ecological race

The results show that ① the multi - spikelets and multi - grains cultivar ecotype can be selected for the climate conditions in Sichuan which are favourable to the differentiation and development of wheat spikes, ②the cultivar and cultivar type can be selected if the parents.

结果表明：①四川气候生态条件有利于小麦幼穗分化发育，能选育出小穗、粒数多的品种生态型；②同组合的亲本、低代和中高代材料在不同土壤生态条件下，可选育出适应范围广的品种及其品种类群；③在易发病条件下才可能选育出高抗病品种。

The study on the relationship between lean percentage of the pig carcass read by machine and grade of pig strain;

猪胴体瘦肉率仪器测定值与生猪品种等级的关系研究

This paper deals with the application of ion implantation in biology engineering,and it has reported the achievements of ion beam biological technology applied to the improvement of biological breeds and the transfer of outer genes.

报道了离子束生物技术应用于生物品种改良和外源基因转移所取得的成果，及我们近期所研究的与此相关的其他成果。