The forecast of sterile alteration for the temperature-sensitive genic male sterile （TGMS） line in two-line hybrid rice seed production was traditionally based on screen temperature determined by weather station. Th...The forecast of sterile alteration for the temperature-sensitive genic male sterile （TGMS） line in two-line hybrid rice seed production was traditionally based on screen temperature determined by weather station. The article put forward a new approach based on plant temperature, which was more exact and direct than the traditional method. The result of the simulation of the self-seeded setting rate of a widely used TGMS line, Peiai64S, by several temperature parameters and durations, showed that the fertility was directly affected by the plant temperature at a height of 20 cm or the air temperature around it in three days duration. Using the stem temperature of three days at a height of 20 cm as the simulation parameter, the fertility of Peiai64S had the maximum, minimum and optimum temperatures as 22.8, 21.7 and 22.5℃, respectively, whereas 23.2, 21.5 and 21.8℃ when using the air temperature of three days around the height of 20 cm as the parameter. Such temperature indices can be used to conclude the sterile alteration of TGMS for safeguarding seed production of twoline hybrid rice. The article also established a statistic model to conclude plant temperature by water temperatures at inflow and outflow, and air temperature and cloudage from weather station.展开更多
BS型小麦光温敏雄性不育系(简称不育系)是二系法杂交小麦应用的核心,为了研究日温差(以下简称温差)对不育系育性的影响,提升不育系安全制种和高效繁种,以5份不育系(BS102、BS107、BS135、BS185和BS278)和常规品种京411为材料,利用多生...BS型小麦光温敏雄性不育系(简称不育系)是二系法杂交小麦应用的核心,为了研究日温差(以下简称温差)对不育系育性的影响,提升不育系安全制种和高效繁种,以5份不育系(BS102、BS107、BS135、BS185和BS278)和常规品种京411为材料,利用多生态区分期播种试验结合人工气候箱光温调控试验,研究不育系的安全制种繁种播期,以及在不同温差条件下,比较不育系育性及农艺性状差异,分析温差与结实率及农艺性状相关性。结果表明,在北京顺义不育系繁种区,不育系BS185的安全繁种播期为10月10-20日,不育系BS135为10月15-20日,不育系BS102、BS107和BS278为10月20日。在河南邓州不育系制种区,5个不育系在10月5-25日播种时高度不育,均能够安全制种,其中BS102和BS107安全制种播期可达到10月30日。不育系在12 h 12℃(制种区光温条件)不同温差条件下,BS102和BS135受温差影响较小,制种安全性较好;BS107和BS185在温差10和15℃均可以安全制种,BS278在温差5、10和15℃可安全制种;温差与不育系结实率呈负相关,与株高和穗长呈正相关。不育系在14 h 16℃(繁种区光温条件)不同温差条件下,BS102和BS278受温差影响较小,BS107、BS135和BS185受温差影响较大,在温差10和15℃可以有效繁种;温差与不育系结实率呈正相关,与多数不育系株高呈正相关。说明提升温差更利于不育系的安全制种和高效繁种。展开更多
以水稻温敏核不育系孟S为材料,利用海拔100,700和1 000 m 3个不同的海拔高度设立不同温度梯度的3个环境,在自然条件下种植大群体,通过对比育性检测,筛选不育起点温度比原群体更低的单株。结果表明,经过3次选择,孟S不育起点温度由24℃降...以水稻温敏核不育系孟S为材料,利用海拔100,700和1 000 m 3个不同的海拔高度设立不同温度梯度的3个环境,在自然条件下种植大群体,通过对比育性检测,筛选不育起点温度比原群体更低的单株。结果表明,经过3次选择,孟S不育起点温度由24℃降到了23℃。展开更多
文摘The forecast of sterile alteration for the temperature-sensitive genic male sterile （TGMS） line in two-line hybrid rice seed production was traditionally based on screen temperature determined by weather station. The article put forward a new approach based on plant temperature, which was more exact and direct than the traditional method. The result of the simulation of the self-seeded setting rate of a widely used TGMS line, Peiai64S, by several temperature parameters and durations, showed that the fertility was directly affected by the plant temperature at a height of 20 cm or the air temperature around it in three days duration. Using the stem temperature of three days at a height of 20 cm as the simulation parameter, the fertility of Peiai64S had the maximum, minimum and optimum temperatures as 22.8, 21.7 and 22.5℃, respectively, whereas 23.2, 21.5 and 21.8℃ when using the air temperature of three days around the height of 20 cm as the parameter. Such temperature indices can be used to conclude the sterile alteration of TGMS for safeguarding seed production of twoline hybrid rice. The article also established a statistic model to conclude plant temperature by water temperatures at inflow and outflow, and air temperature and cloudage from weather station.
文摘BS型小麦光温敏雄性不育系(简称不育系)是二系法杂交小麦应用的核心,为了研究日温差(以下简称温差)对不育系育性的影响,提升不育系安全制种和高效繁种,以5份不育系(BS102、BS107、BS135、BS185和BS278)和常规品种京411为材料,利用多生态区分期播种试验结合人工气候箱光温调控试验,研究不育系的安全制种繁种播期,以及在不同温差条件下,比较不育系育性及农艺性状差异,分析温差与结实率及农艺性状相关性。结果表明,在北京顺义不育系繁种区,不育系BS185的安全繁种播期为10月10-20日,不育系BS135为10月15-20日,不育系BS102、BS107和BS278为10月20日。在河南邓州不育系制种区,5个不育系在10月5-25日播种时高度不育,均能够安全制种,其中BS102和BS107安全制种播期可达到10月30日。不育系在12 h 12℃(制种区光温条件)不同温差条件下,BS102和BS135受温差影响较小,制种安全性较好;BS107和BS185在温差10和15℃均可以安全制种,BS278在温差5、10和15℃可安全制种;温差与不育系结实率呈负相关,与株高和穗长呈正相关。不育系在14 h 16℃(繁种区光温条件)不同温差条件下,BS102和BS278受温差影响较小,BS107、BS135和BS185受温差影响较大,在温差10和15℃可以有效繁种;温差与不育系结实率呈正相关,与多数不育系株高呈正相关。说明提升温差更利于不育系的安全制种和高效繁种。
