scholarly journals Trait Based Adaptation and Yield Stability Parameters in Little Millet (Panicum sumatrense Roth. ex. Roem. and Schultz.)

2021 ◽  
pp. 210-221
Author(s):  
V. Manimozhi Selvi ◽  
A. Nirmalakumari
Keyword(s):  
Grain Yield ◽  
Regression Coefficient ◽  
Optimum Conditions ◽  
Stability Parameters ◽  
Ecological Zones ◽  
Little Millet ◽  
Favourable Environment ◽  
The Stability ◽  
The Given ◽  
Agro Ecological Zones

Twelve accessions of littlemillet genotypes which included 10 germplasm accessions and two released check varieties were studied over five environments of rainy seasons of 2013 for their grain yield and stability. The results have shown that genotypes TNPsu 141 and TNPsu 28 had possessed around unit regression coefficient (b = 1.24 to 0.82), thus displaying average stability and are adaptable to all the above five different agro-ecological zones.  Also, these genotypes had non- significant S2di values enabling it to predict the stability. Genotypes TNPsu 17, PM 29, TNPsu 18, and IPmr 886 manifested significantly higher single plant grain yield than the standard check varieties along with regression coefficient values of greater than one expressing above-average stability. These can be performed better in a favourable environment. However, they were classified as unstable due to their significant S2 di values revealing that the performance of the genotypes was unpredictable for the given environment. These genotypes were performed better under optimum conditions. Out of 12 genotypes MS 1826 and MS 4684 had an average response and appeared unpredictable stability. However, among the genotypes studied, TNPsu 141 possessed low yield and perform better in sub -optimum environments which are inferred by less than unit regression.

scholarly journals Repeatability of adaptability and stability parameters of common bean in unpredictable environments

2013 ◽  
Vol 48 (9) ◽  
pp. 1254-1259 ◽  
Author(s):  
Lidiane Kely de Lima ◽  
Magno Antonio Patto Ramalho ◽  
Ricardo Augusto Diniz Cabral Ferreira ◽  
Ângela de Fátima Barbosa Abreu
Keyword(s):  
Grain Yield ◽  
Common Bean ◽  
Regression Coefficient ◽  
Coefficient Of Determination ◽  
Yield Data ◽  
Stability Parameters ◽  
Small Magnitude ◽  
Unpredictable Environments ◽  
Minas Gerais State ◽  
Sowing Season

The objective of this work was to estimate the repeatability of adaptability and stability parameters of common bean between years, within each biennium from 2003 to 2012, in Minas Gerais state, Brazil. Grain yield data from trials of value for cultivation and use common bean were analyzed. Grain yield, ecovalence, regression coefficient, and coefficient of determination were estimated considering location and sowing season per year, within each biennium. Subsequently, a analysis of variance these estimates was carried out, and repeatability was estimated in the biennia. Repeatability estimate for grain yield in most of the biennia was relatively high, but for ecovalence and regression coefficient it was null or of small magnitude, which indicates that confidence on identification of common bean lines for recommendation is greater when using means of yield, instead of stability parameters.

scholarly journals Modelling maize grain yield and nitrate leaching from sludge-amended soils across agro-ecological zones: A case study from South Africa

Water SA ◽  
2019 ◽  
Vol 45 (4 October) ◽  
Author(s):  
ZM Ogbazghi ◽  
EH Tesfamariam ◽  
JG Annandale
Keyword(s):  
South Africa ◽  
Grain Yield ◽  
Nitrate Leaching ◽  
Inorganic Fertilizer ◽  
Amended Soils ◽  
Ecological Zones ◽  
Maize Grain Yield ◽  
Maize Grain ◽  
Sludge Application ◽  
Agro Ecological Zones

