Home News Livestock Crops Markets Hay, Range & Pasture Home & Family Classifieds Resources This Week's Journal
Agro-Culture Liquid Fertilizer



Farm Survey


AgriMartin
Journal Getaways


Reader Comment:
by Greater Franklin County

"Thanks for picking up the story about our Buy One Product Local campaign --- we're"....Read the story...
Join other discussions.

Research could help cut costs for producers

A new russet potato germplasm line developed by Agricultural Research Service scientists and collaborators could help cut the cost of using chemical fumigants to fight Columbia root-knot nematodes.

The wormlike pests are problematic in the Pacific Northwest, where two-thirds of America's potatoes are grown, as well as in Florida. Although fumigating the soil before planting time diminishes the pest's numbers, the practice isn't cheap, with some chemicals costing $300 per acre. Beneficial, soil-dwelling insects can also be harmed, according to geneticist Chuck Brown, with the ARS Vegetable and Forage Crops Research Unit in Prosser, Wash.

Thanks to genetic resistance, the new russet potato, PA99N82-4, offers a way to naturally protect the roots and tubers against nematode feeding. Putting that resistance to work hasn't been easy, though.

Brown and colleagues conducted painstaking screening of material from Solanum bulbocastanum and other wild species kept at the ARS U.S. Potato Genebank in Sturgeon Bay, Wis. Because wild and cultivated potatoes are chromosomally incompatible, the researchers resorted to bridging, a technique that fused S. bulbocastanum and domesticated potato cells together, which forced the DNA of both to combine. The cells were then stimulated to become plantlets. Later, "backcrossing" was used to eliminate unwanted traits (like tiny tubers and poor taste) from CRN-resistant plants that the researchers had created.

They also used DNA marker technology to identify plants harboring the S. bulbocastanum gene for resistance, namely RMc1(blb). Normally, resistance levels are determined by inoculating potted plants with nematodes, waiting seven weeks and removing and washing the roots so the pests' eggs can be counted. Use of DNA marker streamlines this process and identifies resistant plants in one day, according to Brown.

PA99N82-4 will undergo two more years of field-testing before it is released for use in developing commercial varieties.

Read more about the research in the April 2009 issue of Agricultural Research magazine, available online at www.ars.usda.gov/is/AR/archive/apr09/potato0409.htm.

ARS is the principal intramural scientific research agency of the U.S. Department of Agriculture.



Google
 
Web hpj.com

Copyright 1995-2014.  High Plains Publishers, Inc.  All rights reserved.  Any republishing of these pages, including electronic reproduction of the editorial archives or classified advertising, is strictly prohibited. If you have questions or comments you can reach us at
High Plains Journal 1500 E. Wyatt Earp Blvd., P.O. Box 760, Dodge City, KS 67801 or call 1-800-452-7171. Email: webmaster@hpj.com

 

Archives Search







Inside Futures

Editorial Archives

Browse Archives