b'Is there resistant germplasm out there? How can people best identify aphanomyces?Fortunately for us, some of our colleaguesAphanomyces euteiches is a newer patho-in the U.S. Pacific Northwest and ingen in the Prairie regions, but likely the France have been working on aphano- most damaging for pea, and this year we myces resistance in pea for more than 20are detecting it in around nearly 80% of Tomyears. Its a scenario where the diseaseSamiyasamples we receive. Symptoms of root Warkentin has been more prevalent in their regions,Fatima rot caused by Aphanomyces euiteiches in SRP Chair inbecause of wetter conditions and relativelyPlantpulses are:Pulse Croptight rotations. They worked together onDisease StuntingBreeding andthis and screened a lot of germplasm fromDiagnosticianYellowingGenetics various collections around the world.20/20 Seed Poor root growthUniversity ofThey found a few accessions that wereLabsLittle nodulationSaskatchewan partially resistant.Samiya has Browning of root area; caramelized Toms maina bachelorsroots are classic signs of aphanomyces focus is plantWhat sort of work are you doing in regard todegree ininfectionbreeding ofthis? biotechnology. pea cultivarsI am involved in research led by SabineSheWhat tests are available?for WesternBanniza, pulse crop pathologist at thebelieves that Pulse root rot test. Plant samples are Canada andCDC and her team, along with Kishoreagriculturesubmitted with roots intact. Root tissue is the northern- Gali, molecular biologist working withis one ofanalyzed visually, microscopically and later tier states,me on pea breeding. Weve been work- the mostplated to report the presence of four root as well asing over the last few years, with fundingimportantrot-causing pathogens. It is a seven-day researchfrom Saskatchewan Pulse Growers andindustries intest with quantitative results.related tothe Saskatchewan Ministry of Agriculture,the world and DNA test for plant tissue. Infected improvingtaking a molecular breeding approach toevery day sheplants are concentrated sources of the the pea cropaddress aphanomyces in pea. Weve takencan help makepathogen and represent a significant in termsthose partial resistance sources discoveredthe world aescalation in the amount of inoculum of diseaseby our French and U.S. colleagues andbetter placepresent in a field. Scout for suspect plants resistancecrossed those with our latest CDC peathrough herand submit fresh, frozen or dried roots for and end-usevarieties. Our plan is to take these intowork in seedtesting.quality. multi-location trials starting this comingtesting.DNA test for soil. For field soil, spring, to see how they look both from acollect the top 5-10 cm of A-horizon, or disease resistance point of view and fromless as depth allows, without taking any all the other points of view, in terms ofB-horizon. Collect in a W-shaped pattern theiryield potential, lodging resistance,at entrances to the field and other suspect maturity and seed quality, and all thespots (like low-lying areas, gardens, well/other traits that farmers would like to see.utility sites, soil clumps at entrances). Our thought is that the best of these couldSubmit a two-cup sample. go into variety registration trials in 2022 or Seed Test: Aphanomyces Root rot is 2023.not generally seedborne; if a seed sample is submitted, the soil attached to the seed When could a resistant variety hit theis tested, not the seed itself. market?A resistant variety could be released as early as 2025. Of course, seed must be multiplied by seed growers, probably for three years, so were now at 2028, per- Watch out latest webinar on this very topic!haps.Visit germination.ca/why-aphanomyces-is-becoming-a-bigger-threat/SUPPORTED BY: ENDORSED BY:36GERMINATION.CAJANUARY 2021'