scholarly journals Assessment of Cowpea (Vigna Unguiculata(L.) Walp) Germplasm for Agronomic Traits in Seed Production

2017 ◽  
Vol 4 (1) ◽  
Keyword(s):  
Seed Production ◽  
Vigna Unguiculata ◽  
Agronomic Traits

Participatory varietal selection among elite cowpea genotypes in northern Namibia

2017 ◽  
Author(s):  
Lydia N. Horn ◽  
Habteab M. Ghebrehiwot ◽  
Fatma Sarsu ◽  
Hussein A. Shimelis
Keyword(s):  
Drought Tolerance ◽  
Gamma Irradiation ◽  
Vigna Unguiculata ◽  
Agronomic Traits ◽  
Plant Cover ◽  
Participatory Varietal Selection ◽  
Early Maturity ◽  
Local Varieties ◽  
Percent Percent ◽  
Cowpea Varieties

The objective of this study was to select cowpea (Vigna unguiculata [L.] Walp.) varieties that meet farmers’ needs in Namibia, from a set of newly developed and elite cowpea varieties developed through gamma irradiation. Thirty four candidate mutant cowpea varieties derived from three local varieties, (Shindimba, Bira and Nakare), were evaluated for nine agronomic traits. The new genotypes descended from Bira were favourably selected by all participants for their best plant cover. The genotype L1P12 (Bi450) was preferred by 81 percent percent of farmers for its higher pod setting ability. The genotype R4P5 (Nk150) with longer pod size and R3P1 (Bi600) with early maturity were ideal candidates preferred by nearly all farmers. The present study has identified farmers’ most-preferred cowpea varieties selected for their best agronomic performances and drought tolerance. These selected cowpea genotype lines will further be subjected to distinct, uniformity and stability trials for varietal registration and release.

Analysis of seed production and its association with forage production and agronomic traits in orchardgrass (Dactylis glomerata) under different moisture conditions

2017 ◽  
Vol 68 (7) ◽  
pp. 657 ◽  
Author(s):  
F. Saeidnia ◽  
M. M. Majidi ◽  
A. Mirlohi
Keyword(s):  
Water Stress ◽  
Seed Production ◽  
Seed Weight ◽  
Dry Matter ◽  
Agronomic Traits ◽  
Genotypic Variation ◽  
Dactylis Glomerata ◽  
Forage Production ◽  
Negative Effect ◽  
Stress Environments

Genetic analysis of seed production and the effect of water stress on seed and forage production have not been addressed simultaneously in orchardgrass (Dactylis glomerata L.). Thirty-six genotypes of orchardgrass were clonally propagated and evaluated in the field under two moisture environments (normal and water stress) during 3 years (2013–15). A high degree of variation was observed among genotypes for all of the measured traits. Water stress had a negative effect on seed weight per plant and dry matter biomass per plant, and it reduced genotypic variation for most of the traits. A significant and positive correlation was found between seed weight per plant and dry matter biomass per plant, which suggested that simultaneous selection for both traits is possible in normal as well as water-stress environments. The results also indicated that traits explaining seed and forage production variability were not exactly the same in water-stress and non-stress environments. Therefore, indirect selection based on seed weight and dry matter biomass components under normal and water-stress conditions may result in genotypes with different performances. In both normal and water-stress environments, some genotypes were identified as superior with respect to high seed weight and dry matter biomass per plant. These genotypes can be used for further studies to improve seed weight and dry matter biomass per plant, simultaneously.

scholarly journals EFFECT OF GRAIN MOISTURE OF CORN AT HARVESTING ON SOME AGRONOMIC TRAITS

2016 ◽  
Vol 47 (5) ◽  
Author(s):  
Baktash & Alkazaali
Keyword(s):  
Moisture Content ◽  
Grain Yield ◽  
Seed Production ◽  
Agronomic Traits ◽  
Field Crop ◽  
Spring Season ◽  
College Of Agriculture ◽  
Fall Season ◽  
Moisture Contents ◽  
Grain Moisture

This research was conducted during spring and fall seasons, 2015 , at the fields of Field Crop Department – College of Agriculture –University of Baghdad . The objective was to study the effect of grain moisture at  harvesting on some agronomic traits  of the corn  next  generation , by  using synthetic variety 5018 . In spring season 2015 , seeds of this variety  was planted ,when  moisture of the ear grains was (37-42%) , ten ears were harvested. Ear harvesting dates were performed manually when the grains had 37-42% , 34-36% , 30-33% , 25- 28% and 19-22%  moisture content. In fall season  2015 , varietal trail was carried out to the five treatment materials , using Randomized Complete Bock Design , with four replicates. The results  revealed , that non significant differences between treatments (19-22)%  and  (25-28)% , in all the studied traits . The plants  grown from the seeds of (25-28)%, were produced  highest vegetative mass (116.30 g.plant-1) , total dray matter (269 g. plant-1) and total dray matter ( 1.80  kg.m-2 ) . Highest grain yield ( 1.07  kg.m-2 ) and harvesting index ( 0.63) were produced from plants grown from  seeds harvested  with (19-22)%  moisture content . It can be concluded  that the best moisture contents of the grains for seed production was (19-28)%.

scholarly journals Adaptation of Cowpea (Vigna unguiculata (L.) Walp.) to Water Deficit during Vegetative and Reproductive Phases Using Physiological and Agronomic Characters

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Vincent Ezin ◽  
Artoche Gloria Christelle Tosse ◽  
Ifagbémi Bienvenue Chabi ◽  
Adam Ahanchede
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Water Deficit ◽  
Vigna Unguiculata ◽  
Agronomic Traits ◽  
International Institute ◽  
Relative Water ◽  
Cowpea Varieties ◽  
Reproductive Phases ◽  
Water Treatments

Cowpea (Vigna unguiculata (L.) Walp.) is an important commodity in West Africa. Its seeds are a valuable source of protein, vitamins, and income for humans. However, cowpea cultivation in Benin faces climatic constraints such as water stress caused by a prolonged absence of rain during the rainy season. Thus, this work aims at selecting cowpea varieties that can be cultivated in times of drought without compromising their yields and yield components. Twenty cowpea varieties were used, including 17 improved cultivars and 3 landraces. The experiment was conducted at the International Institute of Tropical Agriculture in Benin and laid at a split-plot design with four replicates. Each genotype was exposed to three water treatments: fully irrigated control, vegetative stress (when plants were 23 days old, drought stress was imposed for 30 days), and reproductive stress (once the first flowers were observed, water stress was imposed for 30 days). The results showed that photochemical yield, chlorophyll content, and relative water content were reduced under water deficit at the vegetative and reproductive stages. But there were no significant differences in proline content among cowpea varieties. Agronomic traits such as number of days to flowering, number of pods, yield per plant, the weight of 100 seeds, and harvest time showed significant differences under water stress. Overall, the landraces and cultivars including Kpodjiguegue, KVX 61-1, and IT 06-K-242-3 were the most tolerant to drought stress at the vegetative and reproductive stages and could potentially be used in breeding programs to improve drought tolerance of cowpeas.

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