改变光温条件对水稻生育期特性变异的影响

改变光温条件对水稻生育期特性变异的影响 EFFECTS OF CHANGING LIGHT AND TEMPERATURE CONDITIONS ON VARIATION OF GROWTH DURATION IN RICE 王明全 Wang Mingquan and Song Yunchun first-author 宋运淳 <正> 生育期是作物的一个重要遗传特性,其长短是受遗传性和光温条件所制约的。改变光温条件可以使生育期发生变化,如水稻在同年播种实验中,在某个播期某些品种的抽穗期范围可延长4个月之久;在人工光温条件处理时也有类似情况。这种处理当代生育期变化的现象,有人称之为"种群的分解"或"种群变异性"或"光周期反应规范的隐藏的变异性"。然而对于这种变异的遗传效果则研究甚少。近年来异地、异期繁殖已在研究工作中广泛被采用,异地、异期繁殖改变了作物生育的光温条件,这种改变能否引起生育期的变异,这种变异能否遗传是值得注意的一个问题,它 In abnormal regions and sowing dates heading may prolong for a month or so in the same cultivar of rice, This phenomenon resembles the segregation of hybrids. We call it "decomposition". In this article decomposition of heading dates and its genetic efficiencies were investigated with some rice cultivars. In some of them decomposition appeared, Heading date of the decomposed early individual of cultivar IR 28 was 16 days earlier than that of the control. So were the progemes. It shows that it is possible to transmit the variation of growth duration caused by the decomposition to the progenies. 1981-04-01 2021-04-01 4