ÃÞ »¨ ѧ ±¨    Cotton   Science   2010£¬22£¨1£©£º83-88

 

 

 

Genetic Analysis for Developmental Behavior of Boll Number Per Plant in Island Cotton
GUO Wei-feng, CAO Xin-chuan, HU Shou-lin£¬MEI Yong-jun
(Research Institute of Cotton£¬Tarim University£¬Alar, Xinjiang 843300, China)

Abstract: An additive-dominant-maternal model with genotype¡Áenvironment interaction was applied to analyze developmental genetics for the boll number per plant at different stages in two years. The experimental data were obtained from seven island cotton varieties and their 21 F1 crosses. It was showed that genetic main and G¡ÁE effects were predominant at the early boll stage.Additive and dominant effects reduced at the middle stage while D¡ÁE and M¡ÁE effects increased continually. At the late boll stage G¡ÁE effects increased to maximum at August 2, it reduced gradually since then but played a more important role than other effects. Gene expression was very active during prior stage of bolling to July 17. Significant unconditional positive correlation was detected for the same genetic effect while conditional correlation was positive or negative. The combination of two analytic methods can explain clearly the gene expression feature for developmental behavior of boll number per plant. The results showed that the genetic developmental features of boll number per plant are different from upland cotton in island cotton.
Key words: island cotton; ADM genetic model; boll number per plant; conditional genetic
correlation             [Full Text, 267KB]