1. Abdalla AMA, Abou-El-Zahab AA, Radwan SRH (1999) Combining ability for yield and earliness of Pima × Egyptian cotton cultivars crosses. In: Proceedings beltwide cotton conferences, Orlando, Florida, USA, 3–7 Jan 1999. 1: pp 473-477
2. Abo El-Zahab AA, Metwaly HN (1979) Heterosis and combining ability in Egyptian cotton, Gossypium barbadense L. Zeitschrift fur Pflanzenzuchtung 82:45–69
3. Campbell BT, Bowman DT, Weaver DB (2008) Heterotic effects in topcrosses of modern and obsolete cotton cultivars. Crop Sci 48:593–600
4. Davis DD (1978) Hybrid cotton: specific problems and potentials. Adv Agron 30:129–157
5. Dong H, Tang W, Zhang D (2004) Development of hybrid Bt cotton in China: a successful integration of transgenic technology and conventional techniques. Curr Sci 86:778–782