Blood characters, such as, erythrocyte number, leukocyte number, hemoglobin content, serum protein percentage, leukocyte diagnosis and liver dehydrogenase activity were determined among the W
1 and W
2 subline and their reciprocal hybrids, W
1 (_??_) ×W
2 ( _??_) and W
2 (_??_) ×W
1 ( _??_) .
There were significant genetic differences among the two lines and hybrids in factors affecting erythrocyte number, leukocyte number and hemoglobin content. Erythrocyte number was 867 in W
1, 777 in W
2, 878 in W
1×W
2 and 786 in W
2×W
1 (ten thousand) . Leukocyte number was 5, 871 in W
1, 7, 750 in W
2, 6, 356 in W
1×W
2 and 7, 242 in W
2×W
1. Hemoglobin content was 16.49 in W
1, 16.06 in W
2, 16.40 in W
1×W
2 and 15.10 in W
2×W
1 (g/dl) . The values of erythrocyte number, leukocyte number and hemoglobin content in F
1 from mother showing high values were higher as compared with those in F
1 from mother showing low values. The results might indicate that there are certain maternal effects for the blood characters of hybrids mice.
Intensity of heterosis was concluded by the calculation of potence ratio in F
1 with the following results. Erythrocyte number, showed higher value in W
1×W
2 than in W
1, W
2, showing intense heterosis, and hemoglobin content lower value in W
2×W
1 than in W
1, W
2. Other characters in F
1 showed intermediate value of W
1 and W
2.
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