摘要
研究证明:Zeleny沉降值具有较好的环境稳定性,即环境条件对不同基因型的作用相对一致,并且这种相对稳定性水平至少要高于千粒重。相比之下,SDS沉降值则更多地受到基因型和环境间互作的影响,表现为环境稳定性相对较差,实践中应根据研究的特点选择不同的测试方法。另外新推出的膨胀系数(SIG)法表现出了和Zeleny法几乎同样的环境稳定性,并可以很好地区分品种、种植地点和密度差异对小麦品质的影响,有必要对其进行进一步的研究。麦田基本苗密度从稀条播降至点播水平后几乎所有品质性状都得以改善。这说明密度是优质环境中重要的因素之一。另外淋雨导致的穗发芽对Zeleny沉降值的测定结果影响不明显,但使SDS沉降值和膨胀系数的测定结果升高7.1%和2.9%,分别达到极显著和显著水平,不过萌芽程度与SDS沉降值升高的程度并无明显的相关。同时在几个不同的品质指标中,不同品种雨前和雨后测试结果的相关均达极显著水平(r值在0.9左右),说明品种间仍具可比性。在育种研究中不必因为淋雨和穗发芽而放弃原定的沉降值筛选计划,当然此时采用Zeleny法测定更为稳妥,不仅材料间可以相互比较,测定结果在量值上也不必做校正。
Sedimentation values varied significantly with growing site of wheat varieties, however, as the growing site changed, the relationship in between different genotypes was relatively stable when measured by Zeleny-Sedimentation test or by swelling index of glutenin test (SIG); but the result from SDS-Sedimentation test was easily affected by the interactions between genotypes and environments.Compared to the row planting, the adopting of dibble seeding strategy was helpful to improve wheat quality, this indicate the quality standards set for breeding nursery should be higher then that for commercial production.Sprout caused by continuous rain had no significant effect on Zeleny- Sedimentation value, but made SDS-Sedimentation value and SIG value get higher significantly, but sprout did not change the relations among different genotypes.
出处
《华北农学报》
CSCD
北大核心
2005年第2期53-58,共6页
Acta Agriculturae Boreali-Sinica
关键词
小麦
品质指标
沉降值
膨胀系数
环境稳定性
Wheat
Quality
Sedimentation value
Swelling index of glutenin
Influence of environment
