Research Results - (PDF, 101 mb) - USAID

Figure 5. Fingerprinted with the M13 probe. Individual 908 is the family sire. A + indicates the
presence of a particular marker allele.
Individual
Marker 908 7099 7137 8030 7118 8039 7124 8041 8029 7164 7105 7218
MIO + + + +
+
M14 +
+
M15
+ +
M18 + + +
M29
+
M30 +
M33
+
M36 + + + + +
+ + + +
M37
+
M41
+
M44 + + +
ten markers, all family groups sampled were
represented. These ten markers were grouped
within five haifsib groups, or lines, and are the
basis for comparison in the remainder of this
report. Figure 5 shows multilocus genotypes for
a halfsib group fingerprinted with the M13
probe.
Statistical analysis of growth and indicators
of parasitism were performed on those
goats which had blood samples analyzed (table
6 and figure 6). Instead of breed effects, the
goats were divided into five sire groups or lines
and this designation was used in the model.
Evaluation of body weight from birth to one
year of age demonstrates the differences which
existed between the different lines on test. Line
1was consistently the heaviest group evaluated,
while line 5 was the smallest. A number of
factors besides genetic resistance to internal
parasites could be responsible for those differ-
ences (e.g., breed differences). That is not to say
that if genetic resistance is present, that it is not
helping to facilitate the growth and development
of the kids tested. As more animals are
screened, it will be possible to perform a much
more comprehensive analysis to discriminate
between sources of variation.
A critical variable used in analysis of
animal health was PCV. PCVs were cellected
every 14 days, however their interpretation was
confounded by changes in animal status between
times of measurement. For example, if
worm burden was high enough to require a
drench, PCV for the next measurement period
might increase dramatically. The mean PCVs
did not differ greatly between lines, however,
the minimum and maximum measurements did.
Differences between lines were larger for FEC
than PCV, however, these differences were not
significantly different between markers.
Table 6. Mean packed Cell Volume, Fecal Egg Counts and markers.
Line
TRAIT 1 2 3 4 5
PCV 31.2 30.9 31.2 30.8 31.6
FEC 5831 3610 6723 7929 7368
Markers M9,M21,M60 M10,M36 M59,M61 M3,M52 M49
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