德牧顏色遺傳規律

影響德牧色型的a系復等位基因。考量四種影響着德牧的毛色的隱性基因：它們是純黑a、鐵包金at、黑背as和狼青ay。

純合黑aa與其他色型的後代

a + a = 純黑

a + at =鐵包金

a + as = 黑背

a + ay = 狼青

純合鐵包金atat與其他色型的後代

at + a =鐵包金

at + at =鐵包金

at + as = 黑背

at + ay = 狼青

純合黑背asas與其他色型的後代

as + a = 黑背

as + at = 黑背

as + as = 黑背

as + ay = 狼青

純合狼青ayay與其他色型的後代

ay + a = 狼青

ay + at = 狼青

ay + as = 狼青

ay + ay = 狼青

統計可知：在16個理論後代中，狼青佔7，黑背佔5，鐵包金佔3，純黑佔1.。這就是在不分色型的繁育中，德牧後代的大致比例。