Stability in Performance of Normal and Nutritionally Enhanced Highland Maize Hybrid Genotypes in Eastern Africa

Kassa, Yehuala; Asea, Godfrey; Demissew, Assalif; Ligeyo, Dickson; Demewoz, N.; Saina, Ernest; Serumaga, J.; Twumasi-Afriyie, S.; Opio, F.; Rwomushana, Ivan; Gelase, N.; Gudeta, N.; Wondimu, F.; Solomon, Alexander; Zelleke, Habtamu; Andualem, W. B.A.; Habte, J; Mduruma, Z.

doi:10.3923/ajps.2013.51.60

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…Earlier studies have suggested that by considering GE, superior genotypes were selected for commercial release to farmers in Africa (Pixley and Bjarnason 2002;Beyene et al 2011). Genotype 9 environment interactions have been investigated through the use of statistical tools such as the additive main effects and multiplicative interaction (AMMI) analysis for grain yield and grain micronutrients' concentrations and stability (Zobel et al 1988;Gauch 2006;Kassa et al 2013); and genotype main effect plus genotype 9 environment interaction (GGE) for the analyses of grain yield and stability in tropical maize (Yan et al 2000;Makumbi et al 2015). These analytical methods provide an insight into the extent of GE present in a given study.…”

Section: Introductionmentioning

confidence: 99%

Genotype by environment interactions and agronomic performance of doubled haploids testcross maize (Zea mays L.) hybrids

et al. 2015

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In vivo production of maternal haploid plants and advancement in chromosome doubling technology has led to rapid production of doubled haploid homozygous lines. These in turn have boosted rapid advancement in most breeding programs. This has resulted in production of a large number of maize hybrids which need testing across production environments to select the most suitable hybrids for release and cultivation. The objective of this study was to assess the genotype 9 environment interactions (GE) for grain yield and other agronomic traits and evaluate the performance of 44 recently developed doubled haploids (DH) testcross hybrids along with six checks across five locations in Uganda. Significant mean squares for environment (E), genotype (G) and GE were observed for all studied traits. Environment explained 46.5 % of the total variance, while G and GE contributed 13.2 and 7.2 %, respectively. Genetic correlations among locations were high (0.999), suggesting little GE among environments. The 10 best testcross hybrids had a 49.2 % average grain yield advantage over the six checks at all locations. DH hybrids CKHDHH0887, CKDHH0878, CKDHH 0859, WM1210, CKDHH0858, and WM1214 were the most stable, across locations. The DH testcross hybrids produced higher grain yield and possessed acceptable agronomic traits compared to the commercial hybrids developed earlier. Use of the best DH testcross hybrids, well targeted to the production environments, could boost maize production among farmers.

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Section: Introductionmentioning

confidence: 99%

Genotype by environment interactions and agronomic performance of doubled haploids testcross maize (Zea mays L.) hybrids

et al. 2015

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“…В стратегии адаптивной интенсификации растениеводства агроэкологическое районирование территории занимает центральное место [1]. В этой связи сложной и важной практической задачей при агро-экологическом районировании является оптимизация сортового состава наиболее урожайных культур в соответствии с зональной структурой посевных площадей [2][3][4]. Зависимость хозяйственно ценных параме- УСПЕХИ СОВРЕМЕННОГО ЕСТЕСТВОЗНАНИЯ № 4, 2020   СЕЛЬСКОХОЗЯЙСТВЕННЫЕ НАУКИ (06.01.00, 06.03.00)  тров кукурузы от продолжительности вегетационного периода, выраженной через число ФАО, определяет отбор адаптированных гибридов [5].…”

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Ecological Variety Results of the New Mid-Medium Corn Hybrides (Fao 250–299) in the Lower Volga Region

Volkov¹,

Жужукин²,

Zaytsev³

et al. 2020

УСЕ (ACNR)

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В статье рассматриваются результаты экологического испытания гибридов кукурузы (ФАО 250-299), созданных в разных селекцентрах России. Объем питомника экологического испытания гибридов варьировал в интервале 20-39 наименований. В целом несущественное значение коэффициентов асимметрии (исключение 2010 г.) и эксцесса (исключение 2009 г.) характеризует выборку гибридов как соответствующую нормальному распределению. Важной особенностью довольно длительного изучения гибридов в пункте испытания ФГБНУ РосНИИСК «Россорго» является значительное варьирование гидротермического коэффициента (0,32-1,1). Диапазоны варьирования и коэффициенты вариации урожайности зерна указывают на разнообразие гибридов и их реакцию на условия среды. Урожайность наиболее продуктивных экспериментальных гибридов кукурузы варьировала в следующих пределах:

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Using cross‐country datasets for association mapping in Arachis hypogaea L.

Okaron,

Mwololo,

Gimode

et al. 2024

The Plant Genome

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Groundnut (Arachis hypogaea L.) is one of the most important climate‐resilient oil crops in sub‐Saharan Africa. There is a significant yield gap for groundnut in Africa because of poor soil fertility, low agricultural inputs, biotic and abiotic stresses. Cross‐country evaluations of promising breeding lines can facilitate the varietal development process. The objective of our study was to characterize popular test environments in Uganda (Serere and Nakabango) and Malawi (Chitala and Chitedze) and identify genotypes with stable superior yields for potential future release. Phenotypic data were generated for 192 breeding lines for yield‐related traits, while genotypic data were generated using skim‐sequencing. We observed significant variation (p < 0.001; p < 0.01; p < 0.05) across genotypes for all yield‐related traits: days to flowering (DTF), pod yield (PY), shelling percentage, 100‐seed weight, and grain yield within and across locations. Nakabango, Chitedze, and Serere were clustered as one mega‐environment with the top five most stable genotypes being ICGV‐SM 01709, ICGV‐SM 15575, ICGV‐SM 90704, ICGV‐SM 15576, and ICGV‐SM 03710, all Virginia types. Population structure analysis clustered the genotypes in three distinct groups based on market classes. Eight and four marker‐trait associations (MTAs) were recorded for DTF and PY, respectively. One of the MTAs for DTF was co‐localized within an uncharacterized protein on chromosome 13, while another one (TRv2Chr.11_3476885) was consistent across the two countries. Future studies will need to further characterize the candidate genes as well as confirm the stability of superior genotypes across seasons before recommending them for release.

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Stability in Performance of Normal and Nutritionally Enhanced Highland Maize Hybrid Genotypes in Eastern Africa

Cited by 7 publications

References 4 publications

Genotype by environment interactions and agronomic performance of doubled haploids testcross maize (Zea mays L.) hybrids

Genotype by environment interactions and agronomic performance of doubled haploids testcross maize (Zea mays L.) hybrids

Ecological Variety Results of the New Mid-Medium Corn Hybrides (Fao 250–299) in the Lower Volga Region

Using cross‐country datasets for association mapping in Arachis hypogaea L.

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