Cytological 10L-breakpoints of B-10L translocations --Cheng, Y-M, Lin, B-Y We reported previously (MNL 75:61, 2001) cytological breakpoints on 10L of ten B-10L translocations. Here, we report the 10L breakpoint of an additional 17 (Table 1). Results of these two studies were combined in Figure 1. Comparison of this map with the previous linkage data (Lin, MNL 48:182-184, 1974) reveals several discrepancies, most of which may be attributable to errors of small sample size associated with the linkage analyses.

Table 1. Cytological breakpoint on 10L of 17 B-10L translocations.
 
Translocations Breakpoint on 10L Average Standard Error Lin�s dataa
TB-10L3 0.33, 0.27, 0.35, 0.32, 0.29 0.31 0.03 0.61
TB-10L7 0.50, 0.46, 0.52, 0.54, 0.47 0.50 0.03 0.77
TB-10L8 0.36, 0.35, 0.25, 0.35, 0.46, 0.42 0.37 0.07 0.50
TB-10L5 0.44, 0.51, 0.41, 0.48, 0.41, 0.46  0.45 0.04 0.61
TB-10L10 0.37, 0.50, 0.39, 0.48, 0.33 0.41  0.07 0.65
TB-10L13 0.58, 0.61 0.60 0.02 ndb
TB-10L14 0.59, 0.71, 0.69, 0.73, 0.58, 0.67, 0.71 0.67 0.02 0.45
TB-10L18 Centromere Centromere - 1.35
TB-10L25 0.44, 0.56, 0.45, 0.46, 0.40, 0.49 0.47 0.05 0.67
TB-10L28 0.53, 0.46, 0.41, 0.36, 0.49, 0.46 0.45 0.06 0.82
TB-10L29 0.43, 0.37, 0.46, 0.40, 0.35, 0.37 0.40 0.04 0.39
TB-10L31 0.65, 0.67, 0.65, 0.71, 0.65, 0.64 0.66 0.03 0.86
TB-10L32 0.69, 0.59, 0.67, 0.73 0.67 0.06 0
TB-10L34 0.59, 0.49, 0.53, 0.46, 0.61, 0.54 0.54 0.06 0.47
TB-10L35 0.58, 0.46, 0.60, 0.56, 0.48 0.53 0.06 0.41
TB-10L37 0.61, 0.64, 0.58, 0.57 0.60 0.03 0.63
TB-10L38 0.60, 0.58, 0.56, 0.63, 0.67 0.61 0.04 0.54

aRecombination ratio of breakpoint-R/g-R (from Lin, 1974).
bNo data.

Figure 1. Cytological 10L breakpoints of 26 B-10L translocations.
 
 

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