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WWW.POTATOGROWER.COM 69 • Broad spectrum, non-selec ve control of post-emergent weeds • Over 10 years of grower and university proven efficacy • Excellent tool in IPM programs to help break chemical resistance • No MRLs or pre-harvest interval • Non-vola le, emulsifiable concentrate FOR ORGANIC PRODUCTION HERBICIDE EC HERBICIDE EC HERBICIDE EC ® FOR ORGANIC PRODUCTION HERBICIDE EC A Fast & Effective Organic Herbicide You Can Trust Approved for Desiccation in Potatoes Contact Shaun Lough to learn more: (509) 669-7600 • slough@westbridge.com ® www.westbridge.com 4096-8WestbridgeAgProducts13s.indd 1 4096-8WestbridgeAgProducts13s.indd 1 11/15/21 11:08 AM 11/15/21 11:08 AM GENTLE: Separates without damaging peaches, apples, mushrooms and fresh tomatoes. ACCURATE: Precisely grades grape tomatoes, cherries, nuts, and small berries, maintaining that accuracy for larger products including cantaloupes and pineapple. FAST: Thirteen standard models custom-designed to meet your needs sort from 1000 lb/hr to 100,000 lb/hr. SIMPLE: Effective but simple design provides a rugged, low cost, low maintenance machine at a high value to our customers. It can even be used in the field! VERSATILE: Specialized rollers allow for the accurate sizing of round products (potatoes, onions and citrus), long products (carrots, russets, and cucumbers), and irregular products (bell peppers, jalapenos, and garlic). Proven in use for: Round Potatoes, Russets, Goldrush, Reds, Sweet Potatoes, Fingerlings, and more. KERIAN MACHINES INC. 1709 Hwy 81 S PO Box 311 Grafton, ND 58237 Phone 701-352-0480 Fax 701-352-3776 Website: www.kerian.com Email: sales@kerian.com 158542KerMac13.indd 1 1/7/16 1:27 PM polyploidy, and potato isn't the only crop to have multiple gene copies. Having four copies of each gene can make potato genetics complicated, according to Kaiser. "Each of the four copies can be a different version of the gene," she says. One way around the four-copies problem is to use potato varieties that naturally only have two copies of each gene. Humans, like most animals, have two copies of every gene—one each from male and female parents—a trait known as diploidy. But many diploid potato varieties are self-incompatible. "This means that a plant will not set fruit and seed when a flower is pollinated with its own pollen," says Kaiser. This reproductive barrier makes breeding very challenging. Kaiser and her team developed self- compatible diploid potatoes. Through this process, Kaiser and her team discovered that multiple genes and the environment determine whether some potatoes can produce self-fruit and seed. The new potato varieties and genetic tools will allow researchers to "examine the genetic foundations of self-fertility and insect and disease resistance," says Kaiser. "This way, we can create new potato varieties that were previously infeasible." Researchers at Michigan State University extended this research in field trials this past summer. "We will screen new potato varieties for individuals that have good tuber characteristics along with beetle resistance," says Kaiser. PG Researcher Natalie Kaiser crossbreeding potatoes in the greenhouse. Photo by Natalie Kaiser