【摘要】 在广州市人控光温条件下的研究表明,籼S在广州(23°08′N)自然条件下,正常的播始历期最长104 d,最短为71 d,籼S播始历期的变化受温度的影响较大,籼S具有明显的感光性,光长对播始历期的影响有所不同,第一光周期的光长对播始历期的影响较第二光周期要大;以籼S为母本杂交F1的播始历期绝大多数比籼S短,且与父本更接近。更多还原

【Abstract】 Under natural conditions in Guangzhou,the normal period of Xian S from sowing to initial heading was from 71 to 104 days and its period of sowing to initial heading was effected greatly by the temperature.Xian S had obvious phototonus and the light length had different effect on the procreation period.The effect of the light length in first photoperiod was greater than that in second photoperiod.The period of F₁ hybrids from sowing to initial heading was mostly shorter than female parent Xian S and more similar to their male parents.更多还原