棉 花 学 报    Cotton Science   2006，18(2)：74-78

Study on Heterosis and Parent-offspring Correlation between Supper Fibre Varieties and Insect-resistant Transgenic Varieties in Upland Cotton
TANG Wen-wu^1，2，XIAO Wen-jun¹，HUANG Ying-jin^1*，WU Xiu-lan^1，2
(1.College of Agronomy，Jiangxi Agricultural University，Nanchang 330045，China；2.Department of biology ， Zhaoqing University，Zhaoqing 526061，China)

Abstract：62 cross combinations were made between 32 supper fibre varieties and 8 insect-resistant transgenic varieties，the heterosis and parent-offspring correlation were analyzed. The result showed that F₁ hybrids had remarkable yield heterosis. The boll weight has the highest heterosis，lint percentage was the second importance，while boll number and seed index has negative heterosis among the yield components. Fiber quality traits in F₁ hybrids had low mid-parents heterosis，but had high comparative heterosis. The positive correlation between F₁hybrids and males，females in boll weight and fiber quality characters were significant at 0.05 levels，respectively. Positive correlation between F₁ hybrids and males in gross period ，lint percentage were significant at 0.05 levels ， positive correlation between F₁ hybrids and females in number of fruit branches was significant at 0.05 levels.
Key word：insect-resistant cotton；heterosis；parent-offspring correlation    [Full Text,2044KB]