Genotypic variation in the grain photosynthetic contribution to grain filling in rice
| Autor: | Yingbin Zou, Fangbo Cao, Yu Liu, Min Huang, Zhengwu Xiao, Hailin Li, Shuanglü Shan, Salah Fatouh Abou-Elwafa, Zui Tao, Jiana Chen, Tao Lei |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Chlorophyll Genotype Physiology Plant Science Grain filling Biology Photosynthesis 01 natural sciences Crop 03 medical and health sciences chemistry.chemical_compound Cultivar Genetic Variation Oryza Photosynthetic capacity Plant Breeding 030104 developmental biology Agronomy chemistry Grain yield Positive relationship Edible Grain Agronomy and Crop Science Biomarkers 010606 plant biology & botany |
| Zdroj: | Journal of plant physiology. 253 |
| ISSN: | 1618-1328 |
| Popis: | Grain filling in rice, a staple cereal crop worldwide, is a critical determinant of grain yield and quality. However, there is little available information on the relationship between grain filling and grain photosynthetic capacity in rice. This study evaluated the genetic diversity among six rice cultivars for their grain filling rate (GR0) and the relationships with the grain chlorophyll contents and grain net photosynthetic rate (PN). Significant variations in GR0, PN, and the chlorophyll contents (a, b, and total) in the grains of the cultivars were observed. Approximately 90 % of the variation in GR0 was explained by the grain PN. General linear model regression revealed significant positive correlations between PN/GR0 and the chlorophyll contents (a, b, and total) in the grains. There was also a significant positive correlation between PN and GR0. These positive correlations suggest a direct positive relationship between the grain filling rate and grain chlorophyll contents, which is indicative of the high photosynthetic capacity of the grains during the early grain filling period. These results suggest that the grain chlorophyll contents could be used as a molecular marker in marker-assisted breeding programs for rice cultivars with high grain net photosynthetic capacity during the early period of grain filling to improve grain yield. |
| Databáze: | OpenAIRE |
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