Effects of the dominant glandless gene Gl2e on agronomic and fibre characters of Upland cotton.

Seven pairs of near-isogenic lines (glandless vs. glanded) and the recurrent parents were used to determine the effects of the dominant glandless gene from ‘Hai 1’ (Gossypium barbadense) on agronomic, fibre, and seed characters in Upland cotton, Gossypium hirsutum, backgrounds. The results showed that there were no apparent linkage associations of the glandless gene on most agronomic, fibre and seed characters of Upland cotton, except for seed quality. The glandless line derived from ‘Liaomian 7’ had significantly more protein (489.6 g/kg), and that from H237 had significantly more oil (362.4 g/kg) and had the largest oil index (2.70 g) and protein index (3.03 g). The gossypol content of seed in dominant glandless lines in Upland cotton was very low (<0.04 g/kg). Therefore, it is suggested that the glandless gene can play an important role in breeding glandless or low seed-gossypol Upland cotton cultivars. [ABSTRACT FROM AUTHOR]