scholarly journals Identification of donors for low-nitrogen stress with maize lethal necrosis (MLN) tolerance for maize breeding in sub-Saharan Africa

Euphytica ◽  
2019 ◽  
Vol 215 (4) ◽  
Author(s):  
Biswanath Das ◽  
Gary N. Atlin ◽  
Michael Olsen ◽  
Juan Burgueño ◽  
Amsal Tarekegne ◽  
...  
Keyword(s):  
Sub Saharan Africa ◽  
Nitrogen Stress ◽  
Maize Breeding ◽  
Low Nitrogen Stress ◽  
Sub Saharan ◽  
Low Nitrogen

scholarly journals Unravelling the genetic architecture of grain quality traits under optimum and low-nitrogen stress conditions using tropical maize (Zea mays L.) germplasm

2021 ◽  
Author(s):  
Noel Ndlovu ◽  
Charles Spillane ◽  
Peter C. McKeown ◽  
Jill E. Cairns ◽  
Biswanath Das ◽  
...  
Keyword(s):  
Oil Content ◽  
Grain Quality ◽  
Genetic Correlations ◽  
Snp Markers ◽  
Sub Saharan Africa ◽  
Nitrogen Stress ◽  
Quality Traits ◽  
Low Nitrogen Stress ◽  
Low Nitrogen ◽  
Nitrogen Conditions

Abstract Soils in sub-Saharan Africa are nitrogen deficient due to low fertilizer use and inadequate soil fertility management practices. This has resulted in a significant yield gap for the major staple crop maize, which is undermining nutritional security and livelihood sustainability across the region. Dissecting the genetic basis of grain protein, starch and oil content under nitrogen-starved soils can increase our understanding of the governing genetic systems and improve the efficacy of future breeding schemes. An association mapping panel of 410 inbred lines and four bi-parental populations were evaluated in field trials in Kenya and South Africa under optimum and low nitrogen conditions and genotyped with 259,798 SNP markers. Genetic correlations demonstrated that these populations may be utilized to select higher performing lines under low nitrogen stress. Furthermore, genotypic, environmental and GxE variations in nitrogen-starved soils were found to be significant for oil content. Broad sense heritabilities ranged from moderate (0.18) to high (0.86). Under low nitrogen stress, GWAS identified 42 SNPs linked to grain quality traits. These significant SNPs were associated with 51 putative candidate genes. Linkage mapping identified multiple QTLs for the grain quality traits. Under low nitrogen conditions, average prediction accuracies across the studied genotypes were higher for oil content (0.78) and lower for grain yield (0.08). Our findings indicate that grain quality traits are polygenic and that using genomic selection in maize breeding can improve genetic gain. Furthermore, the identified genomic regions and SNP markers can be utilized for selection to improve maize grain quality traits.

Expression Profiles of 10,422 Genes at Early Stage of Low Nitrogen Stress in Rice Assayed using a cDNA Microarray

2006 ◽  
Vol 60 (5) ◽  
pp. 617-631 ◽  
Author(s):  
Xingming Lian ◽  
Shiping Wang ◽  
Jianwei Zhang ◽  
Qi Feng ◽  
Lida Zhang ◽  
...  
Keyword(s):  
Cdna Microarray ◽  
Early Stage ◽  
Expression Profiles ◽  
Nitrogen Stress ◽  
Low Nitrogen Stress ◽  
Low Nitrogen

Key challenges in maize breeding in sub-Saharan Africa

2017 ◽  
pp. 51-86 ◽  
Author(s):  
Baffour Badu-Apraku ◽  
◽  
M.A.B. Fakorede ◽  
R.O. Akinwale ◽  
◽  
...  
Keyword(s):  
Sub Saharan Africa ◽  
Maize Breeding ◽  
Sub Saharan

Three NPF genes in Arabidopsis are necessary for normal nitrogen cycling under low nitrogen stress

2019 ◽  
Vol 143 ◽  
pp. 1-10 ◽  
Author(s):  
Benjamin A. Babst ◽  
Fei Gao ◽  
Lucia M. Acosta-Gamboa ◽  
Abhijit Karve ◽  
Michael J. Schueller ◽  
...  
Keyword(s):  
Nitrogen Cycling ◽  
Nitrogen Stress ◽  
Low Nitrogen Stress ◽  
Normal Nitrogen ◽  
Low Nitrogen

scholarly journals Low nitrogen stress regulates chlorophyll fluorescence in coordination with photosynthesis and Rubisco efficiency of rice

2019 ◽  
Vol 26 (1) ◽  
pp. 83-94 ◽  
Author(s):  
Aadil Yousuf Tantray ◽  
Sheikh Shanawaz Bashir ◽  
Altaf Ahmad
Keyword(s):  
Chlorophyll Fluorescence ◽  
Nitrogen Stress ◽  
Low Nitrogen Stress ◽  
Low Nitrogen

Alternative pathway is involved in the tolerance of highland barley to the low-nitrogen stress by maintaining the cellular redox homeostasis

2015 ◽  
Vol 35 (2) ◽  
pp. 317-328 ◽  
Author(s):  
Feng Wang ◽  
Xiaomin Wang ◽  
Chengzhou Zhao ◽  
Jianfeng Wang ◽  
Ping Li ◽  
...  
Keyword(s):  
Alternative Pathway ◽  
Redox Homeostasis ◽  
Nitrogen Stress ◽  
Cellular Redox ◽  
Low Nitrogen Stress ◽  
Low Nitrogen ◽  
Highland Barley

scholarly journals Cell Production and Expansion in the Primary Root of Maize in Response to Low-Nitrogen Stress

2014 ◽  
Vol 13 (11) ◽  
pp. 2508-2517 ◽  
Author(s):  
Kun GAO ◽  
Fan-jun CHEN ◽  
Li-xing YUAN ◽  
Guo-hua MI
Keyword(s):  
Primary Root ◽  
Nitrogen Stress ◽  
Cell Production ◽  
Low Nitrogen Stress ◽  
Low Nitrogen

Low-nitrogen stress tolerance and nitrogen agronomic efficiency among maize inbreds: comparison of multiple indices and evaluation of genetic variation

Euphytica ◽  
2011 ◽  
Vol 180 (2) ◽  
pp. 281-290 ◽  
Author(s):  
Yongshen Wu ◽  
Wenguo Liu ◽  
Xinhai Li ◽  
Mingshun Li ◽  
Degui Zhang ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Stress Tolerance ◽  
Nitrogen Stress ◽  
Agronomic Efficiency ◽  
Low Nitrogen Stress ◽  
Maize Inbreds ◽  
Low Nitrogen
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