摘要
利用纬度相近而海拔差异大的两个试点,辅以短日照处理作光温反应试验,基本弄清了广西稻种的感光性、感温性和短日高温生育性及光温反应型,据此可在籼粳两亚种之下划分为钝感光和感光两大生态群,以取代按种植季节区分早中晚稻的方法,使分类更确切和便于比较应用。广西稻种的光温反应型有18种之多,富有遗传多样性和蕴藏有适应不同生态条件的种质可供利用。广西籼稻和水稻的感光性和感温性分别强于粳稻和陆稻,而其短日高温生育性则反然。广西存在早粳,广西的深水稻和夹根稻均属感光生态群。
By the photo-thermo-response test complemented with short day treatment on two sites with similar latitude and different elevations,the photosensitivity, thermosensitivity of short day and high thermal growth trait and 'photo-thermo-response patteins' (PTRP)of Guangxi rice were basically understood. As a result of our experiment, a suggestion is made that the subspecies of Hsien (Indica) and Keng (Japonica) could be classified into non-photonasly and photonasty ecogroups and that supersedes old method to divide them into early, middle and late rice according to their planted season, rendering the classification be more precise and more convenience for comparison and utilization. There are 18 types of 'PTRT' in Guangxi local rice, they showed more gen tic diversities and widely environmental adaptabilitiy, and more germplasms could be used. The photosensitivity and thermosensitivity of Hsien (Indica) and Paddy rice are stronger than those of Keng (Japannica) and dryland rice, on the contrary, the basic vegetative period(BVP)is different The result showed There exists early season Keng in Guangxi,and the deepwater rice and the mixed rice in Guangxi are belong to the strong photosensitivity.
出处
《西南农业学报》
CSCD
1993年第3期1-8,共8页
Southwest China Journal of Agricultural Sciences
基金
国家自然科学基金项目
关键词
光温反应型
分类
稻种
资源
Rice Photothermoresponse pattern Classification Guangxi Province
