摘要
1985年以来,发现4个亲缘系统的光钝感全雌性苎麻(简称 NG 苎麻)材料。若不砍杆,在荆州每个生长季节可以开3或4期花。栽后第1年,所有 NG 株系仅开雌花,但两年后,有的年份第1花期有极少雄花。第1花期后,如不割杆,新梢上只生雌花;若于6～8月砍割,则表现雌雄同株。NG型苎麻植株较矮,韧皮层较薄,鲜皮出麻率较低,但纤维极细。研究认为,该材料在苎麻育种中有重大的实用价值.也是研究光期反应、开花及性型的遗传与表达的良好材料.
Since 1985,day neutral gynoecious ramie materials(abbr.to NG ramie)from four relative systems have been discovered.The NG lines may present three or four flowering stages within one growing season in Jingzhou if their stems have not been cut off.All the NG lines can only produce female flowers in first growing season,but two or more years after they were planted,the NG lines may be out a few male flowers in first flowering stage in some years.Gynoecious flowers always occur on growing tops if they are not cut off after first flowering period,but cutting the stems from June to August,monecious plants will occur.The NG lines have a shorter plant height,thiner bast layer and lower fibre rate of fresh bark,but their fibre fineness is very high.It is considered that NG type is pretty useful for ramie breeding,equally,it is very advantageous to studying pho- toperiod-reaction and the heredity and expression of florescence and sexual types.
出处
《湖北农学院学报》
1993年第1期25-32,共8页
Journal of Hubei Agricultural College
关键词
苎麻
光周期
ramie [Boehmeria mivea (L.)Gaud.]
day neutral
gynoecious
