Relationships between changes of kernel nutritive components and seed vigor during development stages of F1 seeds of sh 2 sweet corn |
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| Authors: | Dong-dong Cao Jin Hu Xin-xian Huang Xian-ju Wang Ya-jing Guan and Zhou-fei Wang |
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| Institution: | (1) Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310029, China;(2) State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China |
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| Abstract: | The changes of kernel nutritive components and seed vigor in F1 seeds of sh
2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series
regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while
starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination,
germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d after
pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters
determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between
seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content
and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that
the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing
sugar in sweet corn seeds during seed development stages.
Project supported by the National Natural Science Foundation of China (No. 30370911) and Education Department of Zhejiang
Province, China (No. 20070147) |
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| Keywords: | Sh 2 sweet corn Kernel nutritive component Seed vigor Time series regression (TSR) analysis |
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