Table 2.

Semiquantitative analysis of oskar mRNA and Oskar protein distribution in fixed oocytes raised at 25°C

Genotype Oocytes oskar mRNA Oskar protein 
  Off center Width of PD Localized fraction of mRNA Width of PD 
 n µm µm % µm 
Stage 9 
Wild type 70 26.41 ± 1.80 (1.0) 8.89 ± 0.36 (1.0) 51.2 ± 2.2 (1.0) 12.21 ± 0.58 (1.0) 
klarYG3/klarYG3 33 31.73 ± 2.97 (0.13) 10.51 ± 0.76 (0.037) 62.3 ± 3.3 (0.007) 13.54 ± 0.83 (0.359) 
Khc17/+; klarYG3/klarYG3 50 27.78 ± 2.14 (0.718)a 9.98 ± 0.45 (0.05)a 53.8 ± 2.8 (0.536)a 10.34 ± 0.72 (0.012)a 
pat1r/pat1r; klarYG3/klarYG3 23 30.20 ± 2.33 (0.235) 9.26 ± 0.53 (0.401)b 64.3 ± 2.9 (0.002)b 9.36 ± 0.76 (0.004)a,b 
pat1r/pat1r 19 22.00 ± 4.513 (0.195) 18.93 ± 1.77 (<0.001) 47.1 ± 4.6 (0.614) 18.40 ± 2.86c (0.015) 
osk54/+ 33 32.83 ± 2.76 (0.06) 11.95 ± 0.64 (<0.001) 62.2 ± 2.9 (0.005) 12.53 ± 0.98 (0.343) 
oskA87/+ 39 25.60 ± 1.79 (0.937) 9.50 ± 0.43 (0.061) 56.2 ± 2.5 (0.047) 9.669 ± 0.607 (0.002) 
klarYG3, oskA87/klarYG3, + 88 37.77 ± 1.31a (<0.001) 9.70 ± 0.26 (0.032) 74.7 ± 0.8 (<0.001)a 11.125 ± 0.441 (0.040)a 
klarYG3/klar1 32 31.30 ± 1.90 (0.870)d 8.44 ± 0.55 (0.013)d 77.5 ± 1.2 (<0.001)d ND 
Stage 10 
Wild type 62 56.05 ± 4.31 (1.0) 12.05 ± 0.45 (1.0) 51.7 ± 2.9 (1.0) 17.87 ± 0.61 (1.0) 
klarYG3/klarYG3 42 68.57 ± 5.49 (0.026) 15.54 ± 0.61 (<0.001) 67.5 ± 3.1 (<0.001) 21.03 ± 0.80 (<0.001) 
Khc17/+; klarYG3/klarYG3 59 64.24 ± 3.08 (0.440)a 14.59 ± 0.40 (<0.001) 57.6 ± 2.7 (0.116)a 17.85 ± 0.56 (0.809)a 
pat1r/pat1r; klarYG3/klarYG3 25 61.37 ± 2.91 (0.551)a 13.03 ± 0.57 (0.214)a,b 49.1 ± 3.9 (0.649)a 17.45 ± 0.83 (0.855)a,b 
pat1r/pat1r 41 62.03 ± 4.915 (0.461) 16.64 ± 0.81 (<0.001) 46.9 ± 3.1 (0.306) 22.62 ± 0.96 (<0.001) 
osk54/+ 35 73.38 ± 1.98 (0.033) 16.95 ± 0.66 (<0.001) 67.0 ± 2.5 (0.001) 18.25 ± 0.76 (0.496) 
oskA87/+ 41 56.33 ± 3.38 (0.164) 12.30 ± 0.51 (0.654) 39.1 ± 2.3 (0.007) 16.26 ± 0.63 (0.166) 
klarYG3, oskA87/klarYG3, + 63 76.74 ± 2.89 (<0.001) 11.64 ± 0.35a (0.647) 58.8 ± 2.3 (0.077)a 15.86 ± 0.67 (0.112)a 
klarYG3/klar1 28 76.44 ± 4.16 (0.390)d 13.85 ± 0.64 (0.094)d 67.3 ± 3.1 (0.686)d ND 
Genotype Oocytes oskar mRNA Oskar protein 
  Off center Width of PD Localized fraction of mRNA Width of PD 
 n µm µm % µm 
Stage 9 
Wild type 70 26.41 ± 1.80 (1.0) 8.89 ± 0.36 (1.0) 51.2 ± 2.2 (1.0) 12.21 ± 0.58 (1.0) 
klarYG3/klarYG3 33 31.73 ± 2.97 (0.13) 10.51 ± 0.76 (0.037) 62.3 ± 3.3 (0.007) 13.54 ± 0.83 (0.359) 
Khc17/+; klarYG3/klarYG3 50 27.78 ± 2.14 (0.718)a 9.98 ± 0.45 (0.05)a 53.8 ± 2.8 (0.536)a 10.34 ± 0.72 (0.012)a 
