scholarly journals Stability and genotype by environment interaction of provitamin A carotenoid and dry matter content in cassava in Uganda

2016 ◽  
Vol 66 (3) ◽  
pp. 434-443 ◽  
Author(s):  
Williams Esuma ◽  
Robert Sezi Kawuki ◽  
Liezel Herselman ◽  
Maryke Tine Labuschagne
Keyword(s):  
Dry Matter ◽  
Genotype By Environment Interaction ◽  
Matter Content ◽  
Provitamin A ◽  
Environment Interaction ◽  
Dry Matter Content ◽  
Genotype By Environment

scholarly journals Genotype-by-environment interaction and stability of sweetpotato genotypes for root dry matter, β-carotene and fresh root yield

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Fekadu Gurmu ◽  
Shimelis Hussein ◽  
Mark Laing
Keyword(s):  
Dry Matter ◽  
Genotype By Environment Interaction ◽  
Environment Interaction ◽  
Dry Matter Content ◽  
Root Yield ◽  
Carotene Content ◽  
Lattice Design ◽  
Genotype By Environment ◽  
Β Carotene ◽  
Fresh Root

AbstractThe study was conducted to estimate the magnitude of genotype x environment interactions (G x E) and to select stable and high yielding sweetpotato genotypes for root dry matter content (RDMC), β-carotene content and fresh root yield, and to identify the most discriminating and representative test environments in Ethiopia. The study was conducted across six environments (Halaba, Kokate, Areka, Arbaminch, Hawassa and Dilla) in southern Ethiopia. Twenty four selected genotypes and one check variety (Tula) were evaluated using a 5 × 5 simple lattice design. Stability analysis was conducted using Genotype plus Genotype by Environment Interaction (GGE bi-plot). Environment, genotype and G × E interaction variances were significant (p < 0.001) for the three traits. The magnitude of environment and G x E interaction was 66.8% for fresh root yield, 44.0% for RDMC and 7.6% for β-carotene content. Three genotypes designated as G1, G6 and G20 were identified as having above average RDMC of 31.82, 32.60 and 30.06%, high β-carotene content of 12.48, 14.27 and 13.99 mg 100 g

scholarly journals Genotype and environment interaction of sweetpotato varieties

2019 ◽  
Vol 44 (3) ◽  
pp. 501-512
Author(s):  
S Sultana ◽  
HC Mohanta ◽  
Z Alam ◽  
S Naznin ◽  
S Begum
Keyword(s):  
Tuber Yield ◽  
Agricultural Research ◽  
Genotype By Environment Interaction ◽  
Yield Potential ◽  
Environment Interaction ◽  
Dry Matter Content ◽  
Genotype By Environment ◽  
Discriminating Power ◽  
Study Results ◽  
Main Effect

The article presents results of additive main effect and multiplicative interaction (AMMI) and genotype (G) main effect and genotype by environment (GE) interaction (G × GE) biplot analysis of a multi environmental trial (MET) data of 15 sweetpotato varieties released from Bangladesh Agricultural Research Institute conducted during 2015–2018. The objective of this study was to determine the effects of genotype, environment and their interaction on tuber yield and to identify stable sweetpotato genotypes over the years. The experimental layout was a randomized complete block design with three replications at Gazipur location. Combined analysis of variance (ANOVA) indicated that the main effects due to genotypes, environments and genotype by environment interaction were highly significant. The contribution of genotypes, environments and genotype by environment interaction to the total variation in tuber yield was about 60.16, 10.72 and 12.82%, respectively. The first two principal components obtained by singular value decomposition of the centred data of yield accounted for 100% of the total variability caused by G × GE. Out of these variations, PC1 and PC2 accounted for 71.5% and 28.5% of variability, respectively. The study results identified BARI Mistialu- 5, BARI Mistialu- 14 and BARI Mistialu- 15 as the closest to the “ideal” genotype in terms of yield potential and stability. Varieties ‘BARI Mistialu- 8, BARI Mistialu- 11 and BARI Mistialu- 12’ were also selected as superior genotypes. BARI Mistialu- 3 and BARI Mistialu- 13 was comparatively low yielder but was stable over the environment. Among them BARI Mistialu-12, BARI Mistialu-14 and BARI Mistialu-15 are rich in nutrient content while BARI Mistialu-8 and BARI Mistialu-11 are the best with dry matter content and organoleptic taste. Environments representing in 1st and 3rd year with comparatively short vectors had a low discriminating power and environment in 2nd year was characterized by a high discriminating power. Bangladesh J. Agril. Res. 44(3): 501-512, September 2019

