小麦品种抗旱性形态指标比较研究

目的]为小麦抗旱育种及其抗旱性鉴定提供依据。方法]以2002～2003及2003～2004年度黄淮冬麦区旱地组抗旱性鉴定的22个参试品种为供试材料,分别对其进行棚内干旱试验和棚外露天试验,并对各品种最高群体、株高、有效穗、穗粒数、千粒重、穗长、小穗数、不育小穗和小穗密集度的水分胁迫敏感因子（Csi）与籽粒抗旱指数进行相关及回归分析。结果]所分析9个数量性状的Csi均大于0,其中株高和千粒重的平均Csi较高（分别为22.6和20.3）,穗长和不育小穗的平均Csi较低（分别为0.6和1.0）;有效穗、千粒重、小穗数、小穗密集度的CSi与籽粒抗旱指数均达显著相关水平,这4个指标可作为判定小麦品种抗旱性的形态指标。结论]该研究确定了冬小麦品种的形态抗旱指标。

Comparative Study on Morphological Indexes of Drought Resistance of Wheat Varieties

Objective] The study was to provide the basis for drought-resistant breeding of wheat and the drought resistance identification of wheat arieties. Method] With 22 wheat varieties tested in drought resistance identification of dryland group in Huang-huai valley winter wheat areas in 2002-2003 and 2003-2004 as the tested materials,the drought test inside the shed and the exposure test outside the shed were conducted. The correlation and regression relationships between water stress sensitive factors(Csi) of...