Reproductive biology, phenology, pollen viability and germinability in Kersting's groundnut (Macrotyloma geocarpum (Harms) Maréchal &amp; Baudet, Fabaceae)

Kafoutchoni, Konoutan Médard; Agoyi, Eric Etchikinto; Dassou, Gbèwonmèdéa Hospice; Sossou, Hospice Samson; Ayi, Sergino; Glèlè, Corneille Ahanhanzo; Adomou, Aristide Cossi; Yédomonhan, Hounnankpon; Agbangla, Clément; Assogbadjo, Achille Ephrem

doi:10.1016/j.sajb.2020.11.015

Cited by 8 publications

(5 citation statements)

References 52 publications

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“…Moreover, there was a high predominance of homozygous individuals indicating that Kersting's groundnut is primarily a selfing crop just like horsegram (Macrotyloma uniflorum) its closely related species [56,57]. In fact, Kersting's groundnut bears 'pre-anthesis cleistogamous' flowers in which pollination and fertilisation occur in closed flower buds [58], leading to very high levels of homozygosity as reflected here by the low observed heterozygosity among populations and morphotypes (Tables 2 and 3). Therefore, induced mutagenesis seems to be the most promising way to broaden the genetic base of Kersting's groundnut.…”

Section: Genetic Diversity Across Populations and Morphotypesmentioning

confidence: 85%

Genetic Diversity and Population Structure in a Regional Collection of Kersting’s Groundnut (<em>Macrotyloma geocarpum </em>(Harms) Maréchal & Baudet)

Kafoutchoni

Agoyi

Agbahoungba

et al. 2020

Preprint

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Kersting’s groundnut is an important source of protein and essential nutrients that contribute to food security in West Africa. However, the crop is still underexploited by the populations and under-researched by the scientific community. This study aimed to investigate the genetic diversity and population structure of 217 Kersting’s groundnut accessions from five origins using 886 DArTseq markers. Gene diversity was low and ranged from 0.049 to 0.064. The number of private alleles greatly varied among populations (42–192) and morphotypes (40–339). Moderate to very high levels of selfing and inbreeding were observed among populations (s=56–85%, FIS=0.389–0.736) and morphotypes (s=57–82%, FIS=0.400–0.691). Moreover, little to very high genetic differentiations were observed among populations (0.006≤FIS≤0.371) and morphotypes (0.029≤FIS≤0.307). Analysis of molecular variance partitioned 38.5% of the genetic variation among and 48.7% within populations (P<0.001). Significant isolations by distance were detected between populations (R2=0.612, P=0.011) and accessions (R2=0.499, P<0.001). Discriminant analysis of principal components and neighbour joining consistently distinguished eight distinct clusters. These data provide a global picture of the existing genetic diversity for Kersting’s groundnut and will guide the choice of breeding strategies to increase production.

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Section: Genetic Diversity Across Populations and Morphotypesmentioning

confidence: 85%

Genetic Diversity and Population Structure in a Regional Collection of Kersting’s Groundnut (<em>Macrotyloma geocarpum </em>(Harms) Maréchal & Baudet)

Kafoutchoni

Agoyi

Agbahoungba

et al. 2020

Preprint

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“…Recent development in M. geocarpum suggested challenges in hybridization in the species (Kafoutchoni et al, 2021), a situation that locks genetic variation creation. Such a bottleneck calls for the necessity to explore alternative diversity generation approaches such as mutation breeding by using physical and chemical mutagens.…”

Section: Breeding Implicationmentioning

confidence: 99%

Determinants of farmers’ willingness to pay for improved cultivars of Macrotyloma geocarpum (harms) Maréchal and Baudet in Benin and Togo

Agossou,

N’Danikou,

Fassinou Hotègni

et al. 2023

Front. Sustain. Food Syst.

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IntroductionQuality seed is essential to satisfy food demand. This is also true for neglected crops especially those that are economically valuable such as Kersting’s groundnut (Macrotyloma geocarpum), which holds the potential to improve farmers’ livelihoods. In this study, we assessed the attributes that drove Kersting groundnut farmers’ willingness to pay for improved seeds.MethodsA total of 567 respondents were selected in the Northern Guinea and Southern Sudanian production zones in Benin and Togo using chain referral sampling, and they were then interviewed with a semi-structured questionnaire. Classification and regression trees, Ordinary Least Squared, and Tobit regression were combined to assess the relationship between the socio-demographic variables and farmers’ Willingness to Pay (WTP) and Amount they are Willing to Pay (AWTP).Results and discussionResults suggested that more than 90% of respondents involved in the production of Macrotyloma geocarpum were willing to access its improved seeds, including those who had already abandoned the cultivation of this crop due to constraints such as the very low seed yield of current cultivars, the difficulty to access seeds, and the cultivation practices. The factors which affected the amount farmers are willing to pay included the following: the low yield of current cultivars used by farmers, the expected yield of the improved variety, which should be higher than 1 ton per ha (1 t.ha−1), the socio-linguistic group affiliation, and the adoption level of improved agricultural technologies. The average amount fixed by seed companies that farmers were willing to pay for 1 kg of the improved seed was USD 5.35 but they have freely proposed to pay the average amount of USD 4.63 to access 1 kg of improved seed. The white-seeded cultivar was the most appreciated by farmers and was the most cultivated in the Northern Guinean Zone whereas the cultivation of the colored-seeded (e.g., black-seeded) cultivars was mainly noted in the Southern Sudanian Zone. Furthermore, the respondents indicated seed yield improvement and disease management as their main research needs to help increase the production of the crop. The findings of this research will help refine Macrotyloma geocarpum improvement programs to release farmer-needed varieties.

