TABLE 15.1–Genetic variability at 9 isozyme loci in 36 populations of 26 taxa of Arceuthobium
 
Population
number*
Collection
number*
Arceuthobium Mean
sample size
per locus
Mean no.
of alleles
per locus
Percent
polymorphic
loci†
Expected
Hardy-Weinberg
heterozygosity‡

1 1917 A. abietinum f. sp. concoloris 42.2 2.0 55.6 0.206
2 1906 A. abietinum f. sp. magnificae 54.7 2.3 44.4 0.183
3 1983 A. abietis-religiosae 34.3 2.0 55.6 0.250
4 2010 A. abietis-religiosae 61.6 1.4 33.3 0.109
5 1932 A. americanum 47.7 3.0 55.6 0.200
6 1929 A. americanum 35.8 3.8 77.8 0.351
7 1945 A. apachecum 61.7 2.0 44.4 0.210
8 1937 A. blumeri 35.1 2.0 22.2 0.133
9 1930 A. californicum 49.6 2.6 66.7 0.253
10 1924 A. campylopodum 28.8 2.1 55.6 0.211
11 1973 A. cyanocarpum 17.6 1.7 44.4 0.124
12 1953 A. divaricatum 80.3 2.7 55.6 0.209
13 1941 A. douglasii 27.7 2.1 44.4 0.228
14 1949 A. douglasii 44.6 2.4 33.3 0.192
15 1870 A. durangense 26.7 2.9 66.7 0.265
16 2049 A. durangense 9.3 2.3 66.7 0.299
17 2051 A. durangense 26.8 3.3 77.8 0.365
18 1938 A. gillii 77.8 2.8 44.4 0.198
19 1996 A. globosum subsp. grandicaule 27.2 1.6 11.1 0.092
20 1801 A. laricis 21.4 1.7 55.6 0.170
21 1947 A. microcarpum 19.1 1.7 33.3 0.154
22 2041 A. nigrum 31.7 2.4 66.7 0.269
23 1962 A. occidentale 37.8 2.0 55.6 0.184
24 1992 A. pendens 20.8 1.8 33.3 0.106
25 1970 A. pusillum 50.9 2.0 22.2 0.103
26 1971 A. pusillum 30.8 1.7 44.4 0.166
27 1853 A. rubrum 8.3 1.3 33.3 0.139
28 2061 A. strictum 24.2 1.1 11.1 0.039
29 1927 A. tsugense subsp. mertensianae 10.0 1.9 66.7 0.290
30 1876 A. vaginatum subsp. cryptopodum 53.0 2.7 44.4 0.172
31 1964 A. vaginatum subsp. cryptopodum 30.2 2.8 55.6 0.256
32 2059 A. vaginatum subsp. vaginatum 8.9 2.0 66.7 0.230
33 1980 A. vaginatum subsp. vaginatum 29.8 2.4 66.7 0.274
34 1981 A. vaginatum subsp. vaginatum 15.4 1.9 66.7 0.233
35 2001 A. verticilliflorum 12.8 1.7 44.4 0.175
36 2065 A. verticilliflorum 4.6 1.3 33.3 0.169
____ ____ ____ _____
Means 33.3 2.15 48.7 0.200

*See "Specimens Examined" for information on host and locality.
A locus is considered polymorphic if the frequency of the most common allele does not exceed 0.95.
Unbiased estimate (Nei 1978). Direct count heterozygosity not possible given that the allelic data were derived from triploid genotypes.

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