以超级杂交一季中稻高产攻关第一、二、三、四期标志性品种两优培九、Y两优1号、Y两优2号、Y两优900及第五期攻关品种超优千号为试验材料,采用4种典型的光合模型对参试品种齐穂期剑叶光合光响应曲线进行了拟合,并对各品种气孔导度和水分利用效率的光响应曲线进行了比较。结果表明,直角双曲线模型、非直角双曲线模型、直角双曲线修正模型及指数函数模型对参试5个品种的光合光响应曲线都可以拟合,决定系数R2均大于0.99;直角双曲线修正模型拟合得到的光合参数与实测值最接近;光能利用率以超优千号和Y两优900最高,剑叶净光合速率(光合能力)以Y两优900最强,光饱和点以Y两优900和Y两优1号最高,暗呼吸速率即光合产物消耗以Y两优900和两优培九最大;气孔导度除Y两优2号随光强增加增长缓慢外,其他4个品种均增长较快,但未出现气孔关闭现象,对强光表现出良好适应性;参试品种水分利用率WUE在光照强度小于800 μmol/(m2·s)时,随光照强度增加而表现为直线升高,当光照强度继续增加,WUE增长缓慢并逐渐趋于稳定,但Y两优900的WUE仍表现出增长态势。因此,Y两优900在光照强度大、日照时数长的地区种植,仍有较大的增产潜力。
The typical varieties (Liangyoupeijiu, Y Liangyou 1, Y Liangyou 2, Y Liangyou 900, Chaoyouqianhao) of the super hybrid rice program in different phase were used in this study. Four typical models of photosynthesis light response curve(rectangular hyperbolic model, non-rectangular hyperbolic model, modified rectangular hyperbolic model, and exponential function)were adopted to fit the photosynthesis light response curve of five rice varieties. The results showed that, all the four models could well fit the photosynthesis light response curves of the five rice varieties(R2>0.99); modified rectangular hyperbolic model had better fitting results in terms of conformity with measured values; the light use efficiency of Y Liangyou 900 and Chaoyouqianhao were highest, Y Liangyou 900 had the highest net photosynthesis rate, the light saturation point of Y Liangyou 900 and Y Liangyou 1 were highest, the dark respiration rate of Y Liangyou 900 and Liangyoupeijiu were highest, and the photosynthetic products were the most consumed. Except Y Liangyou 2, the stomatal conductance of other four varieties were grown faster, and not found stomatal; the water use efficiency of the tested varieties showed a straight line increasement with the increasement of light intensity when the light intensity was less than 800 mmol/(m2·s). When the light intensity continued to increase, the WUE grew slowly and gradually became stable, but Y Liangyou 900 showed still growth. Therefore, in the bright light intensity and long sunshine hours planting areas, there is still a greater yield potential for Y Liangyou 900.
[1] 谢华安,张建福,王乌齐,等. 超级稻育种实践和前景[J]. 分子植物育种,2006,4(3):4-10.
[2] 谢华安. 华南型超级稻育种及其技术研究进展[J]. 沈阳农业大学学报,2007,38(5):714-718.
[3] 袁隆平.中国杂交水稻的研究与发展[J]. 科技导报,2016,34(20):64-65.
[4] 王志琴,杨建昌,朱庆森. 土壤水分对水稻光合速率与物质运转的影响[J]. 中国水稻科学,1996,10(4):235-240.
[5] 杨建昌,朱庆森,曹显祖. 水稻群体冠层结构与光合特性对产量形成作用的研究[J]. 中国农业科学,1992,25(4):7-14.
[6] 邓启云.广适性水稻光温敏不育系 Y58S 的选育[J]. 杂交水稻,2005,20(2):15-18.
[7] 邓启云,袁隆平,蔡义东,等. 超级杂交稻模式株型的光合优势[J]. 作物学报,2006,32(9):1 287-1 293.
[8] 袁隆平. 选育超高产杂交水稻的进一步设想[J]. 杂交水稻,2012,27(6):1-2.
[9] 吕川根,邹江石. 两个超级杂交稻与汕优 63 光合株型的比较分析[J]. 中国农业科学, 2003,36(6):633-639.
[10] 程式华. 我国超级稻育种的理论与实践[J]. 中国农技推广,2005( 4):27-29.
[11] Chang S, Chang T, Song Q, et al. Photosynthetic and Agronomic Traits of an Elite Hybrid Rice Y-liang-you 900 with a Record-high Yield[J]. Field Crop Res, 2016, 187: 49-57.
[12] 滕振宁,方宝华,刘洋,等. 镉对不同品种水稻光合作用的影响[J]. 中国农业气象, 2016,37(5):538-544.
[13] 王满莲,冯玉龙,李新. 紫茎泽兰和飞机草的形态和光合特性对磷营养的响应[J]. 应用生态学报,2006,17(4):602-606.
[14] 黄红英,窦新永,孙蓓育,等. 两种不同生态型麻疯树夏季光合特性的比较[J]. 生态学报,2009,29(6):2 861-2 867.
[15] 陈卫英,陈真勇,罗辅燕,等. 光响应曲线的指数改进模型与常用模型比较[J]. 植物生态学报,2012,36(12):1 277-1 285.
[16] 邓云鹏,雷静品,潘磊,等. 不同种源栓皮栎光响应曲线的模型拟合及参数比较[J]. 生态学杂志,2016,35(2):387-394.
[17] 王海珍,韩路,徐雅丽,等. 干旱胁迫下胡杨光合光响应过程模拟与模型比较[J]. 生态 学报,2017,37(7):2 315-2 324.
[18] 叶子飘,于强.光合作用光响应模型的比较[J]. 植物生态学报,2008,32(6):1 356-1 361.
[19] Xu Z, Hu T, Zhang Y. Effects of Experimental Warming on Phenology, Growth and Gas Exchange of Treeline Birch (Betula utilis) Saplings, Eastern Tibetan Plateau, China[J]. Eur J For Res, 2012, 131(3): 811-819.
[20] Wargent J J, Elfadly E M, Moore J P, et al. Increased Exposure to Uv‐b Radiation During Early Development Leads to Enhanced Photoprotection and Improved Long‐term Performance in Lactuca sativa[J]. Plant, Cell Environ, 2011, 34(8): 1 401-1 413.
[21] Zu Y, Wei X, Yu J, et al. Responses in the Physiology and Biochemistry of Korean Pine (Pinus koraiensis) Under Supplementary Uv-b Radiation[J]. Photosynthetica, 2011, 49(3): 448-458.
[22] 庄文,李诚,常硕其,等. 超级杂交稻冠层形态结构与干物质生产特性研究[J]. 杂交水稻,2016,31(4):67-70.