When applying municipal sludge according to crop N requirements, the primary aim should be optimizing sludge application rates in order to maximize crop yield and minimize environmental impacts through nitrate leaching. Nitrate leaching and subsequent groundwater contamination is potentially one of the most important factors limiting the long-term viability of sludge application to agricultural soils. This study assessed maize grain yield and potential nitrate leaching from sludge-amended soils, using the SWB-Sci model, based on crop nitrogen requirements and inorganic fertilizer. The following hypotheses were tested using the SWB­-Sci model and 20 years of measured weather data for 4 of the 6 South African agro-ecological zones. Under dryland maize cropping, grain yield and nitrate leaching from sludge-amended soils compared to inorganic fertilizer: (1) will remain the same across agro-ecological zones and sites, (2) will not vary across seasons at a specific site, and (3) will not vary across soil textures. Model simulations showed that annual maize grain yield and nitrate leaching varied significantly (P > 0.05) across the four agro-ecological zones, both for sludge-amended and inorganic fertilizer amended soils. The annual maize grain yield and nitrate leaching from sludge-amended soils were 12.6 t∙ha-1 and 32.7 kgNO3-N∙ha−1 compared to 10.2 t∙ha-1 and 43.2 kgNO3-N∙ha−1 for inorganic fertilizer in the super-humid zone. Similarly, maize grain yield and nitrate leaching varied significantly across seasons and soil textures for both sludge and inorganic fertilizer amended soils. However, nitrate losses were lower from sludge-amended soils (2.3–8.2%) compared to inorganic fertilizer (11.1–26.7%) across all zones in South Africa. Therefore, sludge applied according to crop N requirements has a lower environmental impact from nitrate leaching than commercial inorganic fertilizer. Further validation of these findings is recommended, using field studies, and monitoring potential P accumulation for soils that received sludge according to crop N requirements.

scholarly journals Yield Stability Analysis of Maize (Zea mays L.) Hybrids Using Parametric and AMMI Methods

Scientifica ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Seyed Habib Shojaei ◽  
Khodadad Mostafavi ◽  
Ali Omrani ◽  
Saeed Omrani ◽  
Seyed Mohammad Nasir Mousavi ◽  
...  
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Zea Mays L ◽  
Block Design ◽  
High Yield ◽  
Stability Parameters ◽  
Maize Hybrids ◽  
Randomized Complete Block Design ◽  
Ammi Analysis ◽  
The Stability

The present study investigated the stability and adaptability of maize (Zea mays L.) hybrids. In this study, 12 maize hybrids were planted and examined considering the grain yield. The experiment was arranged in a randomized complete block design (RCBD) with three replications in four research stations in Iran during two crop years. The combined analysis of variance showed that genotype-environment interactions were significant at one percent probability level. The grain yield can stabilize, and hybrids with specific adaptability are recommended to each environment. Hybrids with specific adaptability can be recommended to all types of the environment. Means comparison yield of the genotypes identified DC370 as a high-yield genotype. Regarding AMMI analysis, genotype × environment interactions (GEIs) and two first components were found significant. The SC647 genotype was identified as the most stable genotype. Regarding the stability parameters, SC647 and KSC705 genotypes were selected as the most stable genotypes. From AMMI1 and AMMI2 graphs, the SC647 genotype was identified as the most stable genotype compared with other hybrids.

scholarly journals GENOTYPE BY ENVIRONMENT AND STABILITY ANALYSES OF DRYLAND MAIZE HYBRIDS

2020 ◽  
Author(s):  
Achmad Amzeri ◽  
◽  
B.S. DARYONO ◽  
M. SYAFII ◽  
◽  
...  
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Yield Potential ◽  
High Yield ◽  
Environment Interaction ◽  
Phenotypic Analysis ◽  
Stability Parameters ◽  
Early Maturity ◽  
Maize Hybrids ◽  
The Stability

