不同燕麦品种萌发期的抗旱性比较研究

A Comparative Study on Drought Resistance in the Germination of Different Oat Varieties

燕麦(Avena L.)是禾本科燕麦属的一年生的草本植物,属于粮饲兼用作物,具适应性广、抗逆性强等特点。为比较不同燕麦品种种子萌发期的抗旱性,以7个饲用燕麦品种为供试材料,采用15%的聚乙二醇(PEG-6000)模拟干旱胁迫,测定相对发芽率、相对发芽势等8个生长指标,并对其进行了主成分分析和加权隶属函数法综合比较。结果表明,与燕麦种子萌发期抗旱性关系最密切的评价指标有种子萌发指数、发芽指数、活力指数、鲜重、胚芽长、胚根长和发芽势;在15%PEG-6000干旱胁迫下,燕麦品种贝勒抗旱性综合评价值最高,D值为0.710;品种Haywire的抗旱性最差,D值为0.103;饲用燕麦萌发期抗旱性强弱依次为:贝勒>坝莜6号>定燕2号>蒙饲草2号>蒙燕1号>冀张燕4号>Haywire。

Oats(Avena L.)are an annual herb of oat genus,which also belongs to the grain-fed crops,with wide adaptability and strong resistance and so on.In order to compare the drought resistance of seeds of different oat varieties,7 oat varieties were used as test materials,15%polyethylene glycol(PEG-6000)simulated drought stress,and 8 growth indicators such as relative germination rate and relative germination potential were measured,and a comprehensive comparison of the principal component analysis and weighted membership function method was carried out.The results showed that the most closely evaluated evaluation indicators with the drought-resistant relationship of oat seeds in the germination period were promptness index,germination index,vitality index,fresh weight,germ length,radicle length and germination energy;under the stress of 15%PEG-6000 drought,the comprehensive evaluation value of oat varieties baylor was the highest,with a D value of 0.710;The species Haywire is the least drought-resistant,with a D value of 0.103.The drought resistance during the germination period of covered oats is in turn:Belle>Bayou No.6>Dingyan No.2>Mengsicao No.2>Mengyan No.1>Jizhangyan No.4>Haywire.