection MAS in the private sector Experiences mining for new genes using MAS in my program Soybean cyst nematode SCN Aphid resistance Yield Intellectual property concerns Conclusions Take Home Messages MAS is being done in the private sector on a large scale Public breeders are using it successfully in discovery prebreeding and limited cultivar development Pick your trait well MAS is being used successfully for simply inherited traits defensive traits US Soybean Germplasm has a Narrow Base Breeders in North America are selecting within an narrow germplasm base 80 can be traced to 13 ancestral lines 50 of the northern US germplasm can be traced to 3 ancestral lines There are likely genes in plant introductions PIs that could be used to improve soybean yield and other traits The germplasm collection in Urbana contains over 18 000 PIs 3000 44 6 2500 37 2 2000 29 7 1500 22 3 1000 14 9 500 1920 1930 1940 1950 1960 1970 Production Year LIN b 22 6kg ha or 0 337bu ac R2 0 934 1980 1990 EXP b 0 01464 R2 0 927 From Specht et al Crop Sci 39 1560 1570 7 4 2000 Seed Yield bu ac Seed Yield kg ha USA Soybean Yield Trend 1924 2000 Soybean Cultivars Purchased by Farmers are Mostly From Private Industry Acres of Certified Seed Produced of Public Cultivars in Illinois 250000 200000 Acres In the Midwest less than 5 of the acreage is planted to public cultivars Over 90 of the acreage is planted to Roundup Ready cultivars Reduced emphasis of cultivar development in the public sector 150000 100000 50000 0 1975 1980 1985 1990 Year 1995 2000 MAS in soybean is being done on an industrial scale in private industry MAS in Private Sector Monsanto and Pioneer



Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Marker Assisted Selection in Soybean and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Marker Assisted Selection in Soybean and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?