Genetic variation amongst swede varieties and their hybrids and their response to soil fertility

1976 ◽  
Vol 87 (2) ◽  
pp. 443-446 ◽  
Author(s):  
O. A. Denton ◽  
W. J. Whittington
Keyword(s):  
Dry Matter ◽  
Total Yield ◽  
Gene Interaction ◽  
Matter Content ◽  
Root Weight ◽  
Environment Interaction ◽  
Dry Matter Content ◽  
Fresh Weight ◽  
Partial Dominance ◽  
Shoot Weight

SummaryThe mean total yield and mean fresh weight of seven swede varieties and their F1 hybrids was increased primarily by nitrogen and also by phosphorus fertilizer. There was no evidence of genotype × environment interaction for characters concerned with yield except for dry-matter content where two varieties, Best-of-All and Reform, were less stable to fertility environments than the others. Heterosis was common amongst F1 hybrids and this suggests their use in swede improvement: the inheritance pattern of root weight showed overdominance, shoot weight showed partial dominance and drymatter content showed additivity, with no evidence of gene interaction. Segregation for root fresh weight and dry-matter content occurred in F2 populations and although an overall negative correlation was found there was evidence that progeny from certain crosses gave reasonable prospects of combining both characters.

scholarly journals Genotype by environment interaction for quality traits in chilli pepper (Capsicum annuum L.)

Genetika ◽  
2021 ◽  
Vol 53 (1) ◽  
pp. 23-49
Author(s):  
Tejpal Sran ◽  
S.K. Jindal ◽  
Neena Chawla
Keyword(s):  
Genotype By Environment Interaction ◽  
Matter Content ◽  
Environment Interaction ◽  
Dry Matter Content ◽  
Quality Traits ◽  
Chilli Pepper ◽  
Environmental Evaluation ◽  
Growing Conditions ◽  
Coloring Matter ◽  
S Model

There is a need for identifying the specific environments for the selection of adapted and stable genotypes for quality traits in chilli pepper. Among these quality traits, pungency and coloring matter are the most important ones, which need to be in stable amounts in final products. Hence, this multi-environmental evaluation of chilli pepper genotypes was done in three distinct environments, to identify the suitable environments for selection and also suitable genotypes for specific quality traits. The study includes 43 chilli genotypes tested for three distinct growing conditions for nine different quality traits at Punjab Agricultural University and data was analyzed using Eberhart & Russell?s model and GGE Biplot analysis. The environmental effect accounts for more than 35% variation for the capsaicin in oleoresin and dry matter content. While the traits namely capsaicin content in red powder (3%) and capsaicin in green chili (4.73%) were least influenced by the environment. The contribution of G?E interactions was ? 25% for all the studied traits except ascorbic acid. The genotype AC 101 was best for capsaicin content in green and red chilli powder across the environments. The data generated from this study help to identify the stable and superior genotypes for quality traits in early, main and late-season planting.

scholarly journals Performance, Variance Components, and Acceptability of Pro-vitamin A-Biofortified Sweetpotato in Southern Africa and Implications in Future Breeding

2021 ◽  
Vol 12 ◽  
Author(s):  
Edmore Gasura ◽  
Francisca Matsaure ◽  
Peter Sekwena Setimela ◽  
Joyful Tatenda Rugare ◽  
Cacious Stanford Nyakurwa ◽  
...  
Keyword(s):  
Vitamin A ◽  
Dry Matter ◽  
Tuber Yield ◽  
Vitamin A Deficiency ◽  
Matter Content ◽  
Sub Saharan Africa ◽  
Environment Interaction ◽  
Dry Matter Content ◽  
Marketable Yield ◽  
Lattice Design

