摘要
用两用核不育系农垦58S、5460S、W6154S 为试验材料,于1989～1990年分别在江西农大农学试验站(28°46′N)和赣州地区农科所(25°50′N)采用分期播种的方法,每隔10天一期,共10期进行试验.自见穗之日起,每天或隔日取出3～5cm 的穗子3～5个进行花粉镜检,并对镜检穗套袋,考查自交结实率;同时,另挂牌3～5个穗,成熟时考查自然结实率,整理出每天的气象记载资料,找出每日花粉不育率所对应的敏感期的光照长度(x_1)、日均温(x_2)、最高温(x_3)、最低温(x_4)、光期温(x_5)、暗期温(x_6)、光暗期温差(x_7)和相对湿度(x_8)的平均值.以这8个气象因素为自交量,花粉不育率为因变量,在微机上进行多元分析和通径分析.研究结果表明:1.两用核不育系农垦58S、5460S、W6154S 的育性转换是若干个气象因素综合作用的结果,且各气象因素之间存在着较强的交互作用.2.农垦58S 育性转换主要受控于光照长度,但日均温、光期温、光暗期温差,相对湿度对其育性转换都有较为重要的作用.对农垦58S 育性转换影响的直接效应大小依次为:光照长度、日均温、光期温、光暗期温差及相对湿度;间接效应最大的是光期温。其次为日均温、光暗期温差、相对湿度、光照长度.光期温通过日均温对农垦58S 花粉不育率的交互作用最大,其次为日均温通过光照长度对花粉不育率的交互作用.3.温度是诱导5460S 育性转换的主要因素.光照长度、光期温、暗期温、光暗期温差及相对湿度也有一定的作用.对5460S 花粉不育率的直接效应和间接效应大小为:光期温>暗期温>光暗期温差>光照长度>相对湿度.光期温和暗期温相互对花粉不育率的决定系数最大,其次为光期温和光暗期温差的决定系数.4.对W6154S 的育性转换的影响,也主要是温度.对其直接效应大小为:暗期温>最低温>日均温>光长.因此,两用核不育系的育性转换是受光、
The Dual-purpose Genic Male-sterile Line(i.e.DGML)of Nongken 58S、5460S、W6154S was used to study the main light、temperatune and humidity factors affecting fer-tility alteration,the direct and indirect effects of these factors on fertility under theinteraction among them.Results showed that:1.Fertility alteration is duo to the comprehensive effect of 8 light、temperatune andhumidity factors,and interaction among these factors is relatively strong.2.Light length is main factor in fertility alteration of Nongken 58S.The order of thedirect effect on Nongken 58S fertility was light length>daily mean temperature>day pe-riod temperature>difference in day and night period temperature>relative humidity.The indirect effect of day temperature is the greatest.The greatest interaction of these fac-tors is day temperatune and daily mean temperature.3.The orders of the direct and indirect effect on 5460S fertility were day temperature>night temperature>difference in day and night period temperature>light length>relative humidity.The main factor is temperature on 5460S fertility.4.The order of the direct effect on W6154S fertility was night temperature>mini-mum temperature>daily mean temperature>light length.So the temperature seems tobe the most important factor affecting the fertility alteration of W6154S.
出处
《江西农业大学学报》
CAS
CSCD
1993年第A01期42-43,共2页
Acta Agriculturae Universitatis Jiangxiensis
关键词
水稻
核不育系
光温反应
DGML
Light-temperature-humidity factors
Interaction
