AEC Mountaineer broadglumed wheatgrass

2001 ◽  
Vol 81 (4) ◽  
pp. 745-747 ◽  
Author(s):  
B. A. Darroch ◽  
S. N. Acharya ◽  
J. Woosaree

AEC Mountaineer broadglumed wheatgrass, Elymus trachycaulus subsp. violaceus (Horneman) A. & D. Love, is a cultivar developed for reclaiming and revegetating disturbed sites at high elevations. It is the first cultivar of broadglumed wheatgrass available in Canada. Its primary advantage over other subspecies of slender wheatgrass is its ability to grow rapidly and produce mature seed at elevations as high as 2300 m. Production of mature seed enables plants to propagate, thus increasing plant density and stand longevity in high stress, high elevation environments. Key words: Broadglumed wheatgrass, slender wheatgrass, Elymus trachycaulus, reclamation, cultivar description

1995 ◽  
Vol 75 (3) ◽  
pp. 699-701 ◽  
Author(s):  
B. A. Darroch ◽  
S. N. Acharya

AEC Highlander slender wheatgrass, Elymus trachycaulus (Link) Gould in Stunners subsp. trachycaulus, was developed for use in reclaiming and revegetating disturbed sites in the mountains and foothills of Alberta. Its primary advantage over other varieties is its ability to grow rapidly and produce mature seed in the short growing seasons found at higher elevations. Key words: Slender wheatgrass, Elymus trachycaulus, cultivar description, reclamation


1996 ◽  
Vol 76 (2) ◽  
pp. 349-351
Author(s):  
B. A. Darroch ◽  
S. N. Acharya

AEC Blueridge alpine bluegrass (Poa alpina L.) is a reclamation variety developed for use in reclaiming and revegetating disturbed sites at high elevations. It is the first variety of alpine bluegrass released in Canada. Its primary advantage over varieties of other bluegrass species is its ability to thrive under the harsh environmental conditions found at high elevations. Key words: Cultivar description, AEC Blueridge Alpine bluegrass


1996 ◽  
Vol 76 (2) ◽  
pp. 345-347 ◽  
Author(s):  
B. A. Darroch ◽  
S. N. Acharya

AEC Hillcrest awned slender wheatgrass [Elymus trachycaulus subsp. subsecundus (Link) Gould] is a reclamation variety developed for use in reclaiming and revegetating disturbed sites in the mountains and foothills of Alberta. It is the first variety of awned slender wheatgrass available in Canada. Key words: Awned wheatgrass, slender wheatgrass, Elymus trachycaulus, cultivar description, reclamation


2002 ◽  
Vol 82 (1) ◽  
pp. 95-98 ◽  
Author(s):  
B. A. Darroch ◽  
S. N. Acharya ◽  
J. Woosaree

AEC Glacier alpine bluegrass, Poa alpina L., is a reclamation cultivar developed for use in reclaiming and revegetating disturbed sites at high elevations. It is the second alpine bluegrass cultivar released by the Alberta Environmental Centre, Vegreville, AB. This cultivar is expected to complement a prior release, AEC Blueridge alpine bluegrass. AEC Glacier is adapted to high elevations where it is capable of rapid growth and seed production. Key words: Alpine bluegrass, Poa alpina, cultivar description, reclamation


Diversity ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 200
Author(s):  
Eric J. Gangloff ◽  
Sierra Spears ◽  
Laura Kouyoumdjian ◽  
Ciara Pettit ◽  
Fabien Aubret

Ectothermic animals living at high elevation often face interacting challenges, including temperature extremes, intense radiation, and hypoxia. While high-elevation specialists have developed strategies to withstand these constraints, the factors preventing downslope migration are not always well understood. As mean temperatures continue to rise and climate patterns become more extreme, such translocation may be a viable conservation strategy for some populations or species, yet the effects of novel conditions, such as relative hyperoxia, have not been well characterised. Our study examines the effect of downslope translocation on ectothermic thermal physiology and performance in Pyrenean rock lizards (Iberolacerta bonnali) from high elevation (2254 m above sea level). Specifically, we tested whether models of organismal performance developed from low-elevation species facing oxygen restriction (e.g., hierarchical mechanisms of thermal limitation hypothesis) can be applied to the opposite scenario, when high-elevation organisms face hyperoxia. Lizards were split into two treatment groups: one group was maintained at a high elevation (2877 m ASL) and the other group was transplanted to low elevation (432 m ASL). In support of hyperoxia representing a constraint, we found that lizards transplanted to the novel oxygen environment of low elevation exhibited decreased thermal preferences and that the thermal performance curve for sprint speed shifted, resulting in lower performance at high body temperatures. While the effects of hypoxia on thermal physiology are well-explored, few studies have examined the effects of hyperoxia in an ecological context. Our study suggests that high-elevation specialists may be hindered in such novel oxygen environments and thus constrained in their capacity for downslope migration.