In sub-Saharan Africa (SSA), vitamin A deficiency (VAD) is a major cause of blindness in children under 5 years. Sweetpotato (Ipomea batatas L.) is widely grown in this region, and pro-vitamin A varieties could help to combat such problems. Fourteen newly introduced orange-fleshed sweetpotato (OFSP) varieties from the International Potato Centre (CIP) and two local checks were evaluated at four environments using a 4 × 4 triple-lattice design for total tuber yield, marketable yield, unmarketable yield, total tuber numbers, marketable tuber numbers, unmarketable tuber numbers, dry matter content, and sensory characteristics on boiled sweetpotato. Since varieties were previously tested intensively by CIP under diverse conditions, the focus of the current study was to determine their acceptability by farmers. Across-environment ANOVA showed highly significant differences (P &lt; 0.001) for environments, genotypes, and genotype × environment interaction (GE) for all traits studied. Variety Cecelia outperformed the rest in three environments. Cecelia, Erica, Ininda, and Lourdes were found to be the top four most stable and high-yielding varieties. Genetic gains of the top four varieties over the preferred local check Mai Chenje ranged from 135 to 184%, and across-environment broad-sense heritability was 60% for tuber yield. Furthermore, farmers accepted the dry matter content (which was &gt;25%) and taste of all the introduced OFSP varieties. Since there was a high acceptability by farmers, introductions from CIP could help improve human nutrition. Despite the appropriate design, the error variance component was the highest for all traits, and proper field plot techniques were proposed in future breeding and testing activities.

Sensitivity of genotypes to feeding systems for production, weight and feed intake in dairy cattle

2000 ◽  
Vol 2000 ◽  
pp. 112-112 ◽  
Author(s):  
J.E. Pryce ◽  
R.F. Veerkamp
Keyword(s):  
Dry Matter ◽  
Genetic Parameter ◽  
Genetic Correlations ◽  
Genotype By Environment Interaction ◽  
Parameter Estimates ◽  
Environment Interaction ◽  
Combine Data ◽  
Genotype By Environment ◽  
University Of Edinburgh ◽  
Feeding Systems

Getting reliable genetic parameter estimates for dry matter intake is difficult because recording it is expensive, hence it is tempting to combine data from research herds. However, there are large differences in feeding and management systems, which causes differences in means across herds. Furthermore, variances or heritabilities may differ and genetic correlations may be less than one between herds. This is one of the reasons why it is important to investigate effects of genotype by environment interaction (GxE). Another reason is that it is important to understand how high genetic merit cows perform in different feeding systems. The objective of this study was to estimate the effect of GxE for three feeding systems at two research herds belonging to ID-Lelystad (ID) and to SAC/University of Edinburgh (Langhill).

scholarly journals Diallel analysis of provitamin A carotenoid and dry matter content in cassava (Manihot esculenta Crantz)

2016 ◽  
Vol 66 (4) ◽  
pp. 627-635 ◽  
Author(s):  
Williams Esuma ◽  
Robert S. Kawuki ◽  
Liezel Herselman ◽  
Maryke Tine Labuschagne
Keyword(s):  
Manihot Esculenta ◽  
Dry Matter ◽  
Diallel Analysis ◽  
Matter Content ◽  
Provitamin A ◽  
Dry Matter Content

scholarly journals Combining Ability and Genetic Components of Yield Characteristics, Dry Matter Content, and Total Carotenoids in Provitamin A Cassava F1 Cross-Progeny

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1850
Author(s):  
Elizabeth Parkes ◽  
Olufemi Aina ◽  
Akuwa Kingsley ◽  
Peter Iluebbey ◽  
Moshood Bakare ◽  
...  
Keyword(s):  
Combining Ability ◽  
Dry Matter ◽  
Matter Content ◽  
Provitamin A ◽  
Carotenoid Content ◽  
Dry Matter Content ◽  
Root Yield ◽  
Total Carotenoids ◽  
Genetic Components ◽  
Fresh Root

Cassava is an important root crop in sub-Saharan Africa, largely cultivated for its starchy edible roots. Biofortified cassava varieties with enhanced provitamin A carotenoid content (PVAC) developed through conventional breeding provide a solution for vitamin A deficiency among vulnerable communities. The aim of this study was to use diallel analysis of six provitamin A cassava genotypes to determine the combining ability, genetic components, heritability, and heterosis of the most important yield characteristics and total carotenoids. Genetic variability for measured characteristics were evident. Fresh root yield was mainly determined by non-additive genetic effects, while dry matter content and total carotenoids were determined by additive effects. Total carotenoids were negatively correlated with fresh root yield, indicating that selection for higher provitamin A content could reduce yield. Mid and higher parent heterosis was seen in some of the crosses for fresh root yield, dry matter content, and total carotenoids. Narrow sense heritability was moderate for fresh root yield and dry matter content, and was high for total carotenoids. This study indicated that yield and dry matter content can be improved in provitamin A cassava but that increased provitamin A content may carry a yield penalty.

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