Water yam (Dioscorea alata L.) development as affected by photoperiod and temperature: Experiment and modeling
type: Dataset
description: Water yam (Dioscorea alata L.) is one of the most Popular tuber crops in the tropics. Although it is well known that photoperiod greatly affects yam development, little information is available on the effect of temperature on different developmental phases, and there has been no attempt to model the effect of both environmental factors. The aim of this study was to assess the combined effect of photoperiod and temperature on the development of two early maturing varieties of yam with similar growth pattern. For this We used a model proposed for potatoes grown under tropical conditions. Experimental information was obtained from 15 field experiments carried out in Guadeloupe (French West Indies) covering a wide range of planting dates. Two yam phases were analyzed: from emergence (EM) to tuber initiation (TI), and from TI to harvest (HA). The EM-HA period varied from 3 to 6 months, with the longer cycles corresponding to early planting dates (e.g. April). On average, EM-TI represented one-third of the EM-HA period, and was mainly affected by photoperiod and to a lesser extent by temperature. Both factors also affected the duration of TI-HA but their effects were less noticeable. The observed mean temperature during TI-HA was near the estimated optimum and its effect was less than that of photoperiod. The variation of the phase duration was higher for EM-TI (CV 45%) than for TI-HA (8%), which was satisfactorily explained by the model, For EM-TI there was a positive interaction between both environmental factors which, together with the greater influence of climatic conditions, resulted in much variability in its duration. For TI-HA, a small influence of environmental factors, coupled with a compensatory effect between environmental factors, resulted in a relatively smaller variation in the duration of this phase. The model estimated satisfactorily the dates and the duration of each phase. The root mean square error (RMSE) was 7.4 d which corresponded to 13% and 7% of …
landing page: 0378-4290
keyword: developmental-phases
keyword: ecophysiologie
keyword: igname-ailee
keyword: infoeu-reposemanticsarticle
keyword: journal-articles
keyword: model
keyword: planting-date
keyword: sdvsalife-sciences-q-bioagricultural-sciences
keyword: tropical-climate
keyword: tuber-crop
issued: 2026-05-05T21:26:20.662407
modified: 2026-05-05T21:26:20.662411
language: en
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Water yam (Dioscorea alata L.) development as affected by photoperiod and temperature: Experiment and modeling
type: Distribution
format: HTML
access URL: https://hal.science/hal-00964692
issued: 2026-05-05T21:26:20.690602
modified: 2026-05-05T21:26:20.650807