ÃÞ »¨ ѧ ±¨ Cotton Science 2009£¬21(3)£º230-235
Study on Biological Characteristics of Bt Transgenic Cotton SCRC 21 With High and Stable Yielding Capacity Abstract£ºThe biological characters of Bt transgenic cotton variety SCRC 21 were studied by comparing with different type of cotton varieties¡ªBt transgenic hybrid variety SCRC 15,transgenic double genes( Bt+CpTI ) variety CCRI 41 and US Bt transgenic variety 99B.The results showed that both the nutrition growth speed and dry weight per plant of SCRC 21 were higher during the early stage.The dry weight per plant of SCRC 21 was 2.2% higher than that of SCRC 15,59.0% and 62.0% higher than that of CCRI 41 and 99B, respectively.The reproductive growth speed of SCRC 21 speeded up after blooming,and bolls were set up rapidly.The full growth period of SCRC 21 was 3~5 d shorter than that of CCRI 41 and 99B.SCRC 21 had a larger boll size,as well as higher lint percentage and larger boll number per plant than that of other varieties.Therefore, the yield components of SCRC 21 were improved simultaneously.SCRC 21 could set up source rapidly first and then enlarge sink and had abundant source with broad sink finally,and also early mature without premature senescence.The results indicated that the nutrition growth harmonized with reproductive growth well on SCRC 21.These biological characters of SCRC 21 establish a foundation for higher and it's stable yield and wide adaptability.
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