关于耐密型玉米杂交种几个外观性状指标讨论

STUDIES ON PLANT CHARACTERISTICS OF HIGH-DENSITIVE-TOLERANCE VARIETIES OF MAIZE

摘要:

通过对8个玉米杂交种的最佳产量密度与植株外观性状、穗粒性状的相关分析,结果表明:1.玉米杂交种的最佳产量密度与叶面积是呈相关,与茎上叶片角度、叶向值呈正相关,与顶部叶、穗位上叶平均值、全株平均值的相关系数绝对值、回归系数较高。2.最佳产量密度与穗粒重、穗粒数、穗长的表型值呈负相关,与百粒重表型值呈正相关,与百粒重、穗粒重、穗粒数的变异系数呈负相关,与穗长的变异系数无相关性。

Abstract:

Suitable plant density for the highest yield (SPDHY) and the characteristics of plant and ear were analysised, using 8 maize single-crosses. The resuts were that:
A. SPDHY was negatively correlatsd with leaf area, and positively correlated with leaf angle ard leaf orientation value. The value of the relationship coefficenths between SPDHY and the lower leaves of plant was low, but the value of the coefficients of SPDHY with blag leaf, average leaf area above the ear and of whole plant was high.
B. SPDHY was negatively correlated with kernal weight per ear, kernal number per ear, ear length and variation coefficients of 100-kernal weight, kernal weight per ear and kernal number per ear, positively correlated with 100-kernal weight, and was not correlated with variation coefficient of ear length.