Effects of Gibberellic Acid Application after Anthesis on Seed Vigor of Indica Hybrid Rice (Oryza sativa L.)
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Sites and Hybrid Combinations
2.2. Field Experiments
2.3. Measurements of Seed Germination
2.3.1. Standard Germination Test
2.3.2. Cool Germination Test
2.3.3. Measurements of Stigma Vigor Index of Female Parent
third day + the out-crossing of fourth day)/the out-crossing of first day
2.3.4. Measurements of Seed Yield and Its Components
2.4. Data Analysis
3. Results
3.1. Variation in Seed Vigor with Gibberellic Acid (GA3) Application
3.2. Variation in Seed Yield and Its Components with Gibberellic Acid (GA3) Application
3.3. Variation in Stigma Vigor Index of Female Parent with Gibberellic Acid (GA3) Application
3.4. Linear Regression between Seed Vigor and Stigma Vigor Index
4. Discussion
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Year | Site | Indica Hybrid Combination | Female/Male | Sowing Date | Transplanting Date |
---|---|---|---|---|---|
2016 | Guidong | IIY-838 | II-32A | 05−07 | 06−03 |
R838 | 05−07 | 06−03 | |||
05−12 | 06−03 | ||||
Suining | LLY-1813 | Longke638S | 05−16 | 06−14 | |
R1813 | 04−15 | 05−25 | |||
04−23 | 05−25 | ||||
2017 | Guidong | IIY-838 | II-32A | 05−06 | 06−03 |
R838 | 05−06 | 06−03 | |||
05−12 | 06−03 | ||||
Ningyuan | YLY-9918 | Y58S | 05−27 | 06−11 | |
R928 | 05−18 | 06−11 | |||
05−25 | 06−11 |
Hybrid Combination | GA3 Dosage (g hm−2) | GP (%) | GE (%) | GI | VI | |
---|---|---|---|---|---|---|
2016 | LLY-1813 | CK | 67.0 ± 1.2b | 60.3 ± 0.3b | 26.9 ± 0.1a | 5.6 ± 0.1c |
15 | 72.0 ± 2.5ab | 65.3 ± 2.0ab | 27.4 ± 0.9a | 6.6 ± 0.2b | ||
30 | 75.7 ± 1.5a | 68.7 ± 2.3a | 29.0 ± 0.6a | 7.1 ± 0.2a | ||
IIY-838 | CK | 82.0 ± 0.6b | 79.7 ± 0.7b | 38.7 ± 0.5b | 10.2 ± 0.1b | |
15 | 84.7 ± 1.3b | 81.7 ± 1.3b | 40.5 ± 0.6ab | 11.0 ± 0.2b | ||
30 | 90.0 ± 1.5a | 88.0 ± 1.2a | 41.7 ± 0.8a | 12.4 ± 0.3a | ||
2017 | YLY-9918 | CK | 93.3 ± 0.9b | 69.0 ± 1.2b | 29.8 ± 0.5c | 6.7 ± 0.2c |
15 | 94.0 ± 1.2ab | 72.7 ± 1.2b | 31.5 ± 0.6b | 7.3 ± 0.2b | ||
30 | 97.0 ± 2.1a | 88.0 ± 0.6a | 36.0 ± 0.7a | 8.0 ± 0.3a | ||
IIY-838 | CK | 83.3 ± 1.2a | 80.3 ± 1.7a | 39.6 ± 0.6a | 9.0 ± 0.2b | |
15 | 85.0 ± 1.0a | 81.0 ± 0.6a | 40.5 ± 0.2a | 9.4 ± 0.1b | ||
30 | 88.0 ± 1.7a | 85.0 ± 1.7a | 40.8 ± 0.8a | 10.2 ± 0.2a |
Hybrid Combination | GA3 Dosage (g hm−2) | GP (%) | GE (%) | GI | VI |
---|---|---|---|---|---|
YLY-9918 | CK | 73.0 ± 1.5b | 55.0 ± 2.1b | 11.9 ± 0.2c | 0.9 ± 0.1b |
15 | 76.7 ± 2.2b | 72.7 ± 1.8a | 14.2 ± 0.4b | 1.1 ± 0.1b | |
30 | 82.3 ± 1.5a | 76.0 ± 2.0a | 15.6 ± 0.3a | 1.5 ± 0.1a | |
IIY-838 | CK | 60.3 ± 2.2b | 53.0 ± 2.5a | 10.5 ± 0.4b | 0.7 ± 0.1b |
15 | 63.7 ± 0.9b | 54.7 ± 0.9a | 11.0 ± 0.2ab | 0.8 ± 0.1ab | |
30 | 68.7 ± 0.9a | 57.3 ± 0.7a | 11.8 ± 0.1a | 1.1 ± 0.1a |
Hybrid Combination | GA3 Dosage (g hm−2) | No. of Panicles (× 104 hm−2) | Spikelets Per Panicle | 1000-Grain Weight (g) | Out-Crossing Rate (%) | Actual Yield (kg hm−2) |
---|---|---|---|---|---|---|
YLY-9918 | CK | 270.2 ± 0.6a | 128.2 ± 0.8a | 20.2 ± 0.1b | 32.0 ± 0.3c | 1748.7 ± 4.5c |
15 | 270.4 ± 0.7a | 130.1 ± 1.2a | 20.5 ± 0.4ab | 34.3 ± 0.3b | 1818.6 ± 6.1b | |
30 | 270.6 ± 0.2a | 129.8 ± 0.3a | 21.7 ± 0.2a | 35.8 ± 0.3a | 1860.6 ± 5.7a | |
IIY-838 | CK | 366.3 ± 0.8a | 109.0 ± 0.2a | 23.3 ± 0.2c | 59.8 ± 0.6b | 4719.0 ± 6.2b |
15 | 365.7 ± 0.6a | 109.3 ± 0.8a | 23.9 ± 0.2b | 59.5 ± 0.2b | 4723.6 ± 3.0b | |
30 | 365.8 ± 0.5a | 109.5 ± 0.5a | 24.8 ± 0.1a | 61.7 ± 0.2a | 4781.4 ± 2.1a |
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Wang, X.; Zheng, H.; Tang, Q.; Mo, W.; Ma, J. Effects of Gibberellic Acid Application after Anthesis on Seed Vigor of Indica Hybrid Rice (Oryza sativa L.). Agronomy 2019, 9, 861. https://doi.org/10.3390/agronomy9120861
Wang X, Zheng H, Tang Q, Mo W, Ma J. Effects of Gibberellic Acid Application after Anthesis on Seed Vigor of Indica Hybrid Rice (Oryza sativa L.). Agronomy. 2019; 9(12):861. https://doi.org/10.3390/agronomy9120861
Chicago/Turabian StyleWang, Xiaomin, Huabin Zheng, Qiyuan Tang, Wenwei Mo, and Junjie Ma. 2019. "Effects of Gibberellic Acid Application after Anthesis on Seed Vigor of Indica Hybrid Rice (Oryza sativa L.)" Agronomy 9, no. 12: 861. https://doi.org/10.3390/agronomy9120861