Inheritance and linkage of allozymes in seed tissue of whitebark pine

1986 ◽  
Vol 28 (4) ◽  
pp. 601-604 ◽  
Author(s):  
Glenn R. Furnier ◽  
Peggy Knowles ◽  
Mary A. Aleksiuk ◽  
Bruce P. Dancik
Keyword(s):  
Segregation Ratio ◽  
Pinus Albicaulis ◽  
Whitebark Pine ◽  
Enzyme Systems ◽  
Linkage Information ◽  
Haploid Megagametophyte ◽  
Significant Linkage

Allozyme variants were examined for 12 enzyme systems in haploid megagametophyte tissue of whitebark pine (Pinus albicaulis Engelm.). Inheritance and linkage information is reported for 11 loci (Aat-3, Aco, Adh, Fle-2, Idh, Mdh-2, Mdh-3, Mdh-4, Mdr, Pgi-2, and Pgm-2). Deviations from a 1:1 segregation ratio were observed at Fle-2, Pgi-2, and between two of the three alleles at Mdh-4. Significant linkage was observed for two pairs of loci (Aco–Fle-2 and Adh–Pgi-2), but estimates of recombination frequencies were relatively high.Key words: Pinus albicaulis, isozymes.

Inheritance and linkage relationships of some isozymes of black spruce in New Brunswick

1985 ◽  
Vol 15 (5) ◽  
pp. 992-996 ◽  
Author(s):  
T. J. B. Boyle ◽  
E. K. Morgenstern
Keyword(s):  
Linkage Analysis ◽  
New Brunswick ◽  
Gel Electrophoresis ◽  
Black Spruce ◽  
Segregation Ratio ◽  
Pairwise Comparisons ◽  
Enzyme Systems ◽  
Independent Segregation ◽  
Haploid Megagametophyte ◽  
Linkage Relationships

Thirteen polymorphic loci from eleven enzyme systems in black spruce (Piceamariana (Mill.) B.S.P.) were studied by gel electrophoresis using embryos and haploid megagametophyte tissue. Two loci (Mdh-1 and Sdh) showed deviations from the expected 1:1 segregation ratio of megagametophytes from heterozygous maternal plants that were significant at the 1 % level and a third (Aat) at the 5% level. Of the 78 possible pairwise comparisons for the linkage analysis, 58 could be tested for jointly independent segregation. Linkage could be detected between three pairs of loci: Aat–Pgi, Gdh–Idh, and Fum–Pgm.

scholarly journals FINE-SCALE GENETIC STRUCTURE OF WHITEBARK PINE (PINUS ALBICAULIS): ASSOCIATIONS WITH WATERSHED AND GROWTH FORM

Evolution ◽  
1999 ◽  
Vol 53 (1) ◽  
pp. 74-90 ◽  
Author(s):  
Deborah L. Rogers ◽  
Constance I. Millar ◽  
Robert D. Westfall
Keyword(s):  
Genetic Structure ◽  
Growth Form ◽  
Pinus Albicaulis ◽  
Fine Scale ◽  
Whitebark Pine

Modelling stand dynamics in whitebark pine (Pinus albicaulis) forests

1990 ◽  
Vol 51 (1-2) ◽  
pp. 73-95 ◽  
Author(s):  
Robert E. Keane ◽  
Stephen F. Arno ◽  
James K. Brown ◽  
Diana F. Tomback
Keyword(s):  
Stand Dynamics ◽  
Pinus Albicaulis ◽  
Whitebark Pine

scholarly journals A Comparison of Fire Regimes and Stand Dynamics in Whitebark Pine (Pinus albicaulis) Communities in the Greater Yellowstone Ecosystem

2003 ◽  
Vol 27 ◽  
pp. 123-128
Author(s):  
William Romme ◽  
James Walsh
Keyword(s):  
Yellowstone National Park ◽  
National Park ◽  
Fire Regime ◽  
Fire Regimes ◽  
Greater Yellowstone Ecosystem ◽  
Past Century ◽  
Grizzly Bear ◽  
Pinus Albicaulis ◽  
Whitebark Pine ◽  
Greater Yellowstone

