Cotton Science  2005£¬17(2)£º94-98

 

Genetic Analysis of Main Agronomic Traits in Short Season
Upland Cotton (G.hirsutum L.)

SONG Mei-zhen£¬YU Shu-xun*£¬FAN Shu-li, RUAN Ri-hong, HUANG Zhen-mao
£¨Cotton Research Institute, CAAS, Key Laboratory of Cotton Genetic Improvement, Ministry of Agriculture, Anyang 455004£¬He¡änan, China£© ª¤ª¤

Abstract£ºFive short season cultivars (SSC) with no premature senescence were selected to cross with 5 SSC cultivars with premature senescence. The parents, F1 and F2 from the reciprocal crosses were tested in replicated trials in 2001 and 2002. The results indicated that seed yield, lint yield and lint index existed significant dominant effects. Addition effects and epistasis¡ÁEnvironment effects also existed significantly. Boll weight and bolls existed dominant effects. Traits relative with the earliness existed significant additive effects, dominant effects, such as the plant growing period, date of first flower, boll maturation period and the situation of first fruit branch. However, the other earliness traits controlled by significant dominant¡ÁEnvironment effects and additive¡Áadditive epistasis effects, such as lint percentage before frost, and by additive¡Áadditive epistasis effects, such as defoliation percentage, and by additive effects, such as defoliation index. Traits relative with the fiber quality existed significant additive effects, dominant effects, additive¡ÁEnvironment and epistasis¡ÁEnvironment effects, such as fiber length, specific strength and elongate percentage. We also studied the genotypic and phenotypic correlations between yield, earliness and fiber quality.
Key words£ºshort season cultivars£»early maturity without senescence£»agronom
ic
           traits£»genetic analysis    [Full Text, 2080KB]