1996 ◽  
Vol 76 (1) ◽  
pp. 165-167 ◽  
Author(s):  
W. D. Lane ◽  
R. A. MacDonald ◽  
K. O. Lapins ◽  
O. L. Lau

Sunrise apple (Malus domestica Borkh.) has firm, crisp fruit with bright attractive colour. It matures in mid-August. The tree is easily managed, but its fruit has a short shelf life. Key words: Apple, cultivar description


2006 ◽  
Vol 86 (2) ◽  
pp. 483-484 ◽  
Author(s):  
Elroy R. Cober ◽  
Harvey D. Voldeng ◽  
Judith A. Frégeau-Reid ◽  
Ronald J. D. Guillemette

DH3604 is a 2700 crop heat unit soybean [Glycine max (L.) Merr.] cultivar developed for natto soyfood production. Key words: Soybean, cultivar description, natto


1996 ◽  
Vol 76 (1) ◽  
pp. 151-152
Author(s):  
H. D. Voldeng ◽  
R. J. D. Guillemette ◽  
D. A. Leonard ◽  
E. R. Cober

AC Albatros is a 2500 crop heat unit soybean [Glycine max (L.) Merr.] cultivar with good yield potential. Key words: Soybean, cultivar description


2000 ◽  
Vol 90 (6) ◽  
pp. 621-628 ◽  
Author(s):  
Thinlay ◽  
R. S. Zeigler ◽  
M. R. Finckh

Thirty isolates of P. griseacollected from rice during a blast epidemic in 1995 in the high (1,800 to 2,600 m) and middle (1,200 to 1,800 m) elevations of Bhutan and 80 isolates collected from one rice cultivar from two high- and two mid-elevation sites in 1996 were analyzed for virulence. Differential varieties were indica CO39, with five near-isogenic lines (NILs) for resistance genes in the genetic background of CO39, and japonica Lijiangxintuanheigu (LTH), with five NILs for LTH. Twelve selected Bhutanese landraces also were studied. In addition, 10 blast nurseries consisting of the NIL sets, important local landraces, and representatives of international differential groups were established in the 1996 and 1997 growing seasons in the mid- and high-elevation agroecological zones. The 110 isolates were differentiated into 53 pathotypes based on the 2 NIL sets. Thirteen isolates were avirulent on all of the NILs but were compatible with some landraces. Several isolates were able to attack one of the NILs of CO39 but not CO39. These results strongly suggest that both CO39 and LTH possess previously unidentified resistance. The landraces were not uniform in their reactions to the isolates. When a reaction index taking into account all individual plant reactions was used, isolates that had been assigned to the same pathotype could be further differentiated, indicating that the NIL sets could not completely discriminate virulences in Bhutanese P. grisea populations. In the trap nurseries, disease was always present in the middle elevations, but disease was very low during July 1996 in the high elevations and only present during August and September 1997. Almost all varietal groups were more frequently attacked in the middle than in the high elevations, indicating that the virulence spectrum is wider and the conduciveness of the environment is greater in the middle elevations. Landraces from the high elevations were most susceptible, followed by international differential groups 7 and 8. The results suggest that selection has yielded landraces with more complete and complex resistance in the more disease-conducive mid-elevation environment. At the same time, the pathogen population also possesses a wider virulence spectrum in that environment.


2001 ◽  
Vol 81 (1) ◽  
pp. 75-76
Author(s):  
L. M. Reid ◽  
G. McDiarmid ◽  
A. J. Parker ◽  
R. I. Hamilton

CO429 is a short-season corn inbred line with good combining ability, average to superior lodging resistance in hybrids, and excellent emergence and early season vigour. Key words: Corn, maize, Zea mays, cultivar description


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