Whitebark pine (Pinus albicaulis) is a keystone species of upper subalpine ecosystems (Tomback et al. 2001), and is especially important in the high-elevation ecosystems of the northern Rocky Mountains (Arno and Hoff 1989). Its seeds are an essential food source for the endangered grizzly bear (Ursus arctos horribilis), particularly in the autumn, prior to winter denning (Mattson and Jonkel 1990, Mattson and Reinhart 1990, Mattson et al. 1992). In the Greater Yellowstone Ecosystem (GYE), biologists have concluded that the fate of grizzlies is intrinsically linked to the health of the whitebark pine communities found in and around Yellowstone National Park (YNP) (Mattson and Merrill 2002). Over the past century, however, whitebark pine has severely declined throughout much of its range as a result of an introduced fungus, white pine blister rust (Cronartium ribicola) (Hoff and Hagle 1990, Smith and Hoffman 2000, McDonald and Hoff 2001), native pine beetle (Dendroctonus ponderosae) infestations (Bartos and Gibson 1990, Kendall and Keane 2001), and, perhaps in some locations, successional replacement related to fire exclusion and fire suppression (Amo 2001). The most common historical whitebark pine ftre regimes are "stand-replacement", and "mixed­ severity" regimes (Morgan et al. 1994, Arno 2000, Arno and Allison-Bunnell2002). In the GYE, mixed-severity ftre regimes have been documented in whitebark pine forests in the Shoshone National forest NW of Cody, WY (Morgan and Bunting 1990), and in NE Yellowstone National Park (Barrett 1994). In Western Montana and Idaho, mixed fire regimes have been documented in whitebark pine communities in the Bob Marshall Wilderness (Keane et al. 1994), Selway-Bitterroot Wilderness (Brown et al. 1994), and the West Bighole Range (Murray et al.1998). Mattson and Reinhart (1990) found a stand­replacing fire regime on the Mount Washburn Massif, within Yellowstone National Park.

Pinus albicaulis in Central Montana: Environment, Vegetation and Production

1974 ◽  
Author(s):  
Weaver T. ◽  
◽  
Dale D.
Keyword(s):  
Rocky Mountains ◽  
Growing Season ◽  
Pinus Albicaulis ◽  
Whitebark Pine ◽  
Igneous Origin ◽  
Average Maximum ◽  
Maximum Temperatures ◽  
Central Montana ◽  
Mature Stands

Nineteen apparently climax, non-krumholz, whitebark pine (Pinus albicaulis) forests were sampled at 2490-2930 m in the Rocky Mountains of S-Central Montana. The understory of these forests is strongly dominated by Vaccinium scoparium (median cover 40% +). Mature stands (200 + years old), with trees 12 m high, had basal areas of 14-24 m2/ha and had merchantable volumes of 195 m3/ha. Whitebark stands usually occur on soils of igneous origin. The growing season in a typical stand has 3 wet months with over 80 mm of rain and 3 dry months with less than 50 mm of rain; average maximum temperatures in this period rose to 20 C while average minimum temperatures Jell below 0 C.

Use of Whitebark Pine (Pinus albicaulis) seeds by GPS-collared Grizzly Bears (Ursus arctos) in Banff National Park, Alberta

2021 ◽  
Vol 135 (1) ◽  
pp. 61-67
Author(s):  
David Hamer
Keyword(s):  
National Park ◽  
Ursus Arctos ◽  
High Elevation ◽  
Habitat Characteristics ◽  
Grizzly Bears ◽  
Pinus Albicaulis ◽  
Whitebark Pine ◽  
Gps Collars ◽  
Additional Information ◽  
Banff National Park

Seeds of Whitebark Pine (Pinus albicaulis) are a major food for Grizzly Bears (Ursus arctos) in the Yellowstone ecosystem. In Canada, Grizzly Bears are known to eat Whitebark Pine seeds, but little additional information, such as the extent of such use and habitat characteristics of feeding sites, is available. Because Grizzly Bears almost always obtain Whitebark Pine seeds by excavating cones from persistent caching sites (middens) made by Red Squirrels (Tamiasciurus hudsonicus), it is possible to infer Whitebark Pine feeding when bears are located near excavated middens in Whitebark Pine stands. During 2013–2018, I conducted a retrospective study in Banff National Park using data from 23 Grizzly Bears equipped by Parks Canada staff with global positioning system (GPS) collars. My objectives were to use GPS fixes to determine the percentage of these bears that had been located in close proximity to excavated middens containing Whitebark Pine seeds and to describe the habitat at these excavated middens. I linked 15 bears (65%) to excavated middens and, by inference, consumption of Whitebark Pine seeds. Excavated middens occurred on high-elevation (mean 2103 ± 101 [SD] m), steep (mean 26° ± 8°) slopes facing mostly (96%) north through west (0–270°). Use of Whitebark Pine seeds by at least 65% of the 23 studied Grizzly Bears suggests that conservation of Whitebark Pine in Banff National Park would concomitantly benefit the at-risk population of Grizzly Bears.

Sign in / Sign up

Export Citation Format

Share Document