The phenotypic analysis of new candidate varieties at multiple locations could provide information on the stability of their genotypes. We evaluated the stability of 11 maize hybrid candidates in five districts in East Java Province, Indonesia. Maize hybrids with high yield potential and early maturity traits derived from a diallel cross were planted in a randomized complete block design with two checks (Srikandi Kuning and BISI-2) as a single factor with four replicates. The observed traits were grain yield per hectare and harvest age. The effects of environment, genotype, and genotype × environment interaction on yield were highly significant (P < 0.01). KTM-1, KTM-2, KTM-4, KTM-5, and KTM-6 showed higher average grain yield per hectare than the checks (Srikandi Kuning = 8.49 ton ha−1 and BISI-2 = 7.32 ton ha−1) at five different locations. The average harvest age of 11 candidates was less than 100 days. KTM-4 and KTM-5 had production yields that were higher than the average yield of all genotypes in all environments (Yi > 7.78 tons ha−1) and were considered stable on the basis of three stability parameters, i.e., Finlay–Wilkinson, Eberhart–Russell, and additive main effect multiplicative interaction (AMMI). KTM-2 had the highest yield among all tested genotypes (9.33 ton ha−1) and was considered as stable on the basis of AMMI but not on the basis of Finlay–Wilkinson and Eberhart–Russell. KTM-1 performed well only in Pamekasan, whereas KTM-6 performed well only in Sampang. Thus, these two genotypes could be targeted for these specific locations.

YIELD STABILITY OF DOUBLE HAPLOID LINES OF BARLEY

1978 ◽  
Vol 58 (4) ◽  
pp. 929-933 ◽  
Author(s):  
E. REINBERGS ◽  
L. S. P. SONG ◽  
T. M. CHOO ◽  
K. J. KASHA
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Doubled Haploid ◽  
Regression Coefficient ◽  
Regression Method ◽  
Linear Regression Method ◽  
Breeding Methods ◽  
Doubled Haploid Lines ◽  
The Mean ◽  
The Stability

The effect of complete homozygosity and homogeneity on stability of grain yield in barley was studied in 38 doubled haploid lines derived from F1 plants of six biparental crosses. The number of doubled haploid lines in each cross ranged from 3 to 12. These along with 13 check cultivars were evaluated at five locations in Ontario in 1975 and 1976. The linear regression method proposed by Eberhart and Russell in 1966 was used to analyze the stability of grain yield. In general, the response of doubled haploid lines to different environments, based upon the regression coefficient, did not differ from the response of the check cultivars. Similar responses were also observed among check cultivars, among crosses, and among doubled haploid lines within crosses. Furthermore, the pooled deviation from regression mean squares for the check cultivars was not different from that for the doubled haploid lines. The mean yield of the doubled haploid lines was as high as that of the check cultivars. Significant differences in mean yield among crosses was not detectable but considerable genetic variability in grain yield was found among lines within three of the crosses. It appears that under Ontario conditions homogeneous and homozygous lines derived by the doubled haploid method are as good agronomically and have yields as stable as the licensed cultivars developed by conventional breeding methods.

scholarly journals Probing of the genetic components of seedling emergence traits as selection indices, and correlation with grain yield characteristics of some tropical maize varieties

2021 ◽  
Vol 6 (1) ◽  
pp. 223-229
Author(s):  
Sunday Ayodele Ige ◽  
Omolaran Bello ◽  
Aremu Charity ◽  
Abolusoro Stephen
Keyword(s):  
Grain Yield ◽  
Seedling Emergence ◽  
Selection Procedure ◽  
Kernel Weight ◽  
Ecological Zones ◽  
Genetic Components ◽  
Maize Varieties ◽  
Maturity Period ◽  
Emergence Percentage ◽  
The Stability

Abstract Ten maize varieties of tropical origin were tested at two different agro-ecological zones during the cropping season of 2007 and 2008 to investigate the genetic components of seedling emergence characteristic and correlate with grain yield and related traits in Nigeria. Heritability values were high for all traits study, indicating reliability and stability of most of the traits across different environments. Variety DMRLSR-Y had highest 300 kernel weight (105.2 g), but least grain yield and second to the least emergence percentage, indicating bigger kernel and highest kernel weight/cob but low plant stands resulted in low grain yield. Genotypic and agronomic correlation analysis revealed positive associations (p < 0.01) between grain yield and emergence percentage (E%), and 300 kernel weight; however, interval between pollen shed and silking was negatively correlated with physiological maturity period and 300 kernel weight. Improvement of this variety for higher emergence percentage is therefore predicted for higher grain yield. High values of genotypic and phenotypic coefficient of variation recorded by emergence percentage (41 and 45%) and grain yield (25 and 32%), respectively, revealed the less effects of environmental factors on the aforementioned characters, and it showed the stability and reliability of the two traits. High values of both broad sense heritability and genetic advance recorded by emergence percentage (E%) and 300 kernel weight confirmed that standard selection procedure could be used to identify superior genotypes for the two traits.

