From rice-like plants to plants liking rice: A review of research on weeds and their management in African rice systems

Rodenburg, Jonne; Tippe, Dennis E.; Touré, Amadou Abdourhamane; Irakiza, Runyambo; Kayeke, Juma; Bastiaans, L.

doi:10.1016/j.fcr.2021.108397

Cited by 11 publications

(16 citation statements)

References 110 publications

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“…The findings in our study suggest that many rice varieties not included in the WRC may have the same multiple resistance. Several rice varieties have thus far been reported as possessing this multiple resistance, such as Nipponbare, Umgar [ 17 ], CG14, and NERICA 1 [ 3 ]. The accessions with only one resistance, such as those in groups II (high post-attachment resistance), III (high post-attachment resistance), and IV (high pre-attachment resistance), could also be good genetic resources for improving Striga resistance in rice.…”

Section: Discussionmentioning

confidence: 99%

“…In sub-Saharan Africa, rice is the third-largest source of food energy, with a rising demand due to population growth and changes in eating habits [ 2 ]. The expansion of rice cultivation by converting fallow, maize, and sorghum fields into rainfed rice fields is one method that will help to close the gap between rice demand and production in the region [ 3 ]; however, these rainfed areas are sometimes infested by the root parasitic weed Striga hermonthica (Delile) Benth. The agricultural damage caused by Striga threatens food security for the growing population in sub-Saharan Africa.…”

Section: Introductionmentioning

confidence: 99%

“…Many Striga -resistant rice varieties that have adapted to the growing environments in Africa have already been identified [ 3 ]; however, an increased variation in Striga -resistant rice germplasms could provide new practical rice varieties for use in areas of Striga infestation. Large collections of rice germplasms have been conserved in gene banks or germplasm centers around the world [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, site-specific lignification of the endodermis at the Striga infection site is crucial to Nipponbare’s Striga resistance, as indicated by its increased susceptibility to Striga when its S-, G-, and H-unit lignin balance is disrupted [ 16 ]. Several rice varieties have been reported as resistant to Striga at the pre- and post-attachment phases [ 3 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Phenotypic Diversity in Pre- and Post-Attachment Resistance to Striga hermonthica in a Core Collection of Rice Germplasms

Samejima

Sugimoto

2022

Plants

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In sub-Saharan Africa, upland rice cultivation is expanding into rainfed areas endemic to the root parasitic weed Striga hermonthica. We evaluated the Striga resistance of 69 accessions from the World Rice Core Collection (WRC) to estimate the phenotypic diversity within the Oryza sativa species. Pre-attachment resistance was screened based on the germination-inducing activities of the root exudates, while post-attachment resistance was screened through rhizotron evaluation. The 69 WRC accessions showed a wide variation in both pre- and post-attachment resistance. Root exudates of one accession induced 0.04% germination, and those of some accessions displayed >80% germination. In the evaluation of post-attachment resistance, the successful parasitism percentages ranged from 1.3% to 60.7%. The results of these resistance evaluations were subjected to cluster analysis, which recognized five groups: group I of 27 accessions, with high pre- and post-attachment resistance; group II of 12 accessions, with high post-attachment resistance but moderate pre-attachment resistance; group III of 4 accessions, with low pre-attachment resistance; group IV of 13 accessions, with low post-attachment resistance; and group V of 13 accessions, with low pre- and post-attachment resistance. The wide variation found in the WRC accessions will help to elucidate the genetic factors underpinning pre- and post-attachment resistance.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phenotypic Diversity in Pre- and Post-Attachment Resistance to Striga hermonthica in a Core Collection of Rice Germplasms

Samejima

Sugimoto

2022

Plants

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“…The Special Issue paper by Rodenburg et al (2022b) reviews the progress in weed research targeted to rice systems in SSA, with a special focus on the period of the last 12 years. Ibrahim et al (2021) reviewed weed management options in irrigated rice systems in the Sahel of West Africa.…”

Section: Weed Managementmentioning

confidence: 99%

Towards sustainable productivity enhancement of rice-based farming systems in sub-Saharan Africa

Rodenburg

Saito²

2022

Field Crops Research

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Local perceptions of the benefits versus negative impacts of weedy grasses in central Madagascar, with a focus on the genus Digitaria

Randrianarimanana,

Rakotomalala,

MacKinnon

et al. 2024

Plants People Planet

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Societal Impact StatementPlants and agricultural practices are an integral part of human food systems and well‐being. Here, an example of an ethnobotanical research approach is provided to increase our understanding of the relationship between plants and human activities in Madagascar, where the agricultural sector is the local economy basis. This research examines weeds of the Poaceae family, assessing their recognition and societal impacts, and quantifying farmers' perception of the Poaceae weed's status in cropping systems. A better understanding of farmers' weed knowledge will strengthen our ability to inclusively support rural highland Malagasy food systems, incorporating science with traditional knowledge.Summary Research on the perceptions and knowledge of Poaceae weeds was conducted in three areas of Madagascar's central highlands: Itremo massif, Ambohidray village and Vakinankaratra region. This work aims to identify the best‐known species and understand their roles in crop and livestock systems. Additionally, it presents detailed data on Digitaria species. The approach was based on field surveys and farmer's interviews, with plant voucher specimens and photographs to facilitate identification. Relative frequency of citations, confidence interval, and use values indexes were calculated to assess cultural significance. We carried out 111 interviews, where 87 taxa were mentioned, of which 51 are Poaceae, including 11 Digitaria species. Farmers classify the Poaceae weeds in three ways: their impacts on agricultural activities, use category and vegetative growth patterns, the latter especially significant for Digitaria. Locally common grasses are perceived as weeds when they are abundant and cause yield loss. The most damaging species is Digitaria humbertii, confirmed by half of the interviews. More than 40% of the farmers use Poaceae weeds in composting, more than 20% as fodder, and more than 8% as medicine. Overall, 67% of the species mentioned are judged useful. The diversity of useful species and the associated indigenous knowledge is important to the local communities, but, weeds are still perceived as negative generally. The Poaceae are overall neglected in Malagasy ethnobotany, and an in‐depth analysis of farmer knowledge is needed. The data obtained will be useful for future studies and the conservation of agrobiodiversity, especially endemic species that are not widely known.

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From rice-like plants to plants liking rice: A review of research on weeds and their management in African rice systems

Cited by 11 publications

References 110 publications

Phenotypic Diversity in Pre- and Post-Attachment Resistance to Striga hermonthica in a Core Collection of Rice Germplasms

Phenotypic Diversity in Pre- and Post-Attachment Resistance to Striga hermonthica in a Core Collection of Rice Germplasms

Towards sustainable productivity enhancement of rice-based farming systems in sub-Saharan Africa

Local perceptions of the benefits versus negative impacts of weedy grasses in central Madagascar, with a focus on the genus Digitaria

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