棉 花 学 报 Cotton Science 2006，18(4)：204-208
Studies on a Thermo-sensitive Male Sterility Cotton Variety Temian S-1 and Its Utilization Abstract：The growth and development trait，and cross-pollination characteristics and its hybridization combining ability of Temian S-1，a thermo-sensitive male sterility cotton variety were studied in2002－2004.The trial was arranged in accordance to the design of randomly plots and three replications in each plot.The results were as follows：The growth phase (from seedling to the first open boll) of Temian S-1 was about 120 days. It was about 4 or 5 days from sowing to seedling，and the period from seedling to squaring varied from 40 days to 50 days in different tests. Based on continuous 3 years observation，the length of sterile stage varied with external climatic conditions，the male sterility appearances were at the third node of the first branch and the first nodes of the second and third branches and in the middle of July，and the sterile period ended in the last ten days of August. It was about 42 days from beginning to ending period，which was similar among different years and the period was the best time for hybrid seeds producing. There is no obvious difference in setting ratio among different days of the sterile period ， but there is obvious difference among different pollination times in the same day at 0.01 level，10 or 11 am is the best time for pollination. Seven hybrid variety were obtained with Temian S-1 as parents in 2003，Nongza 310 and 313 were two better varieties.
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