摘要
在乳熟期对玉米单交种‘黔单16’的株高、穗位高、茎粗、穗位叶长与宽进行基于单株的调查时发现:相对于其他农艺性状之间的关系,穗位叶宽与茎粗之间有更为一致的变化趋势,且这种一致性在不同小区间表现稳定。为了验证二者之间一致的变化趋势是否在不同玉米材料上普遍存在,以及明确二者相互关系的性质特点,于是对正在进行试验的其他5个玉米单交种、2个玉米开放授粉群体的以上农艺性状进行了基于单株的同样考察。结果表明:所有材料的穗位叶宽与茎粗都在0.001水平上达到了直线正相关,而其他农艺性状之间的直线相关系数则呈现较大的波动性;同时,单交种的相关系数大于群体,如果用穗位叶宽与茎粗的比值来描述二者之间的关系特点,则不同材料的这一比值具有极显著差异。考察结果一致说明:玉米乳熟期穗位叶宽与茎粗之间存在发育上的高度一致性;如果以穗位叶宽与茎粗的比值来描述二者的关系特点,则这一值因遗传背景不同而有极显著差异;二者之间发育上的直线相关性及同一遗传背景下的比值不因密度等环境不同而发生改变。
The ear-leaf and stem of maize affect directly yield of corn plant,so it is important to determine the interplay between the ear-leaf and the stem.Six maize single-cross hybrids of ＇ Qiandan 16 ＇,＇ Guidan 8 ＇,＇ Qianhuanuo ＇,＇ Denghai 11 ＇,＇ Xianyu 335 ＇,＇ Zhengdan 958 ＇ and two maize populations of ＇ Pingtanghuang ＇,＇ Zhongqun 11 ＇ were planted to study the correlation between the ear-leaf and the stem.At the end of the growing period,plant height,ear height,stem diameter,ear-leaf length,ear-leaf breadth were measured on the basis of corn plant.The results showed that the ear-leaf breadth had significant correlations with stem diameter（P 0.001） in total materials while the correlations between other economical characters were unstable.On the other hand,single-cross hybrids had more significant correlation between ear-leaf breadth and stem diameter than populations;the ratio between ear-leaf breadth and stem diameter was stable in the same material but different in the different materials.All these results showed that in Guiyang region at the end of growing maize ear-leaf breadth had markedly consistency with stem diameter;the consistency was changeless in total materials and the ratio was convertible in different materials;the consistency and the ratio were determined by heredity.
出处
《中国农学通报》
CSCD
北大核心
2011年第9期126-132,共7页
Chinese Agricultural Science Bulletin
关键词
玉米
单交种
群体
穗位叶宽
茎粗
相关性
maize
single-cross hybrid
population
stem diameter
ear-leaf breadth
correlation
