Grain filling duration,a crucial determinant of genotypic variation of grain yield in field-grown tropical irrigated rice |
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| Authors: | Woonho Yang Shaobing Peng Maribel L Dionisio-Sese Rebecca C Laza Romeo M Visperas |
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| Institution: | 1. Crop Physiology and Ecology Research Division, National Institute of Crop Science (NICS), Rural Development Administration (RDA), 209 Seodundong, Suwon 441-857, Republic of Korea;2. Crop and Environmental Sciences Division, International Rice Research Institute (IRRI), DAPO Box 7777, Metro Manila, Philippines;3. Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines, Los Baños, College, Laguna 4031, Philippines |
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| Abstract: | Grain filling, a crucial determinant of grain yield in cereal crops, is characterized by duration and rate of grain filling. This study aimed to (1) seek genotypic variations in grain filling duration and rate on area basis, (2) compare the contribution of grain filling duration and rate to grain yield and (3) examine the influence of temperature and solar radiation on grain filling duration and rate for effective grain filling period in the field-grown tropical irrigated rice. Six tropical genotypes were used in the 2004 dry season and wet season at the International Rice Research Institute (IRRI), Laguna, Philippines. |
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| Keywords: | Rice Grain filling duration Grain filling rate Temperature Solar radiation |
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