scholarly journals Assessment of morphological characteristics among upland rice (Oryza sativa and Oryza glaberrima) germplasm

2018 ◽  
Vol 17 (29) ◽  
pp. 906-914
Author(s):  
Luther Zogbo ◽  
Akromah Richard ◽  
P. Tokpah David ◽  
Page Zipporah
Keyword(s):  
Oryza Sativa ◽  
Upland Rice ◽  
Morphological Characteristics ◽  
Oryza Glaberrima

scholarly journals Field performance of heat tolerant mutant rice lines generated from Oryza sativa and Oryza glaberrima

2021 ◽  
pp. 69-78
Author(s):  
Paul Mbogo Kusolwa ◽  
Yona Neema ◽  
Masanche Rajab ◽  
Ashura, Luzi- Kihupi ◽  
Fatma Sarsu
Keyword(s):  
Oryza Sativa ◽  
Field Experiments ◽  
Upland Rice ◽  
Field Performance ◽  
Oryza Glaberrima ◽  
Spikelet Sterility ◽  
Variable Expression ◽  
Drought Tolerant ◽  
Tolerant Mutant ◽  
Mutant Lines

This study evaluated mutant lines developed from two cultivated species of upland rice, Oryza sativa, and Oryza glaberrima, in field experiments conducted during the hot and dry seasons of 2014/2015 in Morogoro, Tanzania. The growth yield and yield components of 34 and 14 Gamma induced mutant upland rice lines developed from O. sativa (Kihogo red) and O. glaberrima were evaluated, respectively. The mutant lines were selected based on variable expression of heat shock protein genes (HSPs) in previously conducted heat tolerance studies. The minimum and maximum temperatures and rainfall during the field performance experiment were measured between 20 oC and 35 oC, and 32.7 mm and 155.5 mm, respectively. The data for 12 yield and yield component parameters such as days to early and 50% flowering, days to physical maturity, plant height, number of tillers, number of panicles, spikelets, filled grains, unfilled grains and 1,000 grain weights were collected and analysed using ANOVA and Principal Component Analysis. Significant differences (P≤0.05) were obtained among the mutant lines in terms of grain yield, spikelet sterility and other variables, which were further used as criteria for selection of heat and drought tolerant rice lines. Eight heat and drought tolerant mutant rice lines with high yields (over 3.5 ton/ha) and low spikelet sterility were selected for further advancement in breeding programmes

scholarly journals Water and Nitrogen (N) Use Efficiency of Upland Rice (Oryza sativa L. × Oryza glaberrima Steud) under Varying N Application Rates

Nitrogen ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 151-166
Author(s):  
Isaac Newton Alou ◽  
Michael van der Laan ◽  
John George Annandale ◽  
Joachim Martin Steyn
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Rice Variety ◽  
N Uptake ◽  
Sub Saharan Africa ◽  
Oryza Glaberrima ◽  
Use Efficiency ◽  
N Rates

Upland rice (Oryza sativa L.) production systems in sub-Saharan Africa are faced with challenges of water stress and nitrogen (N) deficiency, which reduce grain yield, water use efficiency (WUE), and nitrogen use efficiency (NUE). The objective of the study was to determine the response of upland rice to N fertilizer rates under well-watered conditions and to clarify the relationships between WUE and NUE. Upland rice variety Nerica 10 was grown under well-watered conditions and varying N rates in 2014/2015 (Y1) and 2015/2016 (Y2) on the same field at the University of Pretoria’s Hatfield Experimental Farm, South Africa. Yields at harvest increased with increasing N rates, linearly in Y1, and following a quadratic trend in Y2. Mean grain yield was highest (4.5 t ha−1) at 120 kg N ha−1 and lowest (2.4 t ha−1) at 0 kg N ha−1. Agronomic NUE was lowest for 160 kg N ha−1 (11.7 kg kg−1 N), while WUE was highest for the 120 kg N ha−1 (7.58 ± 1.7 kg mm−1) and lowest for 0 kg N ha−1 (4.1 ± 0.9 kg mm−1). Findings revealed that at high N levels, compensative N uptake during tillering can reduce harvest index, WUE, and to a lesser extent, grain N concentration.

Effects of sorbitol on expression of genes involved in regeneration of upland rice (Oryza sativa L.)

2011 ◽  
Vol 106 (3) ◽  
pp. 455-463 ◽  
Author(s):  
Xiaolei Feng ◽  
Pengke Zhao ◽  
Jianqin Hao ◽  
Jinquan Hu ◽  
Dingming Kang ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Expression Of Genes

scholarly journals Growth performance of several promising local upland rice (Oryza sativa L.) genotypes of Southeast Sulawesi

2021 ◽  
Vol 807 (4) ◽  
pp. 042080
Author(s):  
T Wijayanto ◽  
Ramdayani ◽  
Arditya ◽  
Asniah ◽  
N W S Suliartini ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Growth Performance ◽  
Upland Rice ◽  
Oryza Sativa L

Genetic Diversity of Local Upland Rice (Oryza sativa L.) Genotypes Based on Agronomic Traits and Yield Potential in North Buton, Indonesia

2017 ◽  
Vol 9 (4) ◽  
pp. 109-117 ◽  
Author(s):  
Budianti Kadidaa ◽  
Gusti Ray Sadimantar ◽  
Suaib . ◽  
La Ode Safuan ◽  
Muhidin .
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Agronomic Traits ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Yield Potential
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