Hybrid rice in Africa: challenges and prospects.

El-Namaky, Raafat; Demont, Matty; Wopereis, M.C.S.; Johnson, D. E.; Ahmadi, Nourollah; Tollens, Éric; Jalloh, A.

doi:10.1079/9781845938123.0173

Cited by 10 publications

(9 citation statements)

References 1 publication

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“…Majority of the farmers as a result were expecting a minimum of 50% yield advantage over their currently grown variety to guarantee adoption of hybrid varieties. This expected yield advantage is quite huge since a yield advantage of 15-20% is currently possible (Abebrese et al, 2019;El-namaky & Demont, 2013;IRRI, 1997). Thus, the realizable yield advantage of hybrids will be a major determinant for adoption.…”

Section: Farmers' Knowledge and Willingness To Cultivate Hybrid Ricementioning

confidence: 99%

“…Given that the cost of hybrid rice seed is normally high and requires a major investment, farmers are required to adopt seed saving and productive agronomic practices to enable them realize the expected yield benefits of hybrids (Spielman, Kolady, & Ward, 2013). The hybrid system serves as a motivation and opportunity for private seed companies to recoup their investment (Breseghello & Coelho, 2013;Spielman et al, 2013) and, as a result, encourages private-sector involvement in seed production research and development (El-namaky & Demont, 2013;Spielman et al, 2013). Commercialization of hybrid varieties therefore requires a strong formal seed distribution channel which is well patronized by farmers.…”

Section: Introductionmentioning

confidence: 99%

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Farmer Preferred Traits and Potential for Adoption of Hybrid Rice in Ghana

Abebrese¹,

Martey²,

Dartey³

et al. 2019

SAR

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Hybrid rice (Oryza sativa L) cultivars exploit hybrid vigor to break the yield ceiling of their inbred counterpart thereby increasing productivity per unit area. Crop varieties released in developing countries are often poorly adopted as a result of their failure to meet farmer and consumer trait preferences. This study was therefore conducted to identify key farmer preferred traits, assess farmers' general rice agronomic practices and the potential for adoption of hybrid rice through formal and informal survey approaches. Farmer preferred traits include high yield, early maturity, and good grain quality, but few others, their preferences varied according to location. High cost of hybrid rice seeds was identified as a major challenge. There will be the need for reasonable pricing such that the return from growing hybrid seed is high enough for farmers to recognize the value of growing hybrids. Forty per cent (40%) of the responding farmers were found to employ seed wasting practices such as broadcasting and dibbling. Farmers gave mistrust and unreliable seed supply as the main reasons for their low patronage of the formal seed system. Only two per cent (2%) of the responding farmers purchase seeds from private seed companies. It will be necessary to revamp the formal seed system to encourage farmer patronage and private sector involvement for successful roll out of hybrid rice technology in Ghana. Considering the expected yield advantage (>50%) and the price farmers will like to pay (GH¢3.3; $0.8), the prospects of hybrid rice adoption could said to be low.

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Section: Farmers' Knowledge and Willingness To Cultivate Hybrid Ricementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Farmer Preferred Traits and Potential for Adoption of Hybrid Rice in Ghana

Abebrese¹,

Martey²,

Dartey³

et al. 2019

SAR

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“…is presents an opportunity for private seed companies and encourages private-sector involvement in seed production, research, and development [13]. Since the hybrid varieties yield 15-20% more than the pure line varieties, farmers prefer hybrid seeds if the price is economically beneficial and seeds are reliably available [14].…”

Section: Introductionmentioning

confidence: 99%

“…It is also effectively utilized in Brazil and the USA [12]. In Africa, Egypt is the only country which has successfully developed a hybrid rice breeding program that produces local rice hybrids on a commercial scale [13]. AfricaRice (Africa Rice Centre) initiated a hybrid breeding program in 2010 to develop superior hybrids for sub-Saharan African countries [13,17].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Yield, Reaction to Diseases, and Grain Physical Attributes of Some Introduced Rice Hybrids in Ghana

Abebrese

Yeboah

Dogbe

et al. 2019

International Journal of Agronomy

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Hybrid rice technology is one of the promising, sustainable, and proven technologies for increasing rice production and productivity with a yield advantage of 15–30% over modern inbred varieties. The potential of hybrid rice has so far not been exploited in Ghana. This study was undertaken to evaluate the yield potential, reaction to diseases, and physical grain attributes of some introduced hybrids. The trials were laid out in a randomized complete block design (RCBD) with three replicates across three locations. Data were taken on grain yield, yield components, reaction to diseases, and grain physical characteristics. Four promising hybrids (SWARNA 2, ARGH 1501, ARGH 1502, and ARGH 1503) with a mean yield advantage of 15–20.8% over the best inbred check “AgraRice” were identified. With few exceptions, the hybrids were broadly adapted and had adequate resistance to blast and bacterial leaf blight. Most of the test hybrids had long slender grains which make them acceptable to the Ghanaian market but lacked aroma.

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“…In 2010, AfricaRice began breeding hybrid rice using both cytoplasmic male sterile and environmental genetic male sterile systems [14,15]. In this study, 216 maintainer lines were evaluated for their floral and agronomic characteristics.…”

Section: Introductionmentioning

confidence: 99%

The Genetic Variability of Floral and Agronomic Characteristics of Newly-Bred Cytoplasmic Male Sterile Rice

El-Namaky¹

2018

Agriculture

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Male sterility enabled commercialization of heterosis in rice but low seed set remains a constraint on hybrid dissemination. We evaluated 216 F 6 maintainer lines for agronomic and floral characteristics in augmented design and selected 15 maintainer lines, which were testcrossed with IR58025A. Five backcrosses were conducted to transfer cytoplasmic male sterility (CMS) to select maintainer lines. Newly-bred BC 5:6 CMS lines were evaluated for outcrossing rates and agronomic characteristics. There were highly significant differences among 216 F 6 maintainer lines for characteristics whose genotypic variance was higher than environmental variance. The phenotypic coefficient of variation was almost the same as the genotypic coefficient of variation, indicating that most phenotypic variation was due to genetics. There were highly significant differences among CMS lines for number of days to 50% flowering and maturity; stigma exertion; panicle exertion, length and weight; spikelet fertility; tillers per plant; plant height; grains per panicle; grain yield per plant; and 1000-grain weight, but not for pollen and panicle sterility during dry and wet seasons. Three CMS lines (CMS3, CMS12, and CMS14), exhibited high outcrossing rates (56.17%, 51.42% and 48.44%, respectively), which had a highly significant, positive correlation with stigma exertion (0.97), spikelet opening angle (0.82), and panicle exertion (0.95).

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Hybrid rice in Africa: challenges and prospects.

Cited by 10 publications

References 1 publication

Farmer Preferred Traits and Potential for Adoption of Hybrid Rice in Ghana

Farmer Preferred Traits and Potential for Adoption of Hybrid Rice in Ghana

Evaluation of Yield, Reaction to Diseases, and Grain Physical Attributes of Some Introduced Rice Hybrids in Ghana

The Genetic Variability of Floral and Agronomic Characteristics of Newly-Bred Cytoplasmic Male Sterile Rice

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