An Quantitative Analysis of High Temperature Effects During Meiosis Stage on Rice Grain Number per Panicle

doi:10.16819/j.1001-7216.2017.7032

Abstract

Abstract:

【Objective】Grain number per panicle is one of yield component factors for rice. In order to analyze the effect of high temperature on the grain number per panicle and develop the quantitative model to evaluate it, 【Method】a pot experiment under different high temperatures and durations during meiosis stage was conducted with Liangyoupeijiu and Nanjing 45 as materials in 2014–2015. 【Result】Grain number per panicle decreased with the rising temperature and prolonging duration exposed to high temperature. The relationship between grain number per panicle and temperature could be expressed with a quadratic equation. The terminal time of grain number per panicle sensitive to high temperature was five days before heading date. The validation result showed the model could better simulate the effect of high temperature during meiosis stage on the grain number per panicle with rRMSE 0.094 and 0.085 for Liangyoupeijiu and Nanjing 45, respectively. 【Conclusion】This study would help improve the quantitative effect of high temperature on rice growth duration.

Key words: rice, meiosis stage, high temperature, grain number per panicle, quantitative model

摘要：

【目的】穗粒数是水稻产量构成因子之一。为明确减数分裂期高温对水稻穗粒数的可能影响,构建其定量估算模型,【方法】于2014–2015年以两优培九和南粳45为供试材料,于减数分裂期设置不同强度和持续时间的高温处理,以自然无高温环境为对照,分析了减数分裂期不同高温强度和高温持续时间对穗粒数的影响,建立了减数分裂期高温与穗粒数的定量关系,最后根据温度日变化特征,构建了自然环境下的减数分裂期高温对穗粒数的定量影响算法。【结果】减数分裂期高温对穗粒数的影响程度与高温强度、持续时间有关。同样高温条件下,穗粒数随高温持续天数增加呈指数减少;日相对穗粒数随温度增加而减少,可用二次曲线进行描述。穗粒数对高温敏感的终止时间大约为抽穗前5 d。利用2015年试验资料对上述模型进行了检验,两优培九和南粳45穗粒数模拟值的相对均方根差为0.094和0.085,说明模型可很好地模拟减数期高温对穗粒数的影响。【结论】对完善高温对水稻生长过程的定量影响具有重要作用。

关键词: 水稻, 减数分裂期, 高温, 穗粒数, 定量模型

CLC Number:

S511.01
S313

Chunlin SHI, Zongqiang LUO, Min JIANG, Yongle SHI, Yingxue LI, Shouli XUAN, Yang LIU, Shenbin YANG, Gengkang YU. An Quantitative Analysis of High Temperature Effects During Meiosis Stage on Rice Grain Number per Panicle[J]. Chinese Journal OF Rice Science, 2017, 31(6): 658-664.

石春林, 骆宗强, 江敏, 侍永乐, 李映雪, 宣守丽, 刘杨, 杨沈斌, 于庚康. 减数分裂期高温对水稻穗粒数影响的定量分析[J]. 中国水稻科学, 2017, 31(6): 658-664.

Figures/Tables 6

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品种 Material	高温持续天数 Duration / d	高温处理时间(月-日) Start-stop time of high temperature treatment(Month-Day)		对照抽穗期 Heading date of CK
品种 Material	高温持续天数 Duration / d	2014	2015	2014	2015
两优培九 Liangyoupeijiu	1	08-13–08-13	08-11–08-11	08-27	08-20
	3	08-13–08-15	08-11–08-13
	5(2014), 6(2015)	08-13–08-17	08-11–08-16
	7	08-13–08-19
南粳45 Nanjing 45	1	08-09–08-09	08-14–08-14	08-24	08-23
	3	08-09–08-11	08-14–08-16
	5(2014), 6(2015)	08-09–08-13	08-14–08-19
	7	08-09–08-15

品种 Material	高温持续天数 Duration / d	高温处理时间(月-日) Start-stop time of high temperature treatment(Month-Day)		对照抽穗期 Heading date of CK
品种 Material	高温持续天数 Duration / d	2014	2015	2014	2015
两优培九 Liangyoupeijiu	1	08-13–08-13	08-11–08-11	08-27	08-20
	3	08-13–08-15	08-11–08-13
	5(2014), 6(2015)	08-13–08-17	08-11–08-16
	7	08-13–08-19
南粳45 Nanjing 45	1	08-09–08-09	08-14–08-14	08-24	08-23
	3	08-09–08-11	08-14–08-16
	5(2014), 6(2015)	08-09–08-13	08-14–08-19
	7	08-09–08-15

温度Temperature/℃	两优培九 Liangyoupeijiu			南粳45 Nanjing 45
温度Temperature/℃	a	b	R²	a	b	R²
35	0.98754	–0.03151	0.91719	0.97232	–0.03817	0.96581
38	1.03890	–0.05202	0.89389	0.99642	–0.05532	0.99070
41	0.99856	–0.06597	0.85639	0.98988	–0.09562	0.94214

温度Temperature/℃	两优培九 Liangyoupeijiu			南粳45 Nanjing 45
温度Temperature/℃	a	b	R²	a	b	R²
35	0.98754	–0.03151	0.91719	0.97232	–0.03817	0.96581
38	1.03890	–0.05202	0.89389	0.99642	–0.05532	0.99070
41	0.99856	–0.06597	0.85639	0.98988	–0.09562	0.94214

处理Treatment		两优培九 Liangyoupeijiu		南粳45 Nanjing 45
温度 Temperature/℃	持续天数 Duration/d	实测值 Observed value	模拟值 Simulated value	实测值 Observed value	模拟值 Simulated value
35	1	143.4	146.9	89.8	91.3
	3	142.9	136.8	81.9	84.4
	6	133.2	123.0	78.9	75.0
38	1	139.4	142.2	88.8	88.4
	3	135.9	123.9	80.6	76.7
	6	125.2	100.8	70.3	61.9
41	1	130.0	135.8	83.9	84.8
	3	114.1	107.9	72.1	67.7
	6	94.7	76.4	65.0	48.3