不同裂荚特性箭筈豌豆裂荚力数字化评价

The digital evaluation of the cracking force of common vetch with the different characteristics of pod shattering

以美国种质资源库(NPGS)提供的541份箭筈豌豆(Vicia sativa)种质为基础,经过连续3年裂荚率评价,共筛选出高、中、低裂荚种质33份。以这33份箭筈豌豆种质作为本研究的试验材料,利用艾德堡HP-50数显推拉力计结合裂荚率对箭筈豌豆荚果水平放置时的裂荚机械力和垂直放置时的裂荚机械力进行分析,为选育箭筈豌豆抗裂荚种质提供精确、快速的评价方法。结果显示,1)箭筈豌豆高裂荚种质荚果裂荚机械力极显著低于低裂荚种质荚果裂荚机械力(P<0.01)。2)箭筈豌豆荚果水平放置时的裂荚机械力极显著低于垂直放置时的裂荚机械力(P<0.01)。3)箭筈豌豆荚果在水平放置下裂荚机械力大于9.286N的为低裂荚种质,裂荚机械力小于2.163N的为高裂荚种质。研究表明,利用推拉力计测试水平放置的箭筈豌豆荚果裂荚机械力可准确反映箭筈豌豆不同种质的裂荚特性,并为箭筈豌豆裂荚特性的标准化测定提供了重要的参考依据。

After three years of screening 541 common vetch（Vicia sativa）accessions from National Plant Germplasm System（NPGS）,33 accessions with high,moderate and low pod shattering rate were selected for the further study.In the present study,the pod shattering rate,the pod horizontal cracking mechanical force and vertical cracking mechanical force of these 33 common vetch accessions were analyzed and measured by a digital mechanical force gauge（HANDPI,HP-50）to provide accurate and rapid evaluation method for screening non-shattering accessions.The results showed that the cracking mechanical force of accessions with high pod shattering rate was significantly lower（P〈0.01）than that of accessions with low pod shattering rate.The horizontal cracking mechanical force of common vetch pods was significantly lower（P〈0.01）than the vertical cracking mechanical force of them.The accessions with horizontal cracking mechanical force greater than the9.286 N were low shattering accessions,meanwhile the accessions with horizontal cracking mechanical force less than 2.163 Nwere high shattering accessions.These results indicated that pod horizontal cracking mechanical force measured by digital mechanical force gauge could accurately reflect the pod crack characteristic of different accessions and provided reference for the pod shattering characteristics.