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Inheritance of Seed Dormancy in Weedy Rice

^a Plant Sci. Dep., North Dakota State Univ., Fargo, ND 58105 USA
^b Agricultural College, Yangzhou Univ., Yangzhou, 225008 China
^c USDA-ARS, Biosciences Research Lab., Fargo, ND 58105-5674, USA

View larger version (25K): [in a new window]   Fig. 1. Seed germination at 7 d after imbibition for dormant and nondormant parents and F1 generation in relation to the period of afterripening or days after harvest (DAH) for four crosses. Numbers in parentheses denote the estimated days of afterripening required to achieve 50% germination for the dormant parent and F1 generation.

View larger version (27K): [in a new window]   Fig. 2. Distribution of the F2 population and range of parental and F1 generations from the LD/‘WYJ’ cross for nonafterripened seed (A) and caryopsis (B) germination at 7 d after imbibition. The arrow is an assumed boundary of 40% segregating for the groups with lower and higher germination.

View larger version (32K): [in a new window]   Fig. 3. Distribution of the F2 population and range of parental and F1 generations from the crosses of ‘CO39’/SS18-2 (A) and ‘N22’/‘Dular’ (B) for germination at 7 d after imbibition of seeds at 20 d after harvest. The arrow is an assumed boundary of 45% segregating for the groups with lower and higher germination.