scholarly journals Evaluation of Ethiopian Common Bean (Phaseolus vulgaris L.) Genotypes Under Terminal Drought Stress Condition

2021 ◽  
Vol 3 (1) ◽  
pp. 71-78
Author(s):  
Selamawit Abebe Gitore
Keyword(s):  
Drought Stress ◽  
Common Bean ◽  
Analysis Of Variance ◽  
Geometric Mean ◽  
Stress Conditions ◽  
Terminal Drought ◽  
Plant Characteristics ◽  
Growing Conditions ◽  
Terminal Drought Stress ◽  
Water Treatments

The aim of this study was to evaluate twenty-five common bean genotypes for terminal drought stress. Simple lattice designs were used with two replications under stress and non-stress growing conditions on the field. The experiment was performed using irrigation water during the dry season (December-March). Up to flowering, the stress plots were irrigated and the non-stress plots were provided with water up to physiological maturity. Under both stress and non-stress conditions, several plant characteristics related to yield were assessed. The generated data in this study was subject to analysis of variance (ANOVA) using SAS software version 9.0.0. Data from non-stress (NS) and drought stress (DS) treatments were compared to assess the effect of drought stress or water regime on yield-related traits. In order to perform a combined analysis of variance, the datasets from the two treatments were combined (ANOVA). In this experiment, all the genotypes used showed significant differences in yield and some of the components of yield. For all the characteristics measured, except for flowering days, there were substantial variations between the two water treatments. There was no significant correlation between genotypes and water treatments for almost all the traits tested, with the exception of days to flowering, harvest index and root pulling resistance. Genotypes such as SER 125, MALB-67, MALB-65, MALB-51 and MALB-3 performed better under the two water treatments on the basis of mean productivity (MP) and geometric mean (GM). Understanding the relationships between plant characteristics related to drought stress tolerance and their genetic variability for stress-related grain yield, especially terminal water stress conditions, should prompt common bean breeders to take better measurements of yield and more comprehensive features of drought response.

scholarly journals Evidence for genotypic differences among elite lines of common bean in the ability to remobilize photosynthate to increase yield under drought

2016 ◽  
Vol 155 (6) ◽  
pp. 857-875 ◽  
Author(s):  
I. M. RAO ◽  
S. E. BEEBE ◽  
J. POLANIA ◽  
M. GRAJALES ◽  
C. CAJIAO ◽  
...  
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Common Bean ◽  
Harvest Index ◽  
Genotypic Differences ◽  
Area Index ◽  
Wild Bean ◽  
Terminal Drought ◽  
Terminal Drought Stress ◽  
Pod Harvest Index

SUMMARYCommon bean (Phaseolus vulgaris L.) is the most important food legume for human consumption. Drought stress is the major abiotic stress limitation of bean yields in smallholder farming systems worldwide. The current work aimed to determine the role of enhanced photosynthate mobilization to improve adaptation to intermittent and terminal drought stress and to identify a few key adaptive traits that can be used for developing drought-resistant genotypes. Field studies were conducted over three seasons at Centro Internacional de Agricultura Tropical, Palmira, Colombia to determine genotypic differences in adaptation to intermittent (two seasons) and terminal (one season) drought stress compared with irrigated conditions. A set of 36 genotypes, including 33 common bean, two wild bean and one cowpea were evaluated using a 6 × 6 lattice design under irrigated and rainfed field conditions. Three common bean elite lines (NCB 226, SEN 56, SER 125) were identified with superior levels of adaptation to both intermittent and terminal drought stress conditions. The greater performance of these lines under drought stress was associated with their ability to remobilize photosynthate to increase grain yield based on higher values of harvest index, pod harvest index, leaf area index and canopy biomass. Two wild bean germplasm accessions (G 19902, G 24390) showed very poor adaptation to both types of drought stress. One small-seeded black line (NCB 226) was superior in combining greater values of canopy biomass with greater ability to mobilize photosynthates to grain under both types of drought stress. Two small-seeded red lines (SER 78, SER 125) seem to combine the desirable traits of enhanced mobilization of photosynthates to seed with effective use of water through canopy cooling under terminal drought stress. Pod harvest index showed significant positive association with grain yield under both types of drought stress and this trait can be used by breeders as an additional selection method to grain yield in evaluation of breeding populations for both types of drought stress.

