Unity hard red spring wheat

Abstract

Niziol, D. 2010. Unity hard red spring wheat. Can. J. Plant Sci. 90: 71Á78. Unity is a hard red spring wheat that meets the end-use quality specifications of the Canada Western Red Spring class. Unity is the first spring wheat cultivar registered in Canada that contains the antibiosis resistance gene Sm1, which produces a product that reduces the palatability of developing seeds to wheat midge larvae (Sitodiplosis mosellana Ge´hin). Unity is a partial backcross derivative of McKenzie, using Clark as the donor of the Sm1 gene for midge resistance. Unity was found to be adapted to the eastern wheat growing regions of the Canadian prairies as represented in the Central Bread Wheat Cooperative Registration Test in 2004, 2005 and 2006. For registration testing, the performance of Unity was estimated using the varietal blend Unity VB, which consisted of 90% Unity and 10% Waskada. In comparison to the check cultivars (Katepwa, McKenzie, CDC Teal, AC Barrie, and Superb), Unity was the highest yielding cultivar overall; although not significant, Unity was 5% higher yielding than McKenzie. Unity matured significantly later than Katepwa and significantly earlier than Superb. Unity had significantly shorter plant stature than Katepwa and significantly taller stature than Superb. Unity had significantly greater lodging scores than AC Barrie and Superb. The test weight of Unity was significantly higher than the best check: 0.9 kg hL(1 higher than McKenzie. Unity expressed resistance to leaf rust, stem rust and common bunt, intermediate resistance to loose smut, and susceptibility to fusarium head blight. Unity had preharvest sprouting resistance with an overall sprouting score similar to the best checks McKenzie and Superb. Unity also maintained its falling numbers following natural or artificial weathering of spikes. The end-use suitability attributes of Unity were similar to the recurrent parent McKenzie for all traits except amylograph viscosity which was significantly higher than all checks except Superb. Unity est une varie´te´de ble´roux vitreux de printemps qui respecte les spe´cifications de la cate´gorie Ble´roux de printemps de l'Ouest canadien pour la qualite´eu e´gard a`l'usage final. Unity est le premier cultivar de ble´de printemps homologue´au Canada a`porter le ge`ne de re´sistance a`l'antibiose Sm1, qui rend les semences en de´veloppement moins appe´tibles aux larves de la ce´cidomyie du ble( Sitodiplosis mosellana Ge´hin). Unity de´rive du re´trocroisement partiel de la varie´te´McKenzie, le cultivar Clark ayant servi de source au ge`ne Sm1 de re´sistance a`la ce´cidomyie. Unity est adapte´aux re´gions de l'est des Prairies canadiennes ou`l'on cultive le ble´, comme l'ont indique´les essais d'homologation de la Central Bread Wheat Cooperative en 2004, 2005 et 2006. Lors de ces essais, le rendement de Unity a e´te´estime´avec le me´lange varie´tal Unity VB, compose´a`90 % de Unity et a1 0 % de Waskada. Unity a enregistre´un rendement plus e´leve´que celui des cultivars te´moins (Katepwa, McKenzie, CDC Teal...

Population Structure and Genomewide Association Analysis of Resistance to Disease and Insensitivity to Ptr Toxins in Canadian Spring Wheat Using 90K SNP Array

“…For instance, McKenzie is the backcross parent of Unity (Fox et al, 2010), Superb is one of the parents of CDC Abound (McCallum and DePauw, 2008), and AC Crystal and AC Taber are sibs (Fernandez et al, 1998). Six pairs of cultivars, however, only differed by £5% of the total number of alleles, which was due to shared pedigree relationships.…”

Application of molecular markers to wheat breeding in Canada

“…‘Unity’ (Fox et al. ), which incorporates Sm1 , was the first CWRS cultivar and was registered in 2007. Using MAB, the Sm1 gene was incorporated into ‘Goodeve’ (DePauw et al.…”

Evaluation of Alternative Planting Strategies to Reduce Wheat Stem Sawfly (Hymenoptera: Cephidae) Damage to Spring Wheat in the Northern Great Plains

“…Wheat cultivar blends are routinely used in Kansas to achieve yield stability by combining cultivars with compatible maturity and market class attributes but that vary in complementary strengths (Bowden et al 2001). To minimize retention of virulent mutants, the Þrst wheat cultivar resistant to wheat midge, Sitodiplosis mosellana Gé hin, will be blended with a susceptible cultivar to create a refugia of 10% susceptible plants (Fox et al 2009). Our results indicate potential for blending cultivars of the same market class that have compatible growing degree-day requirements as reduced business risk occurred through similar or higher yield and improved grade retention.…”