scholarly journals YIELD PERFORMANCE AND ADAPTATION OF DESI CHICK PEA VARIETIES IN SELECTED DISTRICTS OF WOLAYTA AND HADIYA ZONES OF SOUTH ETHIOPIA

2016 ◽  
Vol 4 (3) ◽  
pp. 33-41
Author(s):  
Yasin Goa ◽  
Mathewos Ashamo
Keyword(s):  
Grain Yield ◽  
Seed Weight ◽  
Block Design ◽  
Chick Pea ◽  
Ecological Zones ◽  
South Ethiopia ◽  
Randomized Complete Block Design ◽  
Days To Maturity ◽  
On Farm ◽  
Agro Ecological Zones

The experiments were conducted on station and on farm in three districts of Wolayta and Hadiya Zones, south region, Ethiopia, to evaluate the adaptation and yield, assess farmer’s preferences of desi chick pea varieties  to this agro ecological Zones during 2004/05 Meher Season. Data on plant height, hundred seed weight, pod per plant, days to flowering, days to maturity and grain yield were recorded. Five released varieties namely worku, Akaki, Mariye, Dubie, Dz-10-11 and local checks of respective locations were planted on 4.8m2 plots at spacing of 30cm*10cm. The trials were laid in randomized complete block design with three replications. Twelve farmers from three districts at four villages’ three farmers at each village were participated in conducting on farm trials with each farmer as a replicate. There were significant differences among varieties for grain yield and some of traits.  The varieties Akaki and worku were superior yielded overall to the standard and local check across villages ’and on stations. Thus, Akaki and worku out yielded other varieties and had average yields of 1440.95 kg/ha and 1434.75kg/ha at on station and similar trends on farm. The combined statistical analysis and farmers assessments revealed Akaki and worku out yielding other varieties which were also selected by farmers and researchers as the most preferred varieties’. It is therefore recommended that worku and Akaki which had higher yields be promoted for cultivation in the selected districts of south Ethiopia.

scholarly journals Effect of environmental and genetic factors on the correlation and stability of grain yield components in wheat

Genetika ◽  
2011 ◽  
Vol 43 (1) ◽  
pp. 141-152 ◽  
Author(s):  
Nikola Hristov ◽  
Novica Mladenov ◽  
Ankica Kondic-Spika ◽  
Ana Marjanovic-Jeromela ◽  
Bojan Jockovic ◽  
...  
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
High Performance ◽  
Grain Number ◽  
Stability Parameters ◽  
Wheat Varieties ◽  
Grain Number Per Spike ◽  
Analysis Of Stability ◽  
Complex Relationships ◽  
The Stability

More effective breeding and development of new wheat genotypes depend on an intricate analysis of the complex relationships among many different traits. The objective of this paper was to determine the interrelationship, direct and indirect effects, and stability of different yield components in wheat. Forty divergent genotypes were analyzed in a three- year study (2005-2007). Highly significant correlations were found between grain yield per plant and all the other traits analyzed except spike length, with the only negative correlation being that with plant height. Path analysis revealed highly significant direct effects of grain number per spike, grain mass per spike and 1000 grain weight on grain yield per plant. Analysis of stability parameters showed that the stability of grain yield per plant depended for the most part on the stability of grain number per spike, grain mass per spike and harvest index. Cluster analysis identified genotypes with a high performance for grain yield per plant and good stability parameters, indicating the possibility of developing wheat varieties with a high potential and high stability for a particular trait.

Sign in / Sign up

Export Citation Format

Share Document