Narrative
Arkot 05 l 7HG displays the high glanding (HG) trait which is expressed by gossypol glands found in the calyx lobes. Other morphological traits of Arkot 05 l 7HG are similar to 'DP 393' (check cultivar), except Arkot 05 I 7HG has higher density of trichomes on leaves (leaf pubescence), but lower density of trichomes on stems (stem pubescence) and on the margins of bracts. Over 20 replicated field tests at four sites in Arkansas, lint yields of Arkot 0517HG were equal to lint yields of DP393, but were 9% higher at Judd Hill and Marianna (silt loam soils in north Arkansas). Compared to DP 393, lint yields of Arkot 05 l 7HG were produced with fewer seed per area, but higher weight of lint per seed (lint index), seed size (seed index), fibers per seed, and fiber density (estimated number of fibers per unit area of seed surface). Compared to DP 393, Arkot 05 l 7HG produced higher lint index (8.3 vs. 7 .5 g), seed index (12.3 vs. 11.4 g), fibers per seed (14% more), fiber density (8.6% more), Q-score (67 vs 51), and fiber length (31.0 vs. 30.2 mm); equal plant height, open boll percentage, lint percentage, length uniformity index, fiber strength, and fiber elongation; and lower seed per area (6.6% fewer) and micronaire (4.49 vs. 4.80). Arkot 0517HG is resistance to all U.S. races ofXanthomonas citri ssp. malvacearum (ex Smith 1901) Schaad et al. 2007, the causal agent of bacterial blight. Its high glanding trait should provide Arkot 0517HG some resistance to boll feeding lepidopteria. In field tests, it demonstrated tolerance to VerticiJlium wilt (caused by Verticillium dahliae Kleb.). Response of Arkot 0517HG to fusarium wilt [caused by Fusarium oxysporum Schlect. F. sp. vasinfectum (Atk.) Snyd. and Hans.] was equal to the resistant check, M-315.Notes:1. Plants, from which seed were produced, were evaluated and determined to be free of Bt (BG 1 and BGII) and RR Flex transgenes.2. Delinted seed were inadvertently treated with Evergol Prime (0.32ozlcwt), Vortex FL (0.08ozlcwt), Allegiance FL (0.75ozlcwt), and Gaucho 600 (6 ozlcwt). Treated seed were washed thoroughly but some red dye is visible on micropylar ends of seed.