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| Characteristics of Rice Plant with Heavy Panicle | |
| 作者姓名： | MA Jun MA Wen-bo MING Dong-feng YANG Shi-ming ZHU Qing-sen |
| 作者单位： | [1]Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130, P.R. China [2]Key Laboratory of Southwest Crop Genetic Resources and Improvement, Ministry of Education/Sichuan Agricultural University, Yaan 625014, P.R.China [3]Zaozhuang Agriculture Bureau, Shandong Province, Zaozhuang 277160, P.R.China [4]Zaozhuang Teacher College, Zaozhuang 277160, P.R. China [5]College of Agronomy, Yangzhou University, Yangzhou 225009, P.R.China |
| 基金项目： | Acknowledgements This work was supported by the Program for Changjiang Scholars and Innovative Research Team in University, China （IRT0453）. |
| 摘 要： | Using 15 indica rice varieties with different panicle weight, some ideal plant type characteristics in heavy panicle type of hybrid rice （HPT） and their relation to yield and its components were studied. Results showed that the leaf area index （LAI） of the HPT varieties was lower than that of medium panicle type （MPT） and light panicle type （LPT） varieties, but its decreasing rate of LAI and efficient LAI after heading was slower and had much higher percentage of efficient LAI, specific leaf weight, and ratio of grain to leaf area （cm^2） in comparison with the MPT and the LPT varieties. The length, width, thickness, and area of top three leaves of the HPT varieties were significantly larger than those of the MPT and the LPT varieties, and these components of top three leaves were significantly and positively correlated with the number of spikelets and filled grains, grain weight per panicle, and grain yield. The flag leaf in HPT varieties was erect with sorrow leaf angle, and their leaf angle of 2nd and 3rd leaf from top increased in sequence. The plant height of the HPT varieties was higher than that of the MPT and the LPT varieties, and their leaf site of top three leaves also increased in sequence. Therefore, HPT varieties as an ideal plant type could increase the utilization efficiency of sunlight energy. The ideal plant type characteristics and their adjuncts for the HPT varieties are proposed in this article. |
| 关 键 词： | 重圆锥花序 超高产水稻 植物类型性状 育种模式 |
Characteristics of Rice Plant with Heavy Panicle |
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| MA Jun MA Wen-bo MING Dong-feng YANG Shi-ming ZHU Qing-sen.Characteristics of Rice Plant with Heavy Panicle[J].Agricultural Sciences in China,2006,5(12):911-918. | |
| Authors: | MA Jun MA Wen-bo MING Dong-feng YANG Shi-ming ZHU Qing-sen |
| Institution: | 1. Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130, P.R. China;Key Laboratory of Southwest Crop Genetic Resources and Improvement, Ministry of Education/Sichuan Agricultural University, Yaan 625014, P.R. China 2. Zaozhuang Agriculture Bureau, Shandong Province, Zaozhuang 277160, P.R. China 3. Zaozhuang Teacher College, Zaozhuang 277160, P.R. China 4. College of Agronomy, Yangzhou University, Yangzhou 225009, P.R. China |
| Abstract: | Using 15 indica rice varieties with different panicle weight, some ideal plant type characteristics in heavy panicle type of hybrid rice (HPT) and their relation to yield and its components were studied. Results showed that the leaf area index (LAI) of the HPT varieties was lower than that of medium panicle type (MPT) and light panicle type (LPT) varieties, but its decreasing rate of LAI and efficient LAI after heading was slower and had much higher percentage of efficient LAI, specific leaf weight, and ratio of grain to leaf area (cm2) in comparison with the MPT and the LPT varieties. The length, width, thickness, and area of top three leaves of the HPT varieties were significantly larger than those of the MPT and the LPT varieties, and these components of top three leaves were significantly and positively correlated with the number of spikelets and filled grains, grain weight per panicle, and grain yield. The flag leaf in HPT varieties was erect with sorrow leaf angle, and their leaf angle of 2nd and 3rd leaf from top increased in sequence. The plant height of the HPT varieties was higher than that of the MPT and the LPT varieties, and their leaf site of top three leaves also increased in sequence. Therefore, HPT varieties as an ideal plant type could increase the utilization efficiency of sunlight energy. The ideal plant type characteristics and their adjuncts for the HPT varieties are proposed in this article. |
| Keywords: | heavy panicle type rice plant type characteristics |
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