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以单产７ ５００ ｋｇ·ｈｍ －２ 以上的扬麦１５８ 高产株型为研究对象，分析了小麦高产株型的生理特性，结果表明： 与中、低产株型相比，小麦高产株型的剑叶中异戊烯基腺苷（ｉＰＡ） 、玉米素（ＺＲ） 、生长素（ＩＡＡ） 、赤霉素（ＧＡ３） 含量显著高，ＡＢＡ 含量显著低，剑叶光合强度与ｉＰＡ，ＺＲ，ＩＡＡ 和ＧＡ３ 含量呈显著正相关，与ＡＢＡ 含量呈显著负相关； 高产株型剑叶中超氧化物歧化酶（ＳＯＤ） 、过氧化物酶（ＰＯＤ） 活性高，丙二醛（ＭＤＡ） 含量低，剑叶光合强度与ＳＯＤ， ＰＯＤ 活性呈正相关，与ＭＤＡ 含量呈负相关； 高产株型籽粒中ｉＰＡ，ＺＲ，ＩＡＡ 和ＧＡ３ 含量高，ＡＢＡ 含量低，籽粒胚乳细胞数与花后７ ｄ 籽粒中ｉＰＡ，ＺＲ，ＩＡＡ 和ＧＡ３ 含量呈正相关，与ＡＢＡ 含量呈负相关，粒重与花后２１ ｄ 籽粒中ｉＰＡ，ＺＲ，ＩＡＡ 和ＧＡ３ 含量呈正相关，与ＡＢＡ 含量呈负相关； 高产株型的籽粒有较高的胚乳细胞数和粒重．
The high-yielding plant type of Yangmai 158 with a yield of more than 7 500 kg · hm -2 was selected as the research object to analyze the physiological characteristics of high-yielding plant type. The results showed that compared with medium- and low-yielding plant type, The contents of iPA, ZR, IAA and GA3 were significantly higher than those of iPA, ZR, IAA and GA3 (P <0.05), while there was a significant negative correlation between ABA content and ABA content. The activities of superoxide dismutase (SOD) and peroxidase (POD) in leaves of high yielding plants were high, and the contents of malondialdehyde (MDA) The results showed that there was a positive correlation between the activity of SOD and POD and the content of MDA and the content of iPA, ZR, IAA and GA3, ABA, There was a positive correlation between IAA and GA3 content and a negative correlation with ABA content Grain weight was positively correlated with iPA, ZR, IAA and GA3 seeds 21 d after anthesis, ABA was negatively correlated with the content; Grain yield a higher plant type number of endosperm cells and grain weight.