can any one give me the possible reason for the following occasions.

i have got the result of combining ability analysis but i am thinking of the possible reason of being +ve and -ve of the different GCA effects of Males and Females giving +ve and -ve SCA effects.

can any one point out me for this issue?

1. GCAfm =-ve (Negative) GCAm=-ve (Negative) SCA = +ve (Positive)

2. GCAfm =-ve (Negative) GCAm= -ve (Negative) SCA= -ve (Negative)

3. GCAfm =-ve (Negative) GCAm= +ve (Positive) SCA= +ve (Positive)

4. GCAfm =-ve (Negative) GCAm= +ve (Positive) SCA= -ve (Negative)

5. GCAfm =+ve (Positive) GCAm= +ve (Positive) SCA= -ve (Negative)

6. GCAfm =+ve (Positive) GCAm= +ve (Positive) SCA= +ve (Positive)

7. GCAfm =+ve (Positive) GCAm= -ve (Negative) SCA= -ve (Negative)

8. GCAfm =+ve (Positive) GCAm= -ve (Negative) SCA= +ve (Positive)

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