水稻全生育期耐盐资源的初步筛选

Primary Screening of Salt-tolerant Rice Germplasm in Entire Growth Period

为了筛选全生育期耐盐的水稻资源,本研究对500份不同来源的国内外地方品种和旱稻资源用0.3%的NaCl盐溶液进行了苗期筛选。对筛选到的34份苗期存活率和绿叶率大于50%的材料和前人报道的121份耐盐材料用0.3%和0.5%的NaCl进行了全生育期耐盐性筛选。结果发现,不同材料间耐盐性差异很大,同一材料不同个体间耐盐一致性亦存在差异。0.3%的NaCl共筛选到7个品种的11个全生育期耐盐存活单株,而0.5%的NaCl仅筛选到1个品种中的1个存活单株。在存活单株中,有4个单株产量超过18 g,最高的达21.8 g。以上表明,通过大规模筛选是可以筛选到全生育期耐盐水稻资源。这些材料为耐盐机理研究和耐盐育种研究提供了材料基础。

In order to obtain salt-tolerant rice germplasm during entire growth period, 500 local rice varieties and upland rice at home and abroad from different rice growing region were treated with 0.3% NaC1 at seedling stage. Thirty-four rice varieties with their survival rate and green leaf rate exceeding 50% were screened out. The 34 rice varieties and 121 salt-tolerant rice varieties reported previously were then treated with 0.3% NaC1 and 0.5% NaC1 during entire growth period. The results showed that salt tolerance between different varieties varied greatly, and that salt tolerance between different individuals of the same variety was also different. Eleven plants from 7 varieties tolerant to 0.3% NaC1 were obtained. Plants from one variety tolerant to 0.5% NaC1 were obtained. The yield of 4 individuals, in all plants survived, exceeded 18 g per plant with the maximum up to 21.8 g. These showed that salt-tolerant rice varieties during entire growth obtained through large-scale salt screening. These salt-tolerant varieties provided materials mechanism of salinity tolerance and cuhivar innovation. period could be for the study on