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Lethbridge Herald Newspaper Archives

- Page 27

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Lethbridge Herald, The (Newspaper) - June 26, 1973, Lethbridge, Alberta -Tuesday, 24. H8RAID streak mosaic research lution to aid winter production DR. T. G. ATKINSON .ethbridge Research Station i major problem in the prp- rtion of winter wheat in tthcrn Alberta will be over- lie if Lethbridge Research .lion scientists are success- in developing varieties re- tant to wheat streak mosaic. STO resistance to this rtestruc- e virus disease or to ll'e tiny hert curl mite" that spreads las ever been found in wheat. the Lettibridge Research ition we are attempting to ithe-ize a resistant wheat va- ty by transferring the de- ed characteristics from a tanlly related grass Working together, a plant bho'oaist and a wheat cyto- neticist selected from cross- between wheat and tall teat grass a hybrid that was sistanl to the disease even ten the virus was rubbed into leaves. This hybrid is also jhly resistant to the wheat rl mite. It is fully fertile, and wheat-like in ovHii habit although its head d kernels show some grass aract eristics. Resistant Cylologioal tests on this inter- t.. KAV.A rec of its 21 pairs of e'nromo- me.-, come from the grass ircnt while the other 18 are >m wheat. Two of the three iromosomes from the grass e imolved in resistance to the rus. and one ot these carries sislauce to the mite. The ird grass chromosoms is not vo'ied in either kind of resis- ncc TV nevt step in deve'oping a heal streak mosaic-resistant iriety requires transferring e virus resistance or mite re- slan-o from the grass chro- oscmes to the wheat without tming the undesired grass aiti transloeat ions >ve been achieved by others resistance to t'isease. Pre'ent control of wheat mosaic depends on pre- jntmg the infection of winter heat in the fall by making ire that no potential sources di-crse carrying mites are when the new crop em- rges Tliis requires that the -op be seeded only after wing w-lieat and barley are v a t u r e and after volunteer rowth has been destroyed. 'armer stockmen who use ste-sown cereals for fall pas- ire must also avoid the use of r o p s susceptible to wheat break mosaic. Still green In years, spring sown ereals mature late and are till green at the usual seeding late for winter wheat. Some- imes too, cultivating-out vol- ttiteer growth runs contrary to he need to maintain a soil on summer fallowed ields during the last half of Au- [ust and early September for of pale western cut- Although the winter wheat woducers in Southern Alberta generally follow the reconv nended cultural control mea- sures, the carelessness of an un- iformed or indifferent neigh- bor often frustrates the efforts rf the most conscientious grow- srs. Resistant varieties would prevent the serious losses sometimes caused by wheat streak mosaic and thereby give winter wheat growers more flexibility in their cropping practices. GENERAL PAINT AND WALL COVERINGS CHARGEX STORE HOURS: MONDAY TO FRIDAY A.M. TO P.M. SATURDAYS A.M. TO P.M. INTERIOR I EXTERIOR ENDS JULY 7th GENERAL PAINT 32-010 HOUSE TRIM PAINT WHITE CHOOSE FROM HUNDREDS OF CUSTOM COLORS IN GENERAL PAINT'S BEST QUALITY FINISHES BUY NOW! NEW LOCATION Our new, large and unique branch is in the sama 1000 block 3rd Avenue ot 1020 3rd Ave. Next to Cable vision across from CJOC Radio PHONE 328-9221 or 328-9222 FREE CUSTOMER PARKING! Featuring the above Premium Paint Values as well DON'S BUILDING SUPPLIES Highway No. 3 East, Lethbridge (Next to Husky Bulk OH) Phone 328-3535 ;