Assessment of groundnut under combined heat and drought stress
In semi-arid regions, particularly in the Sahel, water and high-temperature stress are serious constraints for groundnut production. Understanding of combined effects of heat and drought on physiological traits, yield and its attributes is of special significance for improving groundnut productivity...
| Autores principales: | , , |
|---|---|
| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2013
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/52086 |
| _version_ | 1855535051968610304 |
|---|---|
| author | Hamidou, F. Halilou, O. Vadez, Vincent |
| author_browse | Halilou, O. Hamidou, F. Vadez, Vincent |
| author_facet | Hamidou, F. Halilou, O. Vadez, Vincent |
| author_sort | Hamidou, F. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | In semi-arid regions, particularly in the Sahel, water and high-temperature stress are serious constraints for groundnut production. Understanding of combined effects of heat and drought on physiological traits, yield and its attributes is of special significance for improving groundnut productivity. Two hundred and sixty-eight groundnut genotypes were evaluated in four trials under both intermittent drought and fully irrigated conditions, two of the trial being exposed to moderate temperature, while the two other trials were exposed to high temperature. The objectives were to analyse the component of the genetic variance and their interactions with water treatment, year and environment (temperature) for agronomic characteristics, to select genotypes with high pod yield under hot- and moderate-temperature conditions, or both, and to identify traits conferring heat and/or drought tolerance. Strong effects of water treatment (Trt), genotype (G) and genotype-by-treatment (GxTrt) interaction were observed for pod yield (Py), haulm yield (Hy) and harvest index (HI). The pod yield decrease caused by drought stress was 72 % at high temperature and 55 % at moderate temperature. Pod yield under well-watered (WW) conditions did not decrease under high-temperature conditions. Haulm yield decrease caused by water stress (WS) was 34 % at high temperature and 42 % under moderate temperature. Haulm yield tended to increase under high temperature, especially in one season. A significant year effect and genotype-by-environment interaction (GxE) effect were also observed for the three traits under WW and WS treatments. The GGE biplots confirmed these large interactions and indicated that high yielding genotypes under moderate temperature were different to those at high temperature. However, several genotypes with relatively high yield across years and temperature environments could be identified under both WW and WS conditions. Correlation analysis between pod weight and traits measured during plant growth showed that the partition rate, that is, the proportion of dry matter partitioned into pods, was contributing in heat and drought tolerance and could be a reliable selection criterion for groundnut breeding programme. Groundnut sensitivity to high-temperature stress was in part related to the sensitivity of reproduction. |
| format | Journal Article |
| id | CGSpace52086 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace520862024-08-27T10:36:47Z Assessment of groundnut under combined heat and drought stress Hamidou, F. Halilou, O. Vadez, Vincent climate agriculture groundnuts genotypes drought stress heat stress In semi-arid regions, particularly in the Sahel, water and high-temperature stress are serious constraints for groundnut production. Understanding of combined effects of heat and drought on physiological traits, yield and its attributes is of special significance for improving groundnut productivity. Two hundred and sixty-eight groundnut genotypes were evaluated in four trials under both intermittent drought and fully irrigated conditions, two of the trial being exposed to moderate temperature, while the two other trials were exposed to high temperature. The objectives were to analyse the component of the genetic variance and their interactions with water treatment, year and environment (temperature) for agronomic characteristics, to select genotypes with high pod yield under hot- and moderate-temperature conditions, or both, and to identify traits conferring heat and/or drought tolerance. Strong effects of water treatment (Trt), genotype (G) and genotype-by-treatment (GxTrt) interaction were observed for pod yield (Py), haulm yield (Hy) and harvest index (HI). The pod yield decrease caused by drought stress was 72 % at high temperature and 55 % at moderate temperature. Pod yield under well-watered (WW) conditions did not decrease under high-temperature conditions. Haulm yield decrease caused by water stress (WS) was 34 % at high temperature and 42 % under moderate temperature. Haulm yield tended to increase under high temperature, especially in one season. A significant year effect and genotype-by-environment interaction (GxE) effect were also observed for the three traits under WW and WS treatments. The GGE biplots confirmed these large interactions and indicated that high yielding genotypes under moderate temperature were different to those at high temperature. However, several genotypes with relatively high yield across years and temperature environments could be identified under both WW and WS conditions. Correlation analysis between pod weight and traits measured during plant growth showed that the partition rate, that is, the proportion of dry matter partitioned into pods, was contributing in heat and drought tolerance and could be a reliable selection criterion for groundnut breeding programme. Groundnut sensitivity to high-temperature stress was in part related to the sensitivity of reproduction. 2013-02 2014-12-16T06:37:31Z 2014-12-16T06:37:31Z Journal Article https://hdl.handle.net/10568/52086 en Limited Access Wiley Hamidou F, Halilou, O, Vadez V. 2013. Assessment of groundnut under combined heat and drought stress. Journal of Agronomy and Crop Science 199(1):1-11 |
| spellingShingle | climate agriculture groundnuts genotypes drought stress heat stress Hamidou, F. Halilou, O. Vadez, Vincent Assessment of groundnut under combined heat and drought stress |
| title | Assessment of groundnut under combined heat and drought stress |
| title_full | Assessment of groundnut under combined heat and drought stress |
| title_fullStr | Assessment of groundnut under combined heat and drought stress |
| title_full_unstemmed | Assessment of groundnut under combined heat and drought stress |
| title_short | Assessment of groundnut under combined heat and drought stress |
| title_sort | assessment of groundnut under combined heat and drought stress |
| topic | climate agriculture groundnuts genotypes drought stress heat stress |
| url | https://hdl.handle.net/10568/52086 |
| work_keys_str_mv | AT hamidouf assessmentofgroundnutundercombinedheatanddroughtstress AT halilouo assessmentofgroundnutundercombinedheatanddroughtstress AT vadezvincent assessmentofgroundnutundercombinedheatanddroughtstress |