Registration of ‘Doyce’ Hulless Barley

Abstract

Registration of 'Oklee' Wheat relatively early maturing and produces spikes 1.3 d earlier 'Oklee' is a hard red spring wheat (Triticum aestivum L.) than 2375 and 0.6 d earlier than Oxen (PI 596770), the most (Reg. no. CV-963, PI 634553) developed and released by the widely grown cultivar in Minnesota since the late 1990s. Oklee Minnesota Agricultural Experiment Station in cooperation is a semidwarf cultivar and averages 75 cm, the same height with USDA-ARS in January 2003. It was named after a town as Oxen, and is 3 cm shorter than 2375 in Minnesota trials. in its region of adaptation in northwest Minnesota. Oklee was In 35 Minnesota trials conducted from 1998 through 2002, released on the basis of its high grain yield, high grain volume Oklee yielded 3664 kg ha Ϫ1 compared to 3482 kg ha Ϫ1 for weight, high grain protein content, and early maturity. In addi-2375 and 3825 kg ha Ϫ1 for Oxen. Oklee was evaluated in tion, Oklee has moderate resistance to Fusarium head blight 29 environments in the Uniform Regional Hard Red Spring (FHB, caused primarily by Fusarium graminearum Schwabe). Wheat Nursery in 1998 and 1999 and yielded an average of Oklee was derived from the cross '2375'/SBF0670, made 3456 kg ha Ϫ1 compared to an average of 3470 and 3503 kg by the former Pioneer Hi-Bred spring wheat breeding program ha Ϫ1 produced by the check cultivars, 2375 and Verde (PI in the USA. The cultivar 2375 (PI 601477, syn. Pioneer 2375) 592561, Busch et al., 1996), respectively. Oklee has moderately has the pedigree Olaf//Era/Suqamuxi 68/3/Chris/ND487//Lark strong straw and a lodging rating of 2.3 when scored on a and was widely grown in Minnesota during the mid-1990s due scale of 0 (erect) to 9 (lodged) in 21 environments at which to its moderate resistance to FHB. SBF0670 is an unreleased lodging occurred from 1998 thru 2002. By comparison, the line whose pedigree contains hard red spring lines once promicultivars 2375, Oxen, and Verde had lodging ratings of 3.5, nent in the region including 'Chris' (CItr 13751, Heiner and 2.6, and 2.1, respectively. Johnston, 1967), 'Era' (CItr 13986, Heiner and McVey, 1971), Oklee has moderate resistance to FHB in misted, inoculated and 'Butte'. field nurseries, similar to the resistance of 2375. In 11 FHB The F 2 population producing Oklee was selected for leaf nurseries from 1998 through 2001, Oklee averaged 23.6% disrust (caused by Puccinia triticina Eriks.) and stem rust (caused eased spikelets, 16.7% visually scabby kernels (VSK), and by Puccinia graminis Pers.: Pers.) resistance in a field planting 8.8 mg kg Ϫ1 of the mycotoxin deoxynivalenol (DON). The at St. Paul in 1993. The F 3 generation was advanced by single cultivar 2375 averaged 22.7% diseased spikelets, 17.5% VSK, seed descent in a greenhouse. The selection resulting in Oklee and 9.8 mg kg Ϫ1 DON. In the same trials, the resistant check was selected from a single plant in an F 4 headrow in 1994 and 'BacUp' (PI 596533, Busch et al., 1998) and the susceptible this seed was increased in a winter nursery in Arizona during check ...

Registration of ‘Buck’ Naked Barley

“…Strider is a six‐row, covered feed barley released by the Oregon Agricultural Experiment Station in 1997. Doyce is a six‐row, naked feed barley with winter growth habit, released by the Virginia Agricultural Experiment Station (Brooks et al, 2005).…”

Yield Potential of Hulless Versus Hulled Full‐Sib Genotypes in Four Winter Barley Populations

“…Doyce (PI 634932) was the first hulless cultivar developed by the Virginia Tech barley breeding program and represented the highest yield potential for hulless barley at the time of its release in 2003 (Brooks et al, 2005c). Doyce (PI 634932) was the first hulless cultivar developed by the Virginia Tech barley breeding program and represented the highest yield potential for hulless barley at the time of its release in 2003 (Brooks et al, 2005c).…”

“…In a review of western Canadian barley cultivars released from 1910 to 1987, the authors concluded that yield improvement was associated with increased harvest indices and reduced lodging rather than to a change in specific yield components ( Jedel and Helm, 1994). Additional information for barley cultivars used to develop these populations can be found in the following citations: Jensen (1964aJensen ( , 1964b, Caldwell et al (1966), Finker et al (1968, Starling et al (1970Starling et al ( , 1973, Graham et al (1982), and Brooks et al (2005aBrooks et al ( , 2005bBrooks et al ( , 2005c. Rasmusson and Cannell (1970) demonstrated that spikes per square meter was consistently associated with yield while the effectiveness of selection for kernel weight and VA93-42-57 were derived from a series of crosses comprising CI 9623, CI 9658, CI 9708, barley yellow dwarf virus-resistant 'Atlas'/'Hanover' (CI 13197), or 'Rapidan' (CI 14006)/4/'Harrison' (CIho 10667)/3/Cebada Capa/Wong//awnleted selection of Hudson/5/'Barsoy' (CI 11904).…”

Hulless Barley Response to Ethephon Application

“…Breeding efforts are focused on improving these traits. Current releases and experimental lines offer higher yield, higher test weight, and better dehulling than those previously available (2).…”