Breeding for improved abiotic stress tolerance in maize adapted to southern Africa

Bänziger, Marianne; Setimela, P.S.; Hodson, David; Vivek, B.

doi:10.1016/j.agwat.2005.07.014

Cited by 257 publications

(220 citation statements)

References 34 publications

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“…The maize yield in Africa is only 1.3 tons hm 2 because of LN and drought stress. Therefore, LNE cultivars are crucial to address the food security problem worldwide [15,34]. In the present study, LNE cultivars showed a potential increase in yield of 12% (Table 7).…”

Section: Potential Reduction In N Fertilizer Input And/or Increased Ymentioning

confidence: 56%

Evaluation of the yield and nitrogen use efficiency of the dominant maize hybrids grown in North and Northeast China

Chen

Fang

Gao

et al. 2013

Sci. China Life Sci.

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Breeding high-yielding and nutrient-efficient cultivars is one strategy to simultaneously resolve the problems of food security, resource shortage, and environmental pollution. However, the potential increased yield and reduction in fertilizer input achievable by using high-yielding and nutrient-efficient cultivars is unclear. In the present study, we evaluated the yield and nitrogen use efficiency (NUE) of 40 commercial maize hybrids at five locations in North and Northeast China in 2008 and 2009. The effect of interaction between genotype and nitrogen (N) input on maize yield was significant when the yield reduction under low-N treatment was 25%-60%. Based on the average yields achieved with high or low N application, the tested cultivars were classified into four types based on their NUE: efficient-efficient (EE) were efficient under both low and high N inputs, high-N efficient (HNE) under only high N input, low-N efficient (LNE) under only low N input, and nonefficient-nonefficient under neither low nor high N inputs. Under high N application, EE and HNE cultivars could potentially increase maize yield by 8%-10% and reduce N input by 16%-21%. Under low N application, LNE cultivars could potentially increase maize yield by 12%. We concluded that breeding for N-efficient cultivars is a feasible strategy to increase maize yield and/or reduce N input. maize, genotype×nitrogen interaction, low nitrogen stress, nitrogen use efficiency, yield Citation:Chen F J, Fang Z G, Gao Q, et al. Evaluation of the yield and nitrogen use efficiency of the dominant maize

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Section: Potential Reduction In N Fertilizer Input And/or Increased Ymentioning

confidence: 56%

Evaluation of the yield and nitrogen use efficiency of the dominant maize hybrids grown in North and Northeast China

Chen

Fang

Gao

et al. 2013

Sci. China Life Sci.

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“…These results are in-line with findings of Badu-Apraku et al (2014) who reported highly significant location effect for maize grain yield measured under two Striga-free environments. Bӓnziger et al (2004) suggested the need to do selections under carefully managed high priority abiotic stress sites, indicating that this initiative can significantly increase yields in a highly variable drought-prone environment. However, an experiment done by Miti et al (2010) under low nitrogen soils showed a low heritability estimate (0.38) for grain yield indicating that selection based on grain yield under low-N was ineffective.…”

Section: Discussionmentioning

confidence: 99%

“…The mid-altitude zone falls within the altitudinal range of between 1000 and 1800 masl and it is characterized by rainfall of more than 500mm and mean temperature of 21.5 o C. The social-economic constraints, such as high inorganic fertilizer costs and lack of credit for small scale farmers ) are further worsening the bio-physical constraints that are hampering maize production. Hence development of maize hybrids that can adapt to these stresses is important (Hoisington, 2001;Betrán et al, 2003;Bӓnziger et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Combining Ability for Grain Yield Performance among CIMMYT Germplasm Adapted to the Mid-Altitude Conditions

Kamutando¹,

Magorokosho²,

Dari³

2018

JAS

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The International Centre for Maize and Wheat Improvement (CIMMYT) develops maize (Zea mays L.) inbred lines and hybrids yearly that have several breeding and commercial attributes. However, no genetic analysis has been done on the recently developed inbred lines for yield performance under drought and low-N stress. The objectives of this study were to identify lines with positive general combining ability (GCA) effects for grain yield under stress environments and to identify the best single-cross hybrids with the highest specific combining ability (SCA) effects. Analysis of variance combined across sites showed significant mean squares for genotypes, locations and genotype by environment interaction (GEI) for grain yield. GCA lines , SCA and components of interaction effects were significant across sites. Additive genetic variance was more important than dominance variance in determining yield performance across locations indicating that selection based on grain yield under drought and low-N stress can be effective. Average grain yield across the eight locations ranged from 1.61 t ha -1 to 10.63 t ha -1 while narrow sense heritability for grain yield was 52.6% across sites and was slightly lower under managed drought and low-N stress. The testers CL115807 and CL106622 showed positive and significant GCA effects for yield performance under drought and low-N stress respectively. The best tester across all sites was CL115793 and line CZL0713 had consistently positive GCA effects for grain yield across sites. CML536 × CL115802 and CML312 × CL106508 were the best single crosses under low nitrogen stress sites while hybrid CML312 × C323-45 showed the highest positive SCA effects across sites. In conclusion, our results show that CIMMYT has new lines that have desirable adaptive attributes when grown under drought and low nitrogen stress environments in the mid-altitude region; hence these can be adopted for hybrid, synthetic and OPV formation.

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“…Salah satu cara menekan penurunan hasil jagung akibat cekaman kekeringan dan dosis pupuk N rendah adalah menanam varietas toleran kekeringan dan adaptif pemupukan N rendah (Bänziger et al 2006;Nyombayire et al 2011;Syafruddin et al 2013;Sayadi et al 2016;Masuka et al 2017). Varietas unggul jagung hibrida toleran kekeringan dan N rendah dapat diperoleh melalui program pemuliaan tanaman (Harrison et al 2014).…”

Section: Pendahuluanunclassified

Daya Gabung Inbrida Jagung Toleran Cekaman Kekeringan dan Nitrogen Rendah pada Pembentukan Varietas Hibrida

Efendi

Takdir

Azrai

2017

j. penelit. pertan. tanam. pangan

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Breeding for improved abiotic stress tolerance in maize adapted to southern Africa

Cited by 257 publications

References 34 publications

Evaluation of the yield and nitrogen use efficiency of the dominant maize hybrids grown in North and Northeast China

Evaluation of the yield and nitrogen use efficiency of the dominant maize hybrids grown in North and Northeast China

Combining Ability for Grain Yield Performance among CIMMYT Germplasm Adapted to the Mid-Altitude Conditions

Daya Gabung Inbrida Jagung Toleran Cekaman Kekeringan dan Nitrogen Rendah pada Pembentukan Varietas Hibrida

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