1.正交和反交。如果把甲×乙称做正交的话,则乙×甲就称做反交。正交和反交的结果有时是有差别的。这个差别与母本的细胞质的参与育性遗传有关。因此,通过正反交可以判断父母本的细胞质之间是否有差异。如红芒野生稻×莲塘早,F_1的自交结实率为1.7％,而蓬塘早×红芒野生稻的F_1 1. Orthogonal and anti-cross If A × B is said to be orthogonal, then B × A is called inverse. The results of orthogonality and deconvolution are sometimes different. This difference is related to the cytoplasmic fertility inheritance of the female parent. Therefore, through the reciprocal reciprocation can be judged whether there is a difference between the parental cytoplasm. For example, the percentage of selfing of F_1 in Hongmang wild rice × Liantang early was 1.7%, while that in Pengtangzao × Hongmang wild rice was F_1