Studies on Transgressive Segregation in F2 Generation in Deshi Cotton (Gossypium arboreum L.
The identification of transgressive segregants for economically important trait such as seed cotton yield along with quality is an important aspect of any practical breeding programme. The F2 of three diverse cotton (Gossypium spp. crosses were evaluated for the number of transgressive segregation. The experimental material consisted of six diverse parents involving three crosses. Female parent's viz. JLA 794, AKA 7 and PA 183 were crossed with male parents viz.,JLA 505, PA 255 and PA 710. The F2 of cross JLA 794 x JLA 505 exhibited the highest frequency of transgressive segregants for seed cotton yield per plant (39) followed by AKA 7 x PA 255 (32) and PA 183 x PA 710 (26) Plant No. 92 (F2) was the most transgressive sergeant in cross no. one (JLA 794 x JLA 505) for seed cotton yield, recording 82.2% higher seed cotton yield in addition to higher intensity of expression for sympodia per plant, bolls per plant and ginning percentage. The transgressive segregants in plant no. 42 was the most promising in cross no.two (AKA 7 x PA 255) which out yielded the parent by 79.7% in addition to higher intensity of expression for sympodia per plant, bolls per plant, average boll weight and ginning percentage. In cross three (PA 183 x PA 710) plant no. 103 out yielded the increasing parent by 82.87% in addition to higher intensity of expression for sympodia per plant, bolls per plant and halo length.
International Journal of Pure Applied Bioscience