Survey for genetic resources in tropical rootcrops in relation to drought resistance

与抗旱相关的热带块根作物遗传资源调查

基本信息

批准号：
13575032
负责人：
YAMAUCHI Akira
金额：
$ 8.19万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13575032/
关键词：
Ipomoea batatas Cassava Manihot esculenta Grants Water use Water stress Water use efficiency Sweetpotato Drouoht tolerance Manihot esculenta Crantz 根

项目摘要

This research was conducted in collaboration with Philippine Root Crop Research and Training Center, Leyte State University to evaluate genotypic variation in cassava and sweetpotato in drought tolerance and to identify the traits that are closely related to the tolerance. In addition to the collection of the Center, we further collected a number of genotypes from several drought-prone areas m the Philippines.Sevearl surveys among the rootcrop growing Canners indicated that the question on decision-making strategies by farmers on sustained adoption of a variety is different from the question of preference to grow a certain variety. The former involves more than just traits preference ; and includes other considerations, such as resources, availability of planting materials, use and market, perceived or actual physical or environmental constraints, etc., which is a subject for futher study.Under water stress, dry matter is a product of water use (WU) and water use efficiency (WUE). Based. on this concept, the growth responses of 28 cassava genotypes and 18 sweelpotato genotypes to water stress were examined in a series of pot experimentsIn cassava, drought significantly reduced dry matter production. Results of a correlation analysis indicate that the genotypic variation in dry matter response to drought was better explained by that in WUE than in WU. In sweetpotato, dry matter production was also significantly reduced in droughted plants. The drought treatment significantly reduced WU, while it scarcely affected WUE. These facts clearly show that the reduction of WU but not WUE caused dry matter reduction, which is opposite to the case of cassava.The results of a series of field experiments generally support those obtained by the pot experiments, which are necessary to validated by the evaluation of Genotype x Environment Interaction in further study.

这项研究是与莱特州立大学（Leyte State University）与菲律宾根农作物研究和培训中心合作进行的，以评估木薯和甜蜜的耐旱性耐受性的基因型变异，并确定与耐受性密切相关的特征。除了收集该中心外，我们还从菲律宾的几个易于干旱地区收集了许多基因型。种植根包生长的罐装罐头中的Sevearl调查表明，农民对持续采用多样性的决策策略的问题与种植某种品种的偏好问题不同。前者不仅涉及特质偏好。并包括其他考虑因素，例如资源，种植材料的可用性，使用和市场，可感知或实际的物理或环境限制等，这是进行研究的主题。在水压力下，干物质是用水量（WU）的产物（WU）和用水效率（WUE）。基于。在这个概念上，在一系列木薯中，研究了28种木薯基因型和18种Sweelpotato基因型对水胁迫的生长反应，干旱显着降低了干物质生产。相关分析的结果表明，干物质对干旱反应中的基因型变化比在WU中更好地解释了干旱。在Sweetpotato中，干物质的生产也大大降低了。干旱处理大大减少了WU，而它几乎不会影响Wue。这些事实清楚地表明，WU的减少而不是WUE导致干物质的减少，这与木薯相反。一系列野外实验的结果通常支持POT实验获得的，这是通过在进一步研究中对基因型X环境相互作用的评估进行验证所必需的。