With wing venation alone ( as Chris suggests) the percent of Africanization
is hard to determine.
The usual method is to take a sample of 50 right forewings from a colony and plot the cubital index and discoidal shift on a scatter-graph. If the plotted points form a tight group the bees are racially pure; if scattered, the bees are hybrids. The position of the group (if there is one) tells one to which race the bees belong. At a lecture by Norman Carreck at the Devon Apicultural Research Group last weekend, he told us that a recent dna study had confirmed the accuracy of the wing vein test at least as far as Amm is concerned.
Chris
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