棉 花 学 报      Cotton Science     2009，21(5)：415-419

Analysis on Combining Ability and Genetic Effects between Super Fibre Varieties and Insect-resistant Transgenic Varieties in Upland Cotton
TANG Wen-wu^1，2，HUANG Ying-jin^1*，WU Xiu-lan^1，2，XIAO Wen-jun¹
(1.College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China; 2.Depart of Biology, Zhaoqing University, Zhaoqing，Jiangxi 526061, China)

Abstract：Combining ability and genetic effects of yield and fiber quality characters were investigated by way of 10×6 NCII cross design with 10 super fiber varieties and 6 insect-resistant transgenic varieties. The results showed that, Bt gene was dominant inheritance in F₁ hybrids. A₈ showed the best general combining ability (GCA) in yield characters, A₄expressed the best GCA in fiber quality characters. Combinations of A₇× B₅, A₆×B₁ expressed higher specific combining ability(SCA). But the GCA of parents and SCA of combination have no significant correlation. Genetic effects analysis showed that the additive variation was principal in boll weight (BW), lint percentage (LP), span length (SL), fiber strength (FS), elongation rate (ER). While seed cotton yield (SCY) and lint yield (LY) mainly by their interactions. SL, BW and FS had high narrow heritability (H_N²), while SCY and LY were had low H_N².
Key words：insect-resistant hybrid cotton；combining ability；heritability     [Full Text, 2182KB]