【摘要】 测量浙江省粳稻区试所用的12个水稻品系叶片指标,发现水稻株高非常接近,茎叶夹角相似,对照品种杂交籼稻与这12个品种差异较大。采用二次函数建立模型,拟合归一化的叶片形态,建立水稻叶片器官库。归一化处理后品种间叶片大小以及形状表现出一致的规律性,叶位越高,最大宽越偏向于基部,叶位越低,越远离基部。所选13个品种的叶型系数可以统一设置为0.73,但是品种之间和同一品种内部不同位置的叶片叶型系数差异极显著,统计分析表明,同一品种不同位置的叶片叶型系数差异(P=1.95e-11)大于不同品种同一位置的叶型系数(P=4.89e-3),表明目前育种上水稻形态有趋同的趋势。更多还原

【Abstract】 Twelve conventional japonica rice cultivars,which were newly bred in Zhejiang province,were planted,observed and measured. The structures of these rice cultivars were similar,such as plant height,blade angles,etc.While the control cultivar,an indica hybrid rice cultivar,had significant differences with japonica rice cultivars. The quadratic function was used to simulate and analyze the normilized blade shape. The shape was different between two genetic groups,and the size of the blades was different among rice cultivars,but the blade shape was similar when normalized. By quadratic model,it was found that in all the cultivars the largest width was close to leaf bottom in the upper leaf,and was close to leaf tip in the lower leaf. The leaf shape coefficients of all these cultivars were similar and could be set as 0. 73,but there were still significant differences among different cultivars and different blade positions in the same cultivar. The p value was 1. 95e- 11 in positions and 4. 89e- 3in cultivars.更多还原