栝楼种子质量分级标准研究

Study on Seed Quality Grading Standard of Trichosanthes kirilowii Maxim.

目的 研究栝楼种子质量分级标准。方法 依据农作物种子检验规程和栝楼种子质量检验方法,以12份不同产地栝楼为试验材料,测定栝楼种子的7个质量性状指标并进行相关性分析、主成分分析和聚类分析。结果 栝楼种子质量等级可划分为3个等级,Ⅰ级种子:种子千粒重≥250.0 g,种子生活力≥90.0%,种子发芽率≥80.0%;Ⅱ级种子:种子千粒重160.0~250.0 g,种子生活力60.0%~90.0%,种子发芽率50.0%~80.0%;Ⅲ级种子:种子千粒重≤160.0 g,种子生活力≤60.0%,种子发芽率≤50.0%。结论 种子千粒重、生活力和发芽率显著影响栝楼种子质量,可作为栝楼种子质量分级的主要指标。

Objective To study the quality grading standard of Trichosanthes kirilowii seed.Methods According to the rules for agricultural seed testing and the study on seed testing methlod of Trichosanthes kirilowii,12 samples from different areas were used as experimental materials,7 quality indexes of T.kirilowii seed were measured and correlation analysis,principal component analysis and cluster analysis were conducted.Results The T.kirilowii seeds could be divided into 3 grades.Grade Ⅰ:1 000-grain seed weight ≥250.0 g,seed viability ≥ 90.0%,seed germination rate ≥80.0%;Grade Ⅱ:1 000-grain seed weight 160.0 ~ 250.0 g,seed viability 60.0% ~ 90.0%,seed germination rate 50.0% ~ 80.0%;Grade Ⅲ:1 000-grain seed weight ≤ 160.0 g,seed viability ≤ 60.0%,seed germination rate ≤ 50.0%.Conclusion The 1 000-grain seed weight,seed viability and seed germination rate significantly affect the quality of T.kirilowii seeds and can be used as the main indexes for seed quality grading.