THE INFLUENCE OF DAYLENGTH ON FINAL LEAF NUMBER IN SPRING WHEAT

被引：59
作者：
BROOKING, IR
JAMIESON, PD
PORTER, JR
机构：
[1] NEW ZEALAND INST CROP & FOOD RES LTD,CHRISTCHURCH,NEW ZEALAND
[2] HORT & FOOD RES INST NEW ZEALAND,PALMERSTON NORTH,NEW ZEALAND
[3] ROYAL VET & AGR UNIV,DEPT AGR SCI,DK-2630 TASTRUP,DENMARK
来源：
FIELD CROPS RESEARCH | 1995年 / 41卷 / 03期
关键词：
PHENOLOGY; PHOTOPERIOD; WHEAT;
D O I：
10.1016/0378-4290(95)00014-H
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
The influence of daylength on final leaf number was determined in four field-sown wheat cultivars with no vernalisation requirement Leaf and primordium appearance was monitored in plots sown at two-month intervals during an annual cycle. The timing of the response to daylength varied substantially among cultivars. In one, final commitment of the last leaf primordium occurred close to the time of initiation of that primordium while, in another cultivar, commitment did not occur until terminal spikelet or later. In the other two cultivars, commitment occurred midway through spikelet initiation. Late timing of response to daylength is a useful adaptation that allows cultivars with no vernalisation response sown in autumn to set more leaves than when sown in spring, and hence to delay flowering. Based on the analysis, a simple iterative procedure was developed that successfully predicted final leaf number, the dares of appearance of the flag ligule and anthesis for one of the cultivars grown in an independent experiment.
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页码：155 / 165
页数：11
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