scholarly journals ABA biosynthesis and degradation contributing to ABA homeostasis during barley seed development under control and terminal drought-stress conditions

2011 ◽  
Vol 62 (8) ◽  
pp. 2615-2632 ◽  
Author(s):  
Christiane Seiler ◽  
Vokkaliga Thammegowda Harshavardhan ◽  
Kalladan Rajesh ◽  
Palakolanu Sudhakar Reddy ◽  
Marc Strickert ◽  
...  
Keyword(s):  
Drought Stress ◽  
Seed Development ◽  
Stress Conditions ◽  
Barley Seed ◽  
Terminal Drought ◽  
Terminal Drought Stress ◽  
Aba Biosynthesis

scholarly journals Evaluating the Relationship between Distributions of Photosynthetic Assimilates Related Traits and Grain Yield in Wheat Genotypes under Terminal Drought Stress Conditions

2018 ◽  
Vol 9 (24) ◽  
pp. 10-21
Author(s):  
Seyed Javad Talebzadeh1 ◽  
Hashem Hadi ◽  
Reza Amirnia ◽  
Mehdi Tajbakhsh ◽  
Mohammad Rezaei Morad Ali ◽  
...  
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Stress Conditions ◽  
Wheat Genotypes ◽  
Terminal Drought ◽  
Terminal Drought Stress ◽  
The Relationship

A QTL hot spot region on chromosome 1B for nine important traits under terminal drought stress conditions in wheat

2020 ◽  
Vol 48 (1) ◽  
pp. 17-24 ◽  
Author(s):  
M. Zandipour ◽  
E. Majidi Hervan ◽  
A. Azadi ◽  
M. Khosroshahli ◽  
A. Etminan
Keyword(s):  
Drought Stress ◽  
Hot Spot ◽  
Stress Conditions ◽  
Terminal Drought ◽  
Terminal Drought Stress

scholarly journals Caracterización fenotípica por resistencia a sequía terminal de germoplasma de frijol común

2018 ◽  
Vol 29 (1) ◽  
pp. 1 ◽  
Author(s):  
Néstor Felipe Chaves-Barrantes ◽  
José A. Polanía ◽  
Carlos Germán Muñoz-Perea ◽  
Idupulapati M. Rao ◽  
Stephen E. Beebe
Keyword(s):  
Grain Yield ◽  
Common Bean ◽  
Geometric Mean ◽  
Field Trials ◽  
Drought Condition ◽  
Negative Effects ◽  
Lattice Design ◽  
Terminal Drought ◽  
Resistant Lines ◽  
Terminal Drought Stress

Terminal drought is a worldwide constraint to common bean production and its negative effects will be increased by climate change. The objective of this research was to characterize phenotypically advanced lines and commercial cultivars of common bean for their resistance to terminal drought stress. Field trials were conducted during 2012 and 2013 at Centro Internacional de Agricultura Tropical (CIAT), Palmira, Colombia. A 4x4 partially balanced lattice design with four replicates was used and, evaluated under irrigation and terminal drought. To achieve the terminal drought condition, irrigation was suspended at 22-23 days after planting. Terminal drought reduced mean grain yield by 68%. Lines SEN 56, BFS 29, NCB 226 and SER 16 showed high grain yield in both irrigated (3617-3836 kg/ ha) and terminal drought (1232-1447 kg/ha) conditions, while RCB 593 and G 40001 showed high grain yield in drought (>1270 kg/ha) and similar to checks in irrigated condition. The most resistant lines showed lower drought susceptibility index (0,88 - 1,00), earlier maturity (56 - 60 dds), superior geometric mean (1931 - 2311 kg/ha), and higher number of grains/m2, (673 - 1250). Drought resistant lines produced at least 15% and 50% more grain yield than EAP 9510-77, commercial check for Central America, in irrigated and drought condition, respectively. In addition, they were also superior to other commercial checks such as DOR 390 and Bribri.

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