水稻耐盐种质的鉴定评价

进一步鉴定现有水稻材料的耐盐性，为水稻耐盐育种提供种质资源和耐盐亲本。以通过花粉管通道技术获得的耐盐品系和当地水稻育成品种共21份为试验材料，评价各材料在盐胁迫下发芽期和苗期的耐盐性。结果表明：在150 mmol/L NaCl处理下，各材料发芽率及芽的生长均受到不同程度抑制，其中，材料D-1，D-3，D-4，D-7，D-13，‘长白10号’，‘节9’和D10在盐处理下的发芽率较高，相对盐害率较低，耐盐性均表现为极强，耐盐级别为1级，芽长盐处理(T)与非盐处理(CK)的比值较高，说明其受到盐的抑制较小，芽期耐盐能力较强；用100 mmol/L NaCl对各材料幼苗处理8天后，材料‘长白10号’、D-10、‘节10’、D-13、‘天井4号’、D-14、D-11、D-2、D10和D-8的相对死叶率较低，盐处理地上部和地下部含水量与未用盐处理的相比下降幅度较小，可溶性糖积累量较多，说明其渗透调节能力较强，属于苗期较耐盐的材料。

Evaluation of Salt Tolerance in Rice Germplasm

The research aimed to further evaluate salt tolerance of different rice materials,so as to provide germplasm resources and parents for salt-tolerant rice breeding. 14 rice lines with strong salt tolerance and 7rice varieties were used to evaluate salt tolerance in germination and seedling stage. The results showed that,when treated with 150 mmol/L NaCl,the germination rate and bud length of all materials were restrained to different extent. The germination rate of D-1,D-3,D-4,D-7,D-13,‘Changbai 10＇,‘Jie 9＇and‘D10＇were high,and its relative salt harm rate were low,the salt tolerance were showed to be very strong and the grade reached to 1,the ratio of salt treatment（T） and non-salt treatment（CK） of bud length were high,this indicated these materials suffered little from salt and with strong salt tolerance. When seedlings treated with 100 mmol/L NaCl,the rate of average dead leaf of materials‘Changbai 10＇,D-10,‘Jie 10＇,D-13,‘Tianjin 4＇,D-14,D-11,D-2,‘D10＇and D-8 were low,the water content of ground and underground decreased little and the soluble sugar content increased more than other materials. Therefore,these materials have strong osmoregulation ability and have strong salt tolerance in seedling stage.