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“…Amuti (1980) gave the first description of KG floral biology and deduced from their observations that the crop is a selfpollinated plant with white or purple flowers. Obasi and Ezedinma (1994) focused on floral biology while Kafoutchoni et al (2021b) went further to study the floral and fruiting phenology, stigma receptivity, pollen viability, and germinability, to devise insights to designing hybridization protocol that guarantees maximum success in the development of breeding lines. Similar research efforts in pigeon pea, which previously had a low success of artificial hybridization (Kalve and Tadege, 2017), has led to the development of hybrid varieties with 25-69% yield superiority over the local cultivars in India (Saxena, 2015).…”

Section: Overcoming the Cross-pollination Challenges In Kg Surveying The Pollination Systemmentioning

confidence: 99%

“…On the other hand, bud pollination occurs after anthesis in chasmogamous species, which may allow a relatively low rate of allogamy. Based on the changes observed in flower color and size, Kafoutchoni et al (2021b) described six floral phenological stages followed by six fruiting stages for KG, viz initiated flower (S1), young bud (S2), developed bud (S3), mature bud (S4), opened flower (S5), and wilted flower (S6) for flower development and beginning peg (F1), beginning pod (F2), full pod (F3), beginning seed (F4), full seed (F5), and mature seed (F6) for pod development.…”

Section: Overcoming the Cross-pollination Challenges In Kg Surveying The Pollination Systemmentioning

confidence: 99%

Profiling Cultivars Development in Kersting's Groundnut [Macrotyloma geocarpum (Harms) Maréchal and Baudet] for Improved Yield, Higher Nutrient Content, and Adaptation to Current and Future Climates

Coulibaly

Bodjrenou

Akohoue

et al. 2022

Front. Sustain. Food Syst.

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Kersting's groundnut [Macrotyloma geocarpum (Harms.) Maréchal and Baudet], Fabaceae, is an important source of protein and essential amino acids. As a grain legume species, it also contributes to improving soil fertility through symbiotic nitrogen fixation. However, the crop is characterized by a relatively low yield (≤500 kg/ha), and limited progress has been made so far, toward the development of high-yielding cultivars that can enhance and sustain its productivity. Recently, there was an increased interest in alleviating the burdens related to Kersting's groundnut (KG) cultivation through the development of improved varieties. Preliminary investigations assembled germplasms from various producing countries. In-depth ethnobotanical studies and insightful investigation on the reproductive biology of the species were undertaken alongside morphological, biochemical, and molecular characterizations. Those studies revealed a narrow genetic base for KG. In addition, the self-pollinating nature of its flowers prevents cross-hybridization and represents a major barrier limiting the broadening of the genetic basis. Therefore, the development of a research pipeline to address the bottlenecks specific to KG is a prerequisite for the successful expansion of the crop. In this paper, we offer an overview of the current state of research on KG and pinpoint the knowledge gaps; we defined and discussed the main steps of breeding for KG' cultivars development; this included (i) developing an integrated genebank, inclusive germplasm, and seed system management; (ii) assessing end-users preferences and possibility for industrial exploitation of the crop; (iii) identifying biotic and abiotic stressors and the genetic control of responsive traits to those factors; (iv) overcoming the cross-pollination challenges in KG to propel the development of hybrids; (v) developing new approaches to create variability and setting adequate cultivars and breeding approaches; (vi) karyotyping and draft genome analysis to accelerate cultivars development and increase genetic gains; and (vii) evaluating the adaptability and stability of cultivars across various ecological regions.

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Reproductive biology, phenology, pollen viability and germinability in Kersting's groundnut (Macrotyloma geocarpum (Harms) Maréchal & Baudet, Fabaceae)

Cited by 8 publications

References 52 publications

Genetic Diversity and Population Structure in a Regional Collection of Kersting’s Groundnut (<em>Macrotyloma geocarpum </em>(Harms) Maréchal & Baudet)

Genetic Diversity and Population Structure in a Regional Collection of Kersting’s Groundnut (<em>Macrotyloma geocarpum </em>(Harms) Maréchal & Baudet)

Determinants of farmers’ willingness to pay for improved cultivars of Macrotyloma geocarpum (harms) Maréchal and Baudet in Benin and Togo

Profiling Cultivars Development in Kersting's Groundnut [Macrotyloma geocarpum (Harms) Maréchal and Baudet] for Improved Yield, Higher Nutrient Content, and Adaptation to Current and Future Climates

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