Photothermal adaptation of sorghum (Sorghum bicolour) in Nigeria
Photothermal adaptation of sorghum (Sorghum bicolour) in Nigeria
复制标题
DOI：
10.1016/s0168-1923(01)00241-6
复制
发表时间：
2001-06-25
影响因子：
6.2
通讯作者：
Qi, AM
中科院分区：
文献类型：
--
作者：
Craufurd, PQ;Qi, AM
高粱是西非季节性干旱稀树草原的重要作物，生长期为< 100 to >200天。当地适应的cvs花在年底的雨季，无论播种日期，研究报告在这里：（i）重新分析了一个播种日期的实验种植在萨马鲁，尼日利亚的Kassam和安德鲁斯在七十年代初，以测试是否物候和开花日期的稳态高粱可以解释的光热模型;以及（ii）在尼日利亚，通过使用光热模型模拟来自纬度6 - 14 °的基因型从播种到开花的持续时间，研究了北纬8 - 13 °的四个地点的物候适应性度N在西非使用光周期和20年的日平均温度和降雨量数据。物候分为四个阶段：诱导前或少年;穗起始开花;开花到成熟，所有调制的温度;和诱导阶段，调制的温度和光周期。诱导期的持续时间是从播种到成熟的持续时间变化的主要决定因素。Kassam和Andrews播种的SK 5912品种对光周期反应强烈，当平均光周期> 13 h时，诱导期的热持续时间增加2115生长度日（GDD）/h光周期。这些模拟解释了在品种原产地的纬度上，开花是如何在降雨结束前不久发生的，而与播种日期无关。(C)2001爱思唯尔科技有限公司。保留所有权利。
Sorghum is an important crop of the seasonally dry savannas of West Africa adapted to growing periods of < 100 to > 200 days. Locally adapted cvs flower at the end of the rains irrespective of sowing date, Research reported here; (i) reanalysed a sowing date experiment planted at Samaru, Nigeria by Kassam and Andrews in the early seventies to test whether phenology and homeostasis of flowering date in sorghum can be explained by a photothermal model; and (ii) investigated phenological adaptation in Nigeria at four locations between 8 and 13 degreesN by simulating using a photothermal model the duration from sowing to flowering of genotypes originating from latitudes between 6 and 14 degreesN in West Africa using photoperiod and 20 years of daily mean temperature and rainfall data. Phenology was separated into four phases: pre-inductive or juvenile; panicle initiation to flowering; and flowering to maturity, all modulated by temperature; and an inductive phase, modulated by both temperature and photoperiod. The duration of the inductive phase was the major determinant of variation in duration from sowing to maturity. Cultivar SK5912 sown by Kassam and Andrews was acutely sensitive to photoperiod and the thermal duration of the inductive phase was increased by 2115 growing degree days (GDD)/h photoperiod when mean photoperiod is > 13 h. The simulations explained how flowering is timed to occur shortly before the end of the rains at the latitudes of cultivar origin, irrespective of sowing date. (C) 2001 Elsevier Science B.V. All rights reserved.