Genotype by environment interaction and yield stability of hybrid maize varieties evaluated in three locations of mid altitudes of Rwanda

Rwasimitana, Fabrice; Claver, Ngaboyisonga; Celestin, Ukozehasi; Johansson, Eva

doi:10.31730/osf.io/48htq

Cited by 2 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Significant differences among test crosses realized for all traits showed that the test crosses were adequately different from each other for these traits and thus implying a possibility of selecting most desirable test crosses for these traits. Similar findings were previously reported [5,10,20,23].…”

Section: Gene Action and Test Crosses Variationsupporting

confidence: 93%

“…Diverse ecologies and more replications for testing would be recommended for precise results. Similar findings were reported by other researchers working on different maize genotypes [5,15,[28][29][30][31].…”

Section: Gene Action and Test Crosses Variationsupporting

confidence: 92%

“…In Rwanda, maize has become a leading crop in agricultural production and ranks first among pulse and grain crops production in Rwanda. It has seen an unprecedented development and radical changes [2,[5][6]. This increased maize production was mainly due to a shift in using only open pollinated varieties (OPVs) towards maize hybrids.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda

Nyombayire¹,

Derera²,

Sibiya³

et al. 2021

JPS

View full text Add to dashboard Cite

Maize breeding programmes exploit inbred lines with superior combining ability for grain yield and other agronomic traits to create competitive hybrids. Therefore, the objectives of this study were to determine heterotic groups of locally developed maize inbred lines, their heterotic relationships, with exotic testers as well as the gene action controlling grain yield. Nineteen maize inbred lines were crossed to four testers, based on a line x tester mating scheme resulting in 76 test crosses. These crosses were evaluated together with four checks in 10 x 8 α-lattice design across four locations in 2015B and 2016A seasons. Both additive and non-additive gene action were important for grain yield with preponderance of additive gene action. The most desirable GCA effects for grain yield were realized in inbred line 8 while the highest desirable SCA effects were displayed by the test cross 18xT1. Generally, most of the inbred lines exhibited positive heterosis with all testers. However, there was more aligning firstly towards tester T2 and then to T3. The highest heterosis was displayed by the combination of inbred line 8 with 3. Regardless of the heterotic grouping method applied, the inbred lines were discriminated into different heterotic groups; two and nine heterotic groups were identified based on standard heterosis and SCA effects; respectively. The information generated would be useful in optimizing the maize hybrid breeding programme in Rwanda and for other researchers for high yielding maize variety development.

show abstract

Section: Gene Action and Test Crosses Variationsupporting

confidence: 93%

Section: Gene Action and Test Crosses Variationsupporting

confidence: 92%

See 1 more Smart Citation

Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda

Nyombayire¹,

Derera²,

Sibiya³

et al. 2021

JPS

View full text Add to dashboard Cite

show abstract

“…The high environmental effect on grain yield (Gy), compared to the genotypic and G × e interactive effect of the total variation in grain yield, is consistent with the findings of Badu-Apraku et al (2003), Rwasimitana et al (2021) and dosho et al…”

Section: Discriminating Power and Representativeness Of The Test Envi...supporting

confidence: 89%

Performance and Yield Stability of Quality Protein Maize (Zea mays L.) Hybrids under Rainfed Condition

Bankole,

Olajide,

Olaoye

2023

Agriculture (Pol'nohospodárstvo)

View full text Add to dashboard Cite

Quality protein maize (QPM) commercialization can combat the food and nutritional insecurity that is common in some developing nations of the world. Evaluation of QPM hybrids under varying rainfed environments provide valuable evidence for the selection of the most productive genotypes for the target environment. The present study was conducted at three locations to assess the agronomic performance and the grain yield stability of 11 QPM and 2 commercial hybrids (checks) over two years. There were significant (p ≥ 0.01) differences among the environments in the expression of all measured traits while genotype as well as genotype × environment interaction also differed significantly for all the traits except for husk cover and Anthesis-silking interval. The tested QPM hybrids outperformed the local and reference checks by 17.28% and 29.47% respectively. The biplot explained 85.3% of the total variation in yield, with 65.4% attributed to principal component 1 and 19.9% to principal component 2. Three vertex hybrids, EWQH-25, EWQH-21 and Local Check, were identified as the most responsive in the environments within which they fall. Hybrid EWQH-21 produced the highest yield across all environments but was unstable. Therefore, hybrids EWQH-22, EWQH-9, and EWQH-13, with similar yield values and more stable performances were recognized as ideal across environments. Lapai 2017 (E2) proves to be both representative and discriminative, making it the ideal test environment for selecting hybrids with broad adaptability. The study concludes that EWQH-9, EWQH-13, and EWQH-22 be recommended for cultivation across the environments while EWQH-21 be recommended for the specific area of adaptation.

show abstract

Genotype by environment interaction and yield stability of hybrid maize varieties evaluated in three locations of mid altitudes of Rwanda

Cited by 2 publications

References 4 publications

Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda

Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda

Performance and Yield Stability of Quality Protein Maize (Zea mays L.) Hybrids under Rainfed Condition

Contact Info

Product

Resources

About