Biogeography and Genetic Diversity of Pearl Millet (<i>Pennisetum glaucum</i>) from Sahelian Africa

Lewis, Laura R.

doi:10.1080/00330124.2010.483640

Cited by 11 publications

(14 citation statements)

References 62 publications

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“…Biogeographical research and landscape genetics are two examples of approaches which can yield useful data on agrobiodiversity patterns in relation to seed exchange networks (Zimmerer 1991;Pusadee et al 2009;Lewis 2010;Gravel et al 2011;Burnside et al 2012;Sardos et al 2012). While biogeography tends to deal with broad regions, landscape genetics is typically more focused on studying patterns and processes over areas intermediate between local and regional.…”

Section: Biogeography and Landscape Geneticsmentioning

confidence: 99%

Seed exchange networks for agrobiodiversity conservation. A review

Pautasso

Aistara²,

Barnaud

et al. 2012

Agron. Sustain. Dev.

211

149

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The circulation of seed among farmers is central to agrobiodiversity conservation and dynamics. Agrobiodiversity, the diversity of agricultural systems from genes to varieties and crop species, from farming methods to landscape composition, is part of humanity's cultural heritage. Whereas agrobiodiversity conservation has received much attention from researchers and policy makers over the last decades, the methods available to study the role of seed exchange networks in preserving crop biodiversity have only recently begun to be considered. In this overview, we present key concepts, methods, and challenges to better understand seed exchange networks so as to improve the chances that traditional crop varieties (landraces) will be preserved and used sustainably around the world. The available literature suggests that there is insufficient knowledge about the social, cultural, and methodological dimensions of environmental change, including how seed exchange networks will cope with changes in climates, socio-economic factors, and family structures that have supported seed exchange systems to date. Methods available to study the role of seed exchange networks in the preservation and adaptation of crop specific and genetic diversity range from meta-analysis to modelling, from participatory approaches to the development of bio-indicators, from genetic to biogeographical studies, from anthropological and ethnographic research to the use of network theory. We advocate a diversity of approaches, so as to foster the creation of robust and policy-relevant knowledge. Open challenges in the study of the role of seed exchange networks in biodiversity conservation include the development of methods to (i) enhance farmers' participation to decision-making in agro-ecosystems, (ii) integrate ex situ and in situ approaches, (iii) achieve interdisciplinary research collaboration between social and natural scientists, and (iv) use network analysis as a conceptual framework to bridge boundaries among researchers, farmers and policy makers, as well as other stakeholders. (Résumé d'auteur

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Section: Biogeography and Landscape Geneticsmentioning

confidence: 99%

Seed exchange networks for agrobiodiversity conservation. A review

Pautasso

Aistara²,

Barnaud

et al. 2012

Agron. Sustain. Dev.

211

149

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“…Genetic diversity studies using different molecular markers are likewise concluding that strong admixture among pearl millet varieties is predominant and definition of distinct groups is not evident (Lewis, 2010;Stich et al, 2010;Bashir et al, 2014b;Pucher et al, 2015).…”

Section: Diversity Analysis and Implications For Heterotic Groupingmentioning

confidence: 99%

Characterization of West and Central African accessions from a pearl millet reference collection for agro-morphological traits and Striga resistance

Sattler

Sanogo

Kassari

et al. 2017

Plant Genet. Resour.

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To promote the utilization of West and Central African (WCA) genetic resources of pearl millet [Pennisetum glaucum (L.) R. Br.], this study aimed at agro-morphological characterization of selected accessions from the pearl millet reference collection, established by the Generation Challenge Program and the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT). A total of 81 accessions were included, comprising 78 landraces originating from 13, predominantly WCA countries and three improved cultivars. All 81 accessions were evaluated together with 18 checks for resistance to the parasitic weed Striga hermonthica (Del.) Benth. in an artificially infested field at one location in Niger. Determined by available seed quantity, 74 accessions were characterized together with seven checks in the rainy season 2009 in field trials under low-input and fertilized conditions in Nigeria, Niger and Mali, respectively. Wide ranges were observed for various traits. Several accessions were identified as sources for specific traits of interest, i.e. long panicles, high-grain density, earliness, Striga resistance and stable yielding across environments. The observed yield inferiority of all Genebank accessions compared with checks may indicate lost adaptation or inbreeding depression due to an insufficient effective population size during multiplication. A principal component analysis revealed an immense diversity but also strong admixture among the tested accessions, i.e. there were no clearly distinct groups. The seed of all genotypes is available from ICRISAT. The online availability of the characterization data is expected to facilitate efficient use of these pearl millet accessions by breeding programmes in WCA and worldwide.

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“…Phenotypic studies could not detect any significant grouping. Genotypic studies were able to group cultivars, without a relationship between parental genetic distance and hybrid performance (Bashir et al., ; Lewis, ; Pucher et al., ; Sattler et al., ; Stich et al., , 2019). Evaluation of combining ability patterns. Results from several combining ability studies (Ouendeba et al., , Pucher et al., , Sattler et al., ) revealed that eastern WA and western WA cultivars form loose groups that combine well with each other (Dutta, ; Pucher et al., ; Sattler et al., ; Sattler et al., ). Interpool improvement.…”

Section: Launching Sustainable Pearl Millet Hybrid Breeding In West Amentioning

confidence: 99%

A unified strategy for West African pearl millet hybrid and heterotic group development

Sattler

Haussmann

2020

Crop Science

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Smallholder farmers in Sahelian West Africa (WA) grow pearl millet [Pennisetum glaucum (L.) R. Br.] as a staple cereal in harsh and highly variable environments, predominantly relying on landraces or open‐pollinated varieties (OPVs) with an average grain yield of 648 kg ha−1 (2017). Encouraging initial results with experimental pearl millet population or topcross hybrids and the available diversity in its WA center of origin offer a great opportunity for a regionally coordinated hybrid breeding approach. This review is therefore meant to summarize information on pearl millet hybrid breeding with emphasis on WA and to suggest a unified strategy as a way forward. Observed average better‐parent heterosis ranged from 4–18% and 0–88% in population and topcross hybrids, respectively, across several studies, and the yield stability was comparable with or better than the parental OPVs. Diversity and combining ability studies pointed at eastern and western WA as promising starting points for systematic development of heterotic groups. Building on respective groups, reciprocal recurrent selection in combination with integration of further adapted genetic resources is recommended to systematically diversify and build up the heterotic parental pools, increase combining ability to the opposite group, and create a continuous output of OPV and hybrid varieties. Molecular markers supporting cytoplasmic male sterility (CMS) introgression are available, and genomic tools can improve hybrid prediction. Regarding the unpredictability and intensity of biotic and abiotic stresses, heterogeneous population and topcross hybrids appear most suitable to sustainably increase pearl millet yields and give maximal benefits to WA farmers.

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Biogeography and Genetic Diversity of Pearl Millet (Pennisetum glaucum) from Sahelian Africa

Cited by 11 publications

References 62 publications

Seed exchange networks for agrobiodiversity conservation. A review

Seed exchange networks for agrobiodiversity conservation. A review

Characterization of West and Central African accessions from a pearl millet reference collection for agro-morphological traits and Striga resistance

A unified strategy for West African pearl millet hybrid and heterotic group development

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