Submitted to: Plant Breeding
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/22/1999
Publication Date: 2/1/2000
Citation: Interpretive Summary: Seven pairs of cotton lines that differed only for glanded (the normal condition with pigmented glands containing gossypol) vs. glandless were tested for the differences in agronomic, fiber, and seed characteristics. There were no significant differences between glanded and glandless lines for agronomic or fiber properties. The glandless lines had improved seed quality. They all had lower gossypol (a toxic chemical naturally residing in the cotton plant and seed), and they tended to have more oil and proteins.
Technical Abstract: 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.