“异源”的英语？

所有的梨亚科是由两个远缘祖先类型双杂交演化的异源多倍体.All the Pomoideae were allopolyploids drived from a doubled hybrid between two remote ancestral types.东天山尾亚杂岩体: 同源还是异源? -- 来自黑云母的证据.Weiya complex, eastern Tianshan: Single - sourced or diverse...

“异源”的拼音为：yì yuán...