Increasing grain yield in bread wheat ( Triticum aestivum ) by selection for high spike fertility index

2021 ◽  
Author(s):  
Ana Clara Pontaroli ◽  
María Pía Alonso ◽  
Nadia Estefania Mirabella ◽  
Juan Sebastián Panelo ◽  
María Fiorella Franco ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Bread Wheat ◽  
Fertility Index ◽  
Selection For

scholarly journals Selection for high spike fertility index increases genetic progress in grain yield and stability in bread wheat

Euphytica ◽  
2018 ◽  
Vol 214 (7) ◽  
Author(s):  
M. P. Alonso ◽  
N. E. Mirabella ◽  
J. S. Panelo ◽  
M. G. Cendoya ◽  
A. C. Pontaroli
Keyword(s):  
Grain Yield ◽  
Bread Wheat ◽  
Genetic Progress ◽  
Fertility Index ◽  
Selection For

scholarly journals Increasing Grain Yield in Bread Wheat (Triticum aestivum L.) by Selection for High Spike Fertility Index

2020 ◽  
Author(s):  
Ana Clara Pontaroli ◽  
María Pía Alonso ◽  
Nadia Estefania Mirabella ◽  
Juan Sebastián Panelo ◽  
María Fiorella Franco ◽  
...  
Keyword(s):  
Grain Yield ◽  
Bread Wheat ◽  
Selection Criterion ◽  
Triticum Aestivum L ◽  
Grain Protein Content ◽  
Wheat Breeding ◽  
Genetic Progress ◽  
Fertility Index ◽  
Ril Population ◽  
Selection For

ABSTRACTSpike fertility index (SF; a.k.a. fruiting efficiency at maturity) has been proposed as a promising selection criterion for increasing grain yield (GY) in bread wheat. In this study, changes in GY and related traits after simulated selection (10% intensity) for high SF or high GY were assessed in (i) a RIL population of 90 individuals (Avalon/Glupro) (ii) a RIL population of 146 individuals (Baguette 10/Klein Chajá); (iii) 28-36 advanced lines from a breeding program. Grain yield, SF, grain number per unit area (GN), grain weight, test weight and grain protein content were determined. Regardless of the environmental conditions, simulated selection for high SF alone always resulted in GN increases (between 1.6 and 27.4%). Average GY increase observed after simulated selection for high SF (5.6%; N=20; S2 =80.1) did not differ (p=0.2) from the average GY increase observed after simulated selection for GY per se (12.9%; N=12; S2 =308.1). Our findings validate the use of SF as a selection criterion for increasing genetic progress of grain yield in bread wheat breeding programs.

scholarly journals Nutrient uptake, use efficiency and productivity of bread wheat (Triticum aestivum L.) as affected by nitrogen and potassium fertilizer in Keddida Gamela Woreda, Southern Ethiopia

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Temesgen Godebo ◽  
Fanuel Laekemariam ◽  
Gobeze Loha
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Nutrient Uptake ◽  
Bread Wheat ◽  
Block Design ◽  
N Uptake ◽  
Fertilizer Application ◽  
Southern Ethiopia ◽  
K Fertilizer ◽  
Use Efficiency

AbstractBread wheat (Triticum aestivum L.) is one of the most important cereal crops in Ethiopia. The productivity of wheat is markedly constrained by nutrient depletion and inadequate fertilizer application. The experiment was conducted to study the effect of nitrogen (N) and potassium (K) fertilizer rates on growth, yield, nutrient uptake and use efficiency during 2019 cropping season on Kedida Gamela Woreda, Kembata Tembaro Zone Southern Ethiopia. Factorial combinations of four rates of N (0, 23, 46 and 69 kg Nha−1) and three rates of K2O (0, 30 and 60 kg Nha−1) in the form of urea (46–0-0) and murate of potash (KCl) (0-0-60) respectively, were laid out in a randomized complete block design with three replications. The results showed that most parameters viz yield, yield components, N uptake and use efficiency revealed significant differences (P < 0.05) due to interaction effects of N and K. Fertilizer application at the rate of 46 N and 30 kg K ha−1 resulted in high grain yield of 4392 kg ha− 1 and the lowest 1041 from control. The highest agronomic efficiency of N (52.5) obtained from the application of 46 kg N ha−1. Maximum physiological efficiency of N (86.6 kg kg−1) and use efficiency of K (58.6%) was recorded from the interaction of 46 and 30 kg K ha−1. Hence, it could be concluded that applying 46 and 30 kg K ha−1was resulted in high grain yield and economic return to wheat growing farmers of the area. Yet, in order to draw sound conclusion, repeating the experiment in over seasons and locations is recommended.

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