Comparison of the occurrence of kernel damage in rice plants grown in a heated greenhouse and in a paddy field of high temperature year
Comparison of the occurrence of kernel damage in rice plants grown in a heated greenhouse and in a paddy field of high temperature year
复制标题
DOI：
10.1626/jcs.71.174
复制
发表时间：
2002-06-01
影响因子：
--
通讯作者：
Suga, R
中科院分区：
文献类型：
--
作者：
Iida, Y;Yokota, K;Suga, R
比较了高温年份温室和大田条件下水稻热害粒、白背粒、基白粒和乳白粒的百分率，以检验温室观测是否能反映田间条件下水稻品种的耐害性差异。12个品种的水稻，被认为具有不同程度的耐受性，由于高温损害的内核，栽培在温室中的长凳（70厘米高，15厘米深）充满稻田土壤。在抽穗至成熟期间，将植株暴露于27.6 - 28.3 ℃的高温下（昼夜温度：29.7 - 30.1 ℃/25.3 - 26.3 ℃）。在成熟时，在每个品种的8个植株中计算白背或基白色籽粒和乳白色籽粒的百分比。不同品种在高温下白背和基白粒的发生率差异显著（P < 0.05）。在1999年夏季高温持续的情况下，温室和稻田中这些籽粒的发生之间存在显着的正相关。乳白色籽粒的发生没有显著的品种间差异。结果表明，白背粒率和基白粒率可作为小麦耐高温性的指标。因此，我们认为越越濑（抗病）、小光町（中抗）、秋田町（中抗）、一目播（中感）和初保（感病）5个品种可以作为耐病指示品种。
The percentages of the number of heat-damaged kernels, white-back or basal-white kernels and milky-white kernels in a heated greenhouse were compared with those in a paddy field in a high-temperature year to examine whether the greenhouse observation could represent the varietal difference in the tolerance to the damages in the field condition. Twelve varieties of rice, considered to have various degrees of tolerance to kernel damage due to high temperature, were cultivated in the greenhouse on benches (70cm high, 15cm deep) filled with paddy field soil. The plants were exposed to high temperatures of 27.6similar to28.3degreesC (day/night temperature : 29.7similar to30.1degrees0/25.3similar to26.3degreesCX) during the period from heading to maturity. At maturity, the percentages of white-back or basal-white kernels and milky-white kernels were counted in eight plants of each variety. A significant difference (P < 0.05) in the percentage of occurrence of white-back or basal-white kernels was recognized among varieties exposed to high temperatures in the greenhouse. There was a significant positive correlation between the occurrence of these kernels in the greenhouse and in the paddy field in 1999 when high-temperature days continued during summer. There was no significant varietal difference in the occurrence of milky-white kernels. These results suggested that the percentages of white-back and basal-white kernels were appropriate indicators and the tolerance to high temperature. We proposed that five varieties, Koshijiwase (resistant), Kokoromachi (moderately resistant), Akitakomachi (moderate), Hitomebore (moderately sensitive) and Hatsuboshi (sensitive) could be the indicator varieties to the tolerance.