查看文章

Red rice samples were obtained in 1992 from Arkansas, Louisiana, Mississippi, and Texas. Nineteen ecotypes including eleven strawhull, five blackhull, two goldhull, and one brownhull were hand-transplanted in the field for phenological studies in comparison to rice cultivars' Lemont','Mars', and'Maybelle'. Forty-two different plant and seed traits were evaluated. Most ecotypes were uniform and stable, but with considerable amount of genetic variability among ecotypes. Averaged, ecotypes flowered three to five days later than rice, but 12 reached 50% anthesis at the same time or earlier than'Lemont'. Most ecotypes had high and early seed shattering and strong dormancy. Some ecotypes had plant characters closely related to rice cultivars, such as erect and glabrous leaves, resistance to shattering, and long, glabrous grains.