pat1r/pat1r; klarYG3/klarYG3 23 30.20 ± 2.33 (0.235) 9.26 ± 0.53 (0.401)b 64.3 ± 2.9 (0.002)b 9.36 ± 0.76 (0.004)a,b 
pat1r/pat1r 19 22.00 ± 4.513 (0.195) 18.93 ± 1.77 (<0.001) 47.1 ± 4.6 (0.614) 18.40 ± 2.86c (0.015) 
osk54/+ 33 32.83 ± 2.76 (0.06) 11.95 ± 0.64 (<0.001) 62.2 ± 2.9 (0.005) 12.53 ± 0.98 (0.343) 
oskA87/+ 39 25.60 ± 1.79 (0.937) 9.50 ± 0.43 (0.061) 56.2 ± 2.5 (0.047) 9.669 ± 0.607 (0.002) 
klarYG3, oskA87/klarYG3, + 88 37.77 ± 1.31a (<0.001) 9.70 ± 0.26 (0.032) 74.7 ± 0.8 (<0.001)a 11.125 ± 0.441 (0.040)a 
klarYG3/klar1 32 31.30 ± 1.90 (0.870)d 8.44 ± 0.55 (0.013)d 77.5 ± 1.2 (<0.001)d ND 
Stage 10 
Wild type 62 56.05 ± 4.31 (1.0) 12.05 ± 0.45 (1.0) 51.7 ± 2.9 (1.0) 17.87 ± 0.61 (1.0) 
klarYG3/klarYG3 42 68.57 ± 5.49 (0.026) 15.54 ± 0.61 (<0.001) 67.5 ± 3.1 (<0.001) 21.03 ± 0.80 (<0.001) 
Khc17/+; klarYG3/klarYG3 59 64.24 ± 3.08 (0.440)a 14.59 ± 0.40 (<0.001) 57.6 ± 2.7 (0.116)a 17.85 ± 0.56 (0.809)a 
pat1r/pat1r; klarYG3/klarYG3 25 61.37 ± 2.91 (0.551)a 13.03 ± 0.57 (0.214)a,b 49.1 ± 3.9 (0.649)a 17.45 ± 0.83 (0.855)a,b 
pat1r/pat1r 41 62.03 ± 4.915 (0.461) 16.64 ± 0.81 (<0.001) 46.9 ± 3.1 (0.306) 22.62 ± 0.96 (<0.001) 
osk54/+ 35 73.38 ± 1.98 (0.033) 16.95 ± 0.66 (<0.001) 67.0 ± 2.5 (0.001) 18.25 ± 0.76 (0.496) 
oskA87/+ 41 56.33 ± 3.38 (0.164) 12.30 ± 0.51 (0.654) 39.1 ± 2.3 (0.007) 16.26 ± 0.63 (0.166) 
klarYG3, oskA87/klarYG3, + 63 76.74 ± 2.89 (<0.001) 11.64 ± 0.35a (0.647) 58.8 ± 2.3 (0.077)a 15.86 ± 0.67 (0.112)a 
klarYG3/klar1 28 76.44 ± 4.16 (0.390)d 13.85 ± 0.64 (0.094)d 67.3 ± 3.1 (0.686)d ND 

Means ± SEM; the numbers in parentheses indicate the p-value of a pairwise Mann–Whitney U test against the wild-type control of a given developmental stage performed after a Kruskal–Wallis test rejecting similarity of the data distributions (α = 0.05). Off center represents the difference between the observed and the calculated center of mass along the AP axis. Width of PD is the onset of oskar mRNA or Oskar protein enrichment, when the observed signal uninterruptedly exceeds the double of the calculated or expected signal. Distance is measured from the posterior pole. Localized fraction of mRNA is the fraction of the oskar mRNA signal found in the posterior domain.

a

Pairwise Mann–Whitney U test against the klarYG3/klarYG3 control with P < 0.05.

b

Pairwise Mann–Whitney U test against the pat1r/pat1r control with P < 0.05.

c

Only 9 out of 19 oocytes had detectable Oskar protein.

d

Pairwise comparison of klarYG3/klar1 with klarYG3/klarYG3 mutant oocytes using the appropriate tests.

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