After two generations of intermating, four populations were developed: BS35 (BSSS-subtropical), S36 (nonBSSS-subtropical), BS37 (BSSS-tropical), and BS38 (nonBSSS-tropical).

• 经过两代相互交配，形成四个群体：BS35 (BSSS-亚热带)，S36 （非BSSS-亚热带）BS37（BSSS-热带）和BS38（非BSSS-热带）。