On-farm genetic diversity of wheat (Triticum aestivum spp.) in Digalu Tijo District, Arsi zone, Ethiopia

Gelelcha, Fekadu; Kumsa, Fikadu; Kuma, Tolera

doi:10.1016/j.heliyon.2022.e12775

Cited by 3 publications

(2 citation statements)

References 22 publications

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“…The number of farmers cultivating landraces and their relative area coverage were determined. The number of landraces cultivated recently as compared to the previous number was the basis for the calculation of genetic erosion [ 15 , 47 , 48 ]. A reduction in richness (that is a reduction in the total number of crops, varieties or alleles) is a better indicator for genetic erosion, as it does recognize the dynamics in the system [ 12 ].…”

Section: Methodsmentioning

confidence: 99%

Monitoring Genetic Erosion of Aromatic and Medicinal Plant Species in Alentejo (South Portugal)

Póvoa

Lopes

Barata

et al. 2023

Plants

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The main goal of this work was to study the genetic erosion risk of plants with aromatic, medicinal and gastronomic applications in Portugal, particularly in the Alentejo region. The target species were coriander (Coriandrum sativum L.), hart’s pennyroyal (Mentha cervina L.) and pennyroyal (Mentha pulegium L.). The methodology involved direct observations and surveys (2002/2003 and 2011). The GE formula applied in Hammer’s studies was used to estimate genetic erosion. The main factors causing genetic erosion were the primary drivers of biodiversity loss: habitat loss, invasive species, and overexploitation influenced by human intervention such as the clearing of watercourses, vegetation control, grazing and desertification. The results indicate a reduction in individuals per species in Alentejo, with a net erosion loss of 11% for M. pulegium, 32% for M. cervina and 33% for C. sativum. The overall loss of accessions (genetic erosion risk) was higher in cultivated accessions (33%) than in wild accessions (11%), with an annual genetic erosion rate of 3.7% and 1.2%, respectively. The annual risk of genetic erosion for M. pulegium accessions collected in a natural habitat was 0.6%, which is much lower than the 3.7% for M. cervina. These results consolidate the importance of collecting and conserving genetic resources.

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Section: Methodsmentioning

confidence: 99%

Monitoring Genetic Erosion of Aromatic and Medicinal Plant Species in Alentejo (South Portugal)

Póvoa

Lopes

Barata

et al. 2023

Plants

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“…In search of neglected agricultural species and populations, of particular interest are locations of exceptional agrobiodiversity where, over many generations, farming practices, in interaction with abiotic and biotic conditions created hotspots of diversity combined with the interaction with both abiotic and biotic conditions, have created hotspots of diversity [19]. On the other hand, genetic erosion is rapidly advancing [20], particularly in the developed world, including many European regions. One of the main means of resistance is the high number of gene banks [21].…”

Section: Introductionmentioning

confidence: 99%

Hilly, Semi-Mountainous and Mountainous Areas Harbor Landraces Diversity: The Case of Messinia (Peloponnese-Greece)

Thanopoulos,

Drossinou,

Koutroumpelas

et al. 2024

Diversity

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Landraces are identified for their genetic diversity and heritage value. Geographically isolated areas are gradually recognized for their agricultural diversity and importance in conservation. One of the consequences of agricultural intensification is an increase in crop uniformity and hence a reduction in the landraces’ genetic resources. Messinia, located in Southwest Peloponnese, Greece, is characterized by a diverse terrain and smallholdings. The geomorphological character of the area and farmers’ selections have led to new landraces (local varieties) with unique traits and specific adaptations. A total of 110 villages/settlements were visited between 2013–2016, aiming to explore the existing wealth of landraces and the degree of genetic erosion. The genetic material collected and the testimonies extracted from local communities were compared to data from past expeditions, gene banks, and portal databases. Of the 427 collected samples, the majority belonged to annual vegetable or pulse species, indicating the genetic diversity of the groups, which was likely related to their culinary value. Perennial crops are priced both as commercial and staple crops, with olive trees dominating the agricultural landscape. Genetic erosion and production decline were noticed for cereals. It is concluded that socio-cultural and agricultural trends have a strong influence on the survival of landraces. Without exhausting the agricultural wealth of the region, the present study suggests that Messinia is an agrobiodiversity hotspot that includes neglected crops.

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Evaluating agromorphological traits of Greek wheat landraces and exploring their potential for bread and pasta making based on seed physical properties

Protonotariou,

Thanopoulos,

Katsileros

et al. 2023

GenResJ

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Physical and morphological characteristics of Greek wheat landrace and cultivar seeds were evaluated, aiming to assess their bread- and pasta-making quality. Furthermore, the plant agromorphological traits of wheat landraces and cultivars were measured and correlated with seed physical properties. Fifteen Triticum spp. accessions, out of which four cultivars (two Triticum aestivum and two T. durum), nine landraces (two T. durum, five T. aestivum, one T. dicoccum and one T. polonicum) and two T. durum of unknown status were studied. Seventeen morphological plant and seed traits were measured based on UPOV descriptors. Ear emergence was earlier in cultivars than in landraces. The plant weight of the landraces was, in some cases, almost twice the cultivars’. Seed firmness (62.96–194.85N) was positively correlated with thousand kernel weight and volume (0.840 and 0.791, P < 0.05, respectively). Based on the agromorphological traits, cluster analysis clearly separated the species and the cultivars from the landraces, and the unknown status accessions were grouped with the cultivars. Cluster analysis with all measured traits set the wheat accessions in the following distinct groups: (1) T. durum cultivars including the unknown status accessions, (2) T. aestivum cultivars, and (3) T. aestivum and T. durum landraces. T. polonicum and T. dicoccum each formed a separate group. Seed physical properties of the analyzed Greek landraces indicated their suitability for bread and/or pasta making.

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On-farm genetic diversity of wheat (Triticum aestivum spp.) in Digalu Tijo District, Arsi zone, Ethiopia

Cited by 3 publications

References 22 publications

Monitoring Genetic Erosion of Aromatic and Medicinal Plant Species in Alentejo (South Portugal)

Monitoring Genetic Erosion of Aromatic and Medicinal Plant Species in Alentejo (South Portugal)

Hilly, Semi-Mountainous and Mountainous Areas Harbor Landraces Diversity: The Case of Messinia (Peloponnese-Greece)

Evaluating agromorphological traits of Greek wheat landraces and exploring their potential for bread and pasta making based on seed physical properties

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