Genetic Gains in Grain Yield of a Maize Population Improved through Marker Assisted Recurrent Selection under Stress and Non-stress Conditions in West Africa

Abdulmalik, R. O.; Menkir, Abebe; Meseka, Silvestro; Unachukwu, Nnanna; Ado, S. G.; Olarewaju, Joseph D.; Daniel, A.; Hearne, Sarah; Crossa, José; Gedil, Melaku

doi:10.3389/fpls.2017.00841

Cited by 34 publications

(27 citation statements)

References 48 publications

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“…Very recently, the genetic diversity of tropical maize inbred lines combining resistance to S. hermonthica with drought tolerance was exhibited using SNP markers [43]. The effectiveness of marker-assisted recurrent selection to improve S. hermonthica resistance together with drought tolerance in maize breeding was demonstrated [44]. Hairy roots of transgenic 'composite' maize resulting from Agrobacterium rhizogenes transformation were shown to be infected by S. hermonthica, and this rapid, high throughput transformation technique will advance our understanding of gene function in parasitic plantmaize interactions [45].…”

Section: Maizementioning

confidence: 99%

Recent research progress in combatting root parasitic weeds

Samejima

Sugimoto

2018

Biotechnology & Biotechnological Equipment

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The obligate root parasitic Orobanchaceae plants Striga, Orobanche and Phelipanche spp. parasitize economically important crops, vegetables and oil plants. They are the most devastating agricultural weed pests worldwide. Based on an analysis of the climatic requirements of these parasites, very large areas of new territory are at risk of invasion if care is not taken. Recent research in combatting root parasitic weeds was reviewed based on scientific papers reported from 2010 and onwards. The countermeasures fell into eight kinds: resistant varieties, tolerant varieties, microbiological approach, cultural practices, chemical controls, host-induced gene silencing, integrated management and dissemination of technologies including the current situation survey. The development of practical, feasible and economical control technologies against root parasitic weeds would be expected by advancing and combining the countermeasures.

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Section: Maizementioning

confidence: 99%

Recent research progress in combatting root parasitic weeds

Samejima

Sugimoto

2018

Biotechnology & Biotechnological Equipment

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“…Marker-assisted recurrent selection (MARS) is a breeding procedure that accumulates favorable alleles using molecular markers linked to target traits [21]. The utility of MARS in the improvement of grain yield, drought tolerance and resistance to Striga hermonthica in maize has been reported [22,23]. Ref.…”

Section: Introductionmentioning

confidence: 99%

Assessing Effect of Marker-Based Improvement of Maize Synthetics on Agronomic Performance, Carotenoid Content, Combining Ability and Heterosis

et al. 2020

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Vitamin A deficiency (VAD) is a serious problem in sub-Saharan Africa (SSA) and other parts of the world. Understanding the effect of marker-based improvement (MARS) of two maize synthetics (HGA and HGB) representing different heterotic groups on their agronomic performance, carotenoid content, and combining abilities could help identify suitable sources to develop divergent inbred lines for optimizing heterosis. This study involved three selection cycles each of the two synthetics and their nine varietal-cross hybrids together with a released check variety was conducted across four diverse locations in Nigeria in 2018 and 2019. Environment and hybrid effects were significant on grain yield and other agronomic traits as well as provitamin A content and other carotenoids. Genetic improvement per cycle of MARS in the parental synthetics was 15% for provitamin A, 25% for β-carotene and 26% for lutein in HGA and 4% for grain yield, 3% for zeaxanthin and 5% for α-carotene in HGB. Grain yield and agronomic traits of the two maize synthetics were controlled by additive and non-additive gene effects, while provitamin A content and other carotenoids were mainly controlled by additive gene effects. Some selection cycles which were high in grain yield and provitamin A content were identified as potential sources of new and divergent maize inbred lines in maize breeding programs. Some varietal-cross hybrids expressed significant mid-parent heterosis for grain yield and moderate mid-parent heterosis for provitamin A, β-carotene and xanthophylls. These hybrids could be commercialized at reasonable prices to small-scale farmers in rural areas that are most affected by vitamin A deficiency.

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“…KASP™ offers customisable genotyping assay to run selected SNPs in applied breeding programmes (Thompson et al, 2014 ). A set of 275 SNPs through KASP assay was used to improve the drought tolerance of maize population through MARS (Abdulmalik et al, 2017 ). Testcross genotypes were selected based on the GEBVs of 1,214 SNPs using KASP assay (Vivek et al, 2017 ).…”

Section: Maize Genomic Resourcesmentioning

confidence: 99%

“…MARS was successfully employed in maize to improve the complex quantitative traits such as yield and stover quality (Massman et al, 2013 ) and drought tolerance (Beyene et al, 2015 ). Through MARS, the number of favorable alleles for the drought tolerance has been increased from 114 in C 0 to 124 in C 3 (Abdulmalik et al, 2017 ). The frequency of favorable alleles of drought tolerance was increased from 0.510 at C 0 to 0.515 at C 2 with a genetic gain of 3% by practicing MARS in maize (Bankole et al, 2017 ).…”

Section: Marker-based Selection Approachesmentioning

confidence: 99%

Genomics-Enabled Next-Generation Breeding Approaches for Developing System-Specific Drought Tolerant Hybrids in Maize

et al. 2018

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Breeding science has immensely contributed to the global food security. Several varieties and hybrids in different food crops including maize have been released through conventional breeding. The ever growing population, decreasing agricultural land, lowering water table, changing climate, and other variables pose tremendous challenge to the researchers to improve the production and productivity of food crops. Drought is one of the major problems to sustain and improve the productivity of food crops including maize in tropical and subtropical production systems. With advent of novel genomics and breeding tools, the way of doing breeding has been tremendously changed in the last two decades. Drought tolerance is a combination of several component traits with a quantitative mode of inheritance. Rapid DNA and RNA sequencing tools and high-throughput SNP genotyping techniques, trait mapping, functional characterization, genomic selection, rapid generation advancement, and other tools are now available to understand the genetics of drought tolerance and to accelerate the breeding cycle. Informatics play complementary role by managing the big-data generated from the large-scale genomics and breeding experiments. Genome editing is the latest technique to alter specific genes to improve the trait expression. Integration of novel genomics, next-generation breeding, and informatics tools will accelerate the stress breeding process and increase the genetic gain under different production systems.

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Genetic Gains in Grain Yield of a Maize Population Improved through Marker Assisted Recurrent Selection under Stress and Non-stress Conditions in West Africa

Cited by 34 publications

References 48 publications

Recent research progress in combatting root parasitic weeds

Recent research progress in combatting root parasitic weeds

Assessing Effect of Marker-Based Improvement of Maize Synthetics on Agronomic Performance, Carotenoid Content, Combining Ability and Heterosis

Genomics-Enabled Next-Generation Breeding Approaches for Developing System-Specific Drought Tolerant Hybrids in Maize

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