Rice yield growth analysis for 24 African countries over 1960–2012

Saito, Kazuki; Dieng, Ibnou; Touré, Ali A.; Somado, Eklou A.; Wopereis, M.C.S.

doi:10.1016/j.gfs.2014.10.006

Cited by 63 publications

(46 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Despite this increase in production, the rice sector faces major constraints such as yield-limiting factors (drought or excess water, lack of nutrients, extreme temperatures), biotic factors (insects, diseases, weeds, birds), and socioeconomic issues (market access, access to knowledge and technology, etc.) (Saïto et al, 2015). These various constraints cannot be overcomed without the knowledge of varietal diversity, variety performances and farmers' preferences.…”

Section: Introductionmentioning

confidence: 99%

Diversity, Genetic Erosion and Participatory Evaluation of Rice (Oryza sativa L. and Oryza glaberrima Steud) Varieties in Benin

Odjo¹,

Dossou-Aminon²,

Dansi³

et al. 2017

Int. J. Curr. Res. Biosci. Plant Biol.

View full text Add to dashboard Cite

A b s t r a c t A r t i c l e I n f oRice, is one of the most important food crops that significantly contributes to food security in Benin. To assess its varietal diversity within the country, 55 villages randomly selected throughout different agro-ecological zones were surveyed using participatory research tools and techniques. Subject to synonymy, 95 varieties including 2 African rice (Oryza glaberrima) and 93 Asian rice (Oryza sativa) were inventoried. The Shannon Diversity Index (H) is 5.62 and reflects an important varietal diversity. The number of varieties recorded varies from 2 to 9 per village (4 on average). In villages where varietal diversity is threatened, the rate of loss, subject to synonymy, varied from 25% to 75% with an average rate of 41% per village. Across villages, the varieties to be produced are selected on the basis of sixteen (16) preference criteria, of which the most important are high productivity (18.22% responses), market value (14.52% of responses), early maturity of varieties (10.48% of responses) and taste (6.92% of responses). Thirteen (13) production constraints were reported by the producers and most of them can be overcomed by the use of high-performing varieties. Participatory evaluation revealed very few effective varieties with regard to biotic and abiotic parameters. The development in Benin of a strong and concerted national rice breeding program is necessary and will help creating novel varieties that will boost national production, food security and income generation.

show abstract

Section: Introductionmentioning

confidence: 99%

Diversity, Genetic Erosion and Participatory Evaluation of Rice (Oryza sativa L. and Oryza glaberrima Steud) Varieties in Benin

Odjo¹,

Dossou-Aminon²,

Dansi³

et al. 2017

Int. J. Curr. Res. Biosci. Plant Biol.

View full text Add to dashboard Cite

show abstract

“…In order to enhance food security, it is imperative for SSA countries to increase domestic rice production. Since rice production in SSA is mostly dependent on rainfed upland ecosystems (Rodenburg et al, 2014;Saito et al, 2015), the future of rice production in SSA critically depends on the development of upland rice cultivation. The advent at the turn of the century of NERICA (New Rice for Africa), a series of upland rice varieties that are the interspecific progenies of Oryza glaberrima and O. sativa developed by the Africa Rice Center (AfricaRice, then WARDA) (Jones et al, 1997), coupled with national as well as international efforts toward the development of rice production in SSA (AGRA/JICA, 2008), has helped to develop adapted upland varieties and promote upland rice cultivation in SSA.…”

Section: Introductionmentioning

confidence: 99%

Effects of plant density on the performance of selected African upland rice varieties

Matsumoto¹,

Tsuboi²,

Asea³

et al. 2017

Afr. J. Agric. Res.

View full text Add to dashboard Cite

The effects of plant density on yield and yield components in upland rice cultivation were examined by conducting a series of field experiments in Central Uganda, using three African and one Japanese improved upland rice varieties. The estimation of plant-density response functions with respect to yield components and yield revealed that an increase in plant density significantly decreased the number of panicles per hill, number of spikelets per panicle, and 1000-grain weight, and significantly increased the number of panicles per square meter. The percentage of filled grain was not affected by plant density. Compared to the Japanese variety, the three African varieties were characterized by more numbers of panicles/hill, less numbers of spikelets/panicle, higher grain-filling ratio and lighter 1000-grain weight, but differences in the degrees of response to plant density were less distinct between them. Rice yield increased in the range of plant density tested, though the marginal increase in yield due to an increase in plant density by 1 hill/m 2 diminished from 100 kg/ha at the plant density of 11 hills/m 2 to 30 kg/ha at 33 hills/m 2 . No significant differences were found among the four varieties for the level of yield as well as for its degree of positive response to plant density. The yield components that determined the increase in yield were the number of panicles per square meter and the number of spikelets per panicle, or combined together, the number of spikelets per square meter, which was estimated to reach the maximum at the plant density of 35 hills/m 2 . When the differences among the treatments in the costs of seeds and weed-control were considered, the optimum plant density was found to be 22 hills/m 2 (plantspacing of 30 cm × 15 cm), lower than the plant density that gives the maximum yield.

show abstract

“…Annually, Africa imports about 13 million tons of milled rice which is equivalent to about one-third of the world market (FAO, 2013). In 2008, growing concern about global food security led to a spike in food prices, particularly in rice, that consequently led to social unrest (Saito et al, 2015). As a result of this 'rice crisis', African governments and the international donor community embarked on ambitious rice-development programs to achieve self-sufficiency (Saito et al, 2015).…”

mentioning

confidence: 99%

Genetic Improvement of Iron Toxicity Tolerance in Rice-Progress, Challenges and Prospects in West Africa

Sikirou

Saito

Achigan‐Dako

et al. 2015

Plant Production Science

Self Cite

View full text Add to dashboard Cite

Rice yield growth analysis for 24 African countries over 1960–2012

Cited by 63 publications

References 27 publications

Diversity, Genetic Erosion and Participatory Evaluation of Rice (Oryza sativa L. and Oryza glaberrima Steud) Varieties in Benin

Diversity, Genetic Erosion and Participatory Evaluation of Rice (Oryza sativa L. and Oryza glaberrima Steud) Varieties in Benin

Effects of plant density on the performance of selected African upland rice varieties

Genetic Improvement of Iron Toxicity Tolerance in Rice-Progress, Challenges and Prospects in West Africa

Contact Info

Product

Resources

About