Cytotaxonomic investigation and meiotic behavior of natural populations of genus Avena in Algeria

Aissat, Assia; Amirouche, Rachid; Amirouche, Nabila

doi:10.1007/s10681-019-2490-6

Cited by 3 publications

(2 citation statements)

References 44 publications

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“…The genus Saccharum is well-known for its exclusively higher-order polyploid species, such as S. officinarum, S. robustum and S. spontaneum, the latter two with variable chromosome numbers or cytotypes. In this study, we confirmed that S. officinarum exhibits a relatively low number of meiotic abnormalities (~6%), i.e., regular meiosis, similar to that of other polyploids in the grass family (Leofanti et al 2017;Aissat et al 2019;Risso-Pascotto et al 2003). In contrast to our findings, these studies report abnormalities higher than 30%.…”

Section: Discussionsupporting

confidence: 81%

Meiotic abnormalities in sugarcane (Saccharum spp.): Evidence for peri- and paracentric inversions

Oliveira

Soares

Costa

et al. 2022

Preprint

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The modern cultivars of sugarcane (Saccharum spp.) are highly polyploid and accumulate aneuploidies due to their history of domestication, genetic improvement and interspecific hybrid origin involving the domesticated sweet species S. officinarum ('noble cane') and the wild S. spontaneum, both with an evolutionary history of polyploidy. The first hybrids were backcrossed with S. officinarum, and selection from progenies in subsequent generations established the genetic basis of modern cultivars. Saccharum genome complexity has inspired several molecular studies that have elucidated aspects of sugarcane genome constitution, architecture and cytogenetics. Herein, we conducted a comparative analysis of the meiotic behavior of representatives of the parentals S. officinarum and S. spontaneum, and the commercial variety, SP80-3280. S. officinarum, an octoploid species, exhibited regular meiotic behavior. In contrast, S. spontaneum and SP80-3280 exhibited several abnormalities from metaphase I to the end of division. We reported and typified, for the first time, the occurrence of peri- and paracentric inversions. Using in-situ hybridization techniques, we were able to determine how pairing association occurred at diakinesis and, in particular, the chromosome composition of SP80-3280. Our findings have implications for sugarcane genetic mapping, genomics, and for studies on resynthesized polyploids.

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Section: Discussionsupporting

confidence: 81%

Meiotic abnormalities in sugarcane (Saccharum spp.): Evidence for peri- and paracentric inversions

Oliveira

Soares

Costa

et al. 2022

Preprint

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“…In Brachiaria brizantha , a grass of African origin, high levels of meiotic abnormalities were found, and are normally present in odd polyploids, compromising pollen viability and inducing asexual reproduction, for example, apomixis (Risso‐Pascotto et al, 2003). In the genus Avena , cytogenetic and geographical combined data of diploids and polyploids has shown that the frequencies of multivalent associations and laggards have been influenced by local environmental stress conditions within natural populations (Aissat et al, 2019). On the other hand, S. officinarum is a well‐adapted, perennial species whose evolutionary trajectory of diploidisation forms the most prevalent bivalents.…”

Section: Discussionmentioning

confidence: 99%

Meiotic abnormalities in sugarcane (Saccharum spp.) and parental species: Evidence for peri‐ and paracentric inversions

Oliveira

Soares

Costa

et al. 2023

Annals of Applied Biology

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The modern cultivars of sugarcane (Saccharum spp.) are highly polyploid and accumulate aneuploidies due to their history of domestication, genetic improvement and interspecific hybrid origin involving the domesticated sweet species Saccharum officinarum (‘noble cane’) and the wild Saccharum spontaneum, both with an evolutionary history of polyploidy. The first hybrids were backcrossed with S. officinarum, and selection from progenies in subsequent generations established the genetic basis of modern cultivars. Saccharum genome complexity has inspired several molecular studies that have elucidated aspects of sugarcane genome constitution, architecture and cytogenetics. Herein, we conducted a comparative analysis of the meiotic behaviour of representatives of the parentals S. officinarum and S. spontaneum, and the commercial variety, SP80‐3280. S. officinarum, an octoploid species, exhibited regular meiotic behaviour. In contrast, S. spontaneum and SP80‐3280 exhibited several abnormalities from metaphase I to the end of division. We reported and typified, for the first time, the occurrence of peri‐ and paracentric inversions. Using in‐situ hybridisation techniques, we were able to determine how pairing association occurred at diakinesis, the origin of lagging chromosomes and, in particular, the mitotic chromosome composition of SP80‐3280. Interestingly, S. spontaneum and recombinant chromosomes showed the most marked tendency to produce laggards in both divisions. Future attempts to advance knowledge on sugarcane genetics and genomics should take meiotic chromosome behaviour information into account.

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Genetic Diversity and Population Structure of Algerian Endemic Plant Species Avena macrostachya Bal. ex Cross. et Durieu

et al. 2020

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Avena macrostachya is still a relatively unknown species. Using sequence-related amplified polymorphism (SRAP) markers, a simple and inexpensive technique, allowed us to conduct experiments on genetic differentiation and to study the population structure of this Algerian endemic oat. The results obtained showed lower than expected genetic diversity within the A. macrostachya species. The cause may be endemism of the species as well as genetic drift possible during collection, and maintenance of the accessions in gene bank and seed reproduction. No clear genetic structure was found in the examined collection, which indicates a close relationship between the populations collected in the Djurdjura National Park in Algeria. Considering the endemism of the species, its breeding potential and the small-scale ex situ collection, careful monitoring of natural sites and repeating of the collection mission are, therefore, absolutely crucial.

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Cytotaxonomic investigation and meiotic behavior of natural populations of genus Avena in Algeria

Cited by 3 publications

References 44 publications

Meiotic abnormalities in sugarcane (Saccharum spp.): Evidence for peri- and paracentric inversions

Meiotic abnormalities in sugarcane (Saccharum spp.): Evidence for peri- and paracentric inversions

Meiotic abnormalities in sugarcane (Saccharum spp.) and parental species: Evidence for peri‐ and paracentric inversions

Genetic Diversity and Population Structure of Algerian Endemic Plant Species Avena macrostachya Bal. ex Cross. et Durieu

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