Heading Uniformity: A New Comprehensive Indicator of Rice Population Quality
Productive tiller percentage (PTP) is the only available comprehensive indicator of rice population quality. However, productive panicle number (PN) has a great effect on its characterization accuracy. Panicle exsertion is an important but difficult to describe morphological index; therefore, it can...
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| Format: | Article |
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MDPI AG
2021-08-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/11/8/770 |
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| author | Chuanhai Shu Feijie Li Dongdong Liu Jian Qin Mingtian Wang Yongjian Sun Na Li Jun Ma Zhiyuan Yang |
| author_facet | Chuanhai Shu Feijie Li Dongdong Liu Jian Qin Mingtian Wang Yongjian Sun Na Li Jun Ma Zhiyuan Yang |
| author_sort | Chuanhai Shu |
| collection | DOAJ |
| description | Productive tiller percentage (PTP) is the only available comprehensive indicator of rice population quality. However, productive panicle number (PN) has a great effect on its characterization accuracy. Panicle exsertion is an important but difficult to describe morphological index; therefore, it cannot be easily determined. The aims of this study were to develop heading uniformity (HU), which describes the difference in the degree of rice panicle exsertion, as a new comprehensive indicator by designing a representative sampling and calculation method and exploring the relationship between HU and yield components. HU first decreased then increased after initial heading, exhibiting a single-valley curve. Adequate HU was obtained by panicle sampling on day two or three (panicle N fertilizer proportion ≤40 or >40%) after initial heading. The explanatory power of PTP for grain yield variance was markedly insufficient in low- and high-PN rice populations. Compared with the percent contribution of PTP to grain yield variance (12.32–41.26%), that of HU (49.02–61.93%) was greater and more stable across rice populations of different PNs. Moreover, HU showed fewer interannual variations, despite large interannual differences in weather and soil conditions. Hence, HU may have applications as a comprehensive indicator of rice population quality. |
| first_indexed | 2024-03-10T09:06:36Z |
| format | Article |
| id | doaj.art-bfc41b8835684661a7afd6ee89bc1980 |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-10T09:06:36Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-bfc41b8835684661a7afd6ee89bc19802023-11-22T06:23:26ZengMDPI AGAgriculture2077-04722021-08-0111877010.3390/agriculture11080770Heading Uniformity: A New Comprehensive Indicator of Rice Population QualityChuanhai Shu0Feijie Li1Dongdong Liu2Jian Qin3Mingtian Wang4Yongjian Sun5Na Li6Jun Ma7Zhiyuan Yang8Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, ChinaCrop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, ChinaCollege of Agronomy, Sichuan Agricultural University, Chengdu 611130, ChinaInstitute of Rice and Sorghum, Sichuan Academy of Agricultural Sciences, Deyang 618000, ChinaSichuan Provincial Meteorological Service, Chengdu 610072, ChinaCrop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, ChinaCrop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, ChinaCrop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, ChinaCrop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, ChinaProductive tiller percentage (PTP) is the only available comprehensive indicator of rice population quality. However, productive panicle number (PN) has a great effect on its characterization accuracy. Panicle exsertion is an important but difficult to describe morphological index; therefore, it cannot be easily determined. The aims of this study were to develop heading uniformity (HU), which describes the difference in the degree of rice panicle exsertion, as a new comprehensive indicator by designing a representative sampling and calculation method and exploring the relationship between HU and yield components. HU first decreased then increased after initial heading, exhibiting a single-valley curve. Adequate HU was obtained by panicle sampling on day two or three (panicle N fertilizer proportion ≤40 or >40%) after initial heading. The explanatory power of PTP for grain yield variance was markedly insufficient in low- and high-PN rice populations. Compared with the percent contribution of PTP to grain yield variance (12.32–41.26%), that of HU (49.02–61.93%) was greater and more stable across rice populations of different PNs. Moreover, HU showed fewer interannual variations, despite large interannual differences in weather and soil conditions. Hence, HU may have applications as a comprehensive indicator of rice population quality.https://www.mdpi.com/2077-0472/11/8/770rice population qualityheading uniformitypanicle numberproductive tiller percentagegrain yield |
| spellingShingle | Chuanhai Shu Feijie Li Dongdong Liu Jian Qin Mingtian Wang Yongjian Sun Na Li Jun Ma Zhiyuan Yang Heading Uniformity: A New Comprehensive Indicator of Rice Population Quality Agriculture rice population quality heading uniformity panicle number productive tiller percentage grain yield |
| title | Heading Uniformity: A New Comprehensive Indicator of Rice Population Quality |
| title_full | Heading Uniformity: A New Comprehensive Indicator of Rice Population Quality |
| title_fullStr | Heading Uniformity: A New Comprehensive Indicator of Rice Population Quality |
| title_full_unstemmed | Heading Uniformity: A New Comprehensive Indicator of Rice Population Quality |
| title_short | Heading Uniformity: A New Comprehensive Indicator of Rice Population Quality |
| title_sort | heading uniformity a new comprehensive indicator of rice population quality |
| topic | rice population quality heading uniformity panicle number productive tiller percentage grain yield |
| url | https://www.mdpi.com/2077-0472/11/8/770 |
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