disomic

1.(2) it was difficult to obtain alien disomic addition lines from alien monosomic and double monosomic additions;

(2)在建立-草异源二附加系研究中，异源和附加系并非良好基础材料；

2.(2)在建立-草异源二附加系研究中，异源和附加系并非良好基础材料；

(2) it was difficult to obtain alien disomic addition lines from alien monosomic and double monosomic additions;

3.The chromosome conferring resistance to BYDV showed the intendance to substitute 2D rather than 2A, 2B wheat chromosomes in disomic substutution lines.

在二代换系中,该染色优先取代2D染色、而非2A、2B染色;