河北种质库部分作物种子生活力监测分析

对河北省种质库中21种作物1.3万多份种子进行了生活力监测,结果表明,①贮存12~17年后,94.55%以上的被监测种子发芽率仍保持在80%以上,但有292份种子(占被监测份数的2.00%)发芽率出现了明显下降(从80%以上降至70%以下)。②不同作物种子发芽率的变化趋势不完全相同,燕麦和冬小麦亲本两种作物种子平均监测发芽率出现了显著下降。同一作物不同品种、荞麦、冬小麦和玉米不同类型、燕麦入库不同批次、夏大豆不同收获年代等贮藏后发芽率的变化也存在明显差异。与黄粒玉米相比,白粒玉米监测发芽率显著低于入库发芽率,但尚需扩大监测品种数量以验证其普遍性。

Monitoring Analysis of Seed Viability of Some Crops in Hebei Genebank

Seed viability of 13 137 accessions in 21 crops was monitored after storage for 12-17 years in Hebei Genebank,China.More than 94.5% accessions still maintained high germination percentage(GP)(over 80%).The GP of 292 accessions,accounting for 2% in total monitoring accessions,declined significantly from over 80% to under 70%.The change tendencies of seed viability of different crops were not completely same after storage.Mean GP declined significantly in oats and winter wheat parents after storage.Many factors including different varieties in the same crop, different types in buckwheat and winter wheat and corn,different storing sets in oat,different harvesting years in summer soybean,resulted in obvious difference of GP after storage.Mean GP of white corn declined significantly compared with yellow corn after storage,but further experiments with more accessions need to be done in order to test its universality.