scholarly journals Maize yield, biomass and grain quality traits responses to delayed sowing date and genotypes in rain-fed condition

2019 ◽  
pp. 415
Author(s):  
Qingjun Cao, Gang Li, Fentuan Yang, Xiaoli Jiang ◽  
Lamine Diallo, Enping Zhang ◽  
Fanli Kong
Keyword(s):  
Climate Change ◽  
Grain Yield ◽  
Kernel Weight ◽  
Yield Potential ◽  
Yield Reduction ◽  
Quality Traits ◽  
Maize Grain Yield ◽  
Yield And Quality ◽  
Maize Grain ◽  
Grain Yield And Quality

Delayed sowing (DS) is a critical factor influencing grain yield and quality under climate change. This study was conducted to determine maize grain yield and quality traits responses to DS and varied genotypes in rain-fed condition, northeast of China. Two typical hybrids ZD958 (higher starch type) and LM33 (higher protein type) and three sowing dates: 30 April (DS0) as normal, 10 May (DS10) and 20 May (DS20) were compared. Results demonstrated maize grain yield, biomass, kernel number per square, thousand kernel weight (TKW), grain nutrition yield, N concentration and grain test weight were significantly reduced by DS. Compared to high protein type LM33, high starch type ZD958 had a higher yield potential and lower yield reduction with delayed sowing. Grain yield loss under DS could be mainly attributed to reduction of the BMP and biomass, thereby leading to the reduction of TKW and kernels number per unit. DS didn’t affected grain nutritional content (starch, protein and oil), while significantly reduced grain nutrition yield of starch, oil and protein with delayed sowing. This study suggests that, early sowing should be recommended to the framers and varieties adjustments maybe a possible approach to reduce and compensate for the loss of yield caused by delayed sowing in rain-fed condition under climate change in NCP.

Heat Stress at Different Grain Filling Stages Affects Fresh Waxy Maize Grain Yield and Quality

2015 ◽  
Vol 92 (3) ◽  
pp. 258-264 ◽  
Author(s):  
Huan Yang ◽  
Dalei Lu ◽  
Xin Shen ◽  
Xuemei Cai ◽  
Weiping Lu
Keyword(s):  
Heat Stress ◽  
Grain Yield ◽  
Grain Filling ◽  
Waxy Maize ◽  
Maize Grain Yield ◽  
Yield And Quality ◽  
Maize Grain ◽  
Grain Yield And Quality

scholarly journals Assessment of Genetic Diversity for Drought, Heat and Combined Drought and Heat Stress Tolerance in Early Maturing Maize Landraces

Plants ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 518 ◽  
Author(s):  
Nelimor ◽  
Badu-Apraku ◽  
Tetteh ◽  
N’guetta
Keyword(s):  
Climate Change ◽  
Heat Stress ◽  
Drought Stress ◽  
Grain Yield ◽  
Yield Potential ◽  
Yield Reduction ◽  
International Institute ◽  
Improvement Program ◽  
Maize Varieties ◽  
Drought And Heat Stress

Climate change is expected to aggravate the effects of drought, heat and combined drought and heat stresses. An important step in developing ‘climate smart’ maize varieties is to identify germplasm with good levels of tolerance to the abiotic stresses. The primary objective of this study was to identify landraces with combined high yield potential and desirable secondary traits under drought, heat and combined drought and heat stresses. Thirty-three landraces from Burkina Faso (6), Ghana (6) and Togo (21), and three drought-tolerant populations/varieties from the Maize Improvement Program at the International Institute of Tropical Agriculture were evaluated under three conditions, namely managed drought stress, heat stress and combined drought and heat stress, with optimal growing conditions as control, for two years. The phenotypic and genetic correlations between grain yield of the different treatments were very weak, suggesting the presence of independent genetic control of yield to these stresses. However, grain yield under heat and combined drought and heat stresses were highly and positively correlated, indicating that heat-tolerant genotypes would most likely tolerate combined drought and stress. Yield reduction averaged 46% under managed drought stress, 55% under heat stress, and 66% under combined drought and heat stress, which reflected hypo-additive effect of drought and heat stress on grain yield of the maize accessions. Accession GH-3505 was highly tolerant to drought, while GH-4859 and TZm-1353 were tolerant to the three stresses. These landrace accessions can be invaluable sources of genes/alleles for breeding for adaptation of maize to climate change.

scholarly journals Malting Barley Diseases, Yield and Quality – Responses to Using Various Agro-Technology Regimes

2017 ◽  
Vol 71 (1-2) ◽  
pp. 57-62 ◽  
Author(s):  
Tiia Kangor ◽  
Pille Sooväli ◽  
Ylle Tamm ◽  
Ilmar Tamm ◽  
Mati Koppel
Keyword(s):  
Grain Yield ◽  
Protein Content ◽  
Weather Conditions ◽  
Kernel Weight ◽  
Barley Variety ◽  
Test Weight ◽  
Quality Traits ◽  
Infection Level ◽  
Fungicide Treatment ◽  
Yield And Quality

Abstract Pyrenophora teres (net blotch) and Cochliobolus sativus (spot blotch), the most widely spread diseases in the Northern Baltic region, have high impact on cereal production. The effect of three levels of fertilisation and two fungicide treatments on the severity of barley diseases, grain yield and quality traits (protein content, test weight, thousand kernel weight (TKW), grading) was tested during a period of three years. Weather conditions during the growing season highly determined disease severity, yield and quality. In addition, the infection level of P. teres was more dependent on fungicide treatment (p ≤ 0.001) and barley variety (p ≤ 0.001) while C. sativus infection was influenced more by fertilisation (p ≤ 0.001) and year x fertilisation interaction (p ≤ 0.001). Fungicide treatment had no influence on grain yield and protein content, but slightly improved TKW (p ≤ 0.05), test weight (p ≤ 0.001) and grading (p ≤ 0.001). However, these quality traits were mostly influenced by barley variety (p ≤ 0.001). TKW and test weight were highest at fertilisation level N80P12K43. The effect of year and fertilisation contributed significantly to the grain protein content. Grain yield and protein content were highest at the maximum fertiliser application (N100P15K54).

scholarly journals Grain yield and quality responses of wheat expressing a barley sucrose transporter to combined climate change factors

2017 ◽  
Vol 68 (20) ◽  
pp. 5511-5525 ◽  
Author(s):  
Heiko Weichert ◽  
Petra Högy ◽  
Isabel Mora-Ramirez ◽  
Jörg Fuchs ◽  
Kai Eggert ◽  
...  
Keyword(s):  
Climate Change ◽  
Grain Yield ◽  
Sucrose Transporter ◽  
Change Factors ◽  
Yield And Quality ◽  
Grain Yield And Quality
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