Diversité génétique de quelques populations naturelles de Medicago ciliaris (L) Krock et de Medicago intertexta (L) Mill. I. Analyse de la variabilité morphologique

Chérifi, Khalil; Boussaïd, Marwa; Marrakchi, M.

doi:10.1051/agro:19931004

Cited by 8 publications

(6 citation statements)

References 5 publications

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“…This intra-specific variation in salinity tolerance in the two species, also reported in (Chérifi et al, 1993;Ibrar and Hussein, 9 2003;Rabhi et al, 2007;Nichols et al, 2009), may be used to select genotypes particularly suitable for cultivation on lands relatively affected by salinity; all the more since M. ciliaris and M. polymorpha are predominantly autogamous (Chérifi et al, 1993;Mizukami et al, 2006).…”

Section: Effect Of Salinity On Seed Germinationsupporting

confidence: 57%

Diversity of Salt Tolerance During Germination in Medicago ciliaris (L.) and Medicago polymorpha (L.)

Chérifi

Boufous

Mousadik

2017

AJBP

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Variability of salt tolerance in eight wild populations of two annual Medicago species (Medicago ciliaris and Medicago polymorpha) was evaluated at germination stage using tree treatments of salinity: 50, 100 and 150 mM of NaCl. Results showed that germination is clearly affected by high salt stress; their germination rate doesn’t exceed 7% at 150 mM. The greatest variability in tolerance was observed at moderate salt stress (50 mM of NaCl) and the decrease in germination seems to be more accentuated in Medicago polymorpha than Medicago ciliaris. Whereas, the Tunisian population of Medicago ciliaris was the best tolerant in all ecotypes studied in this work. This population prospected on soils affected by salinity, exhibits a particular adaptability to salt environment, at least at this stage in the life cycle. This intra-specific variation in salt tolerance may be used to select genotypes particularly suitable for cultivation on lands relatively affected by salinity. On the other hand, when ungerminated seeds from NaCl treatments were transferred to distilled water, they recovered largely their germination at all the populations studied after only 2 days. This, indicate that the germination inhibition was related to osmotic stress rather than ion toxicity. In addition, seed germination in all populations tended to be extremely rapid than that observed in distilled water which indicate that this pretreatment raises dormancy.

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Section: Effect Of Salinity On Seed Germinationsupporting

confidence: 57%

Diversity of Salt Tolerance During Germination in Medicago ciliaris (L.) and Medicago polymorpha (L.)

Chérifi

Boufous

Mousadik

2017

AJBP

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“…Nevertheless, an important variability within and between Tunisian populations of M. ciliaris was found by Cherifi et al (1993) in studying four populations of M. ciliaris using 20 morphological characters related to vegetative and reproductive stage and for Badri et al (2008) who analyzed the genetic variability of four populations of M. ciliaris using 19 quantitative traits and 12 SSR markers. The latter found high levels of genetic diversity at quantitative trait and microsatellite loci occurred within populations.…”

Section: Introductionmentioning

confidence: 99%

Pheno-morphological variation, genetic diversity and population structure of Tunisian Echinus Medic (Medicago ciliaris L.)

et al. 2016

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ABSTRACT. Medicago ciliaris L., considered as a valuable genetic resource, is a good candidate for the improvement of marginal or degraded lands with low fertility or high salinity. In this study, the phenomorphological and genetic diversity were investigated in 14 Tunisian populations of M. ciliaris for the first time. Fourteen morphological traits showed significant differentiation between populations and high levels of diversity. Two amplified fragment length polymorphism primer combinations (E-AGC/M-CAA; E-AAG/M-CTG) were analyzed using an automated capillary electrophoresis system. A total of 528 loci were 2 C. Jabri et al.Genetics and Molecular Research 15 (3): gmr.15038595 generated, of which 54% were polymorphic. Allelic polymorphism ranged from 0.02 to 0.5. Significant variation between populations was found for gene diversity, mean number of alleles per locus and Shannon index for which mean values were 0.17, 0.26, and 1.57, respectively. Analysis of molecular variance revealed a high rate of genetic variation within populations. Principal component analysis and genotypic clustering discriminated M. ciliaris populations according to their geographical origin. M. ciliaris clustered into three main groups. The first group was associated with high inland and cold areas, the second was defined by low areas with mild winters while the third described low coastal areas. Similarity of morphological and molecular results indicated that either markers could be used for the study of genetic diversity in this species.

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“…Les études de diversité des plantes cultivées ont montré que les variétés traditionnelles, bien que moins productives, sont génétiquement plus diversifiées que les variétés améliorées (Brown et Munday, 1982 ;Ahmadi et al, 1988). Par ailleurs, la sauvegarde de ces variétés traditionnelles contribue au maintien de leur richesse génétique (Frankel et al, 1995) et permet de conserver le potentiel nécesaire pour faire face à de nouveaux impératifs (Cherifi et al, 1993). Pour éviter une disparition considérée comme une catastrophe biologique, de nombreuses accessions de variétés traditionnelles ont été récoltées et conservées dans des banques de gènes (Harlan, 1975;Frankel et al, 1995;Cruz, 2004).…”

Section: Introductionunclassified

Diversité agro-morphologique des accessions de fonio [<i>Digitaria exilis</i> (Kippist.) Stapf.] au Niger

Saidou¹,

Bakasso²,

Inoussa³

et al. 2015

Int. J. Bio. Chem. Sci

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La variablité morphologique de 67 accessions de fonio [Digitaria exilis (Kippist.) Stapf.] collectées au Niger a été évaluée au cours de deux années (2011 et 2012). Seize (16) caractères agro morphologiques (dont 14 caractères quantitatifs et 2 caractères qualitatifs) ont été évalués en station dans deux zones agroécologiques différentes (Tarna en zone sahélo-saharienne et Tara en zone soudanienne). La classification acsendante hierarchique (CAH) et l'analyse factorielle discriminante (AFD) ont mis en évidence quatre groupes (GI, GII, GIII et GIV). Les accessions du groupe GIV ont en moyenne un cycle de maturité compris entre 85 et 90 jours tandis que les autres groupes présentent un cycle de maturité superieur à 90 jours dans nos conditions expérimentales. Les résultats montrent que les variables les plus discriminantes qui permettent de décrire la variabilité entre les groupes identifiés sont la biomasse sèche (tige et feuille) par hectare, la longueur des entrenoeuds, le rendement en graine par hectare et dans une certaine mesure le cycle de la plante. L'observation des caractères qualitatifs a montré que cinq accessions (représentant 7% du total) ont des graines non decortiquées de couleur rouge et quatre accessions (6% du total), une tige de couleur rouge. Les caractères analysés peuvent ainsi constituer des critères de base pour différencier les accessions des autres régions de l'Afrique de l'Ouest et servir pour une étude de variabilité entre les restes des accessions de fonio collectées au Niger. Des possiblités d'amélioration peuvent également être envisagées une fois que le regime de réproduction de l'espèce est bien identifié.

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Diversité génétique de quelques populations naturelles de Medicago ciliaris (L) Krock et de Medicago intertexta (L) Mill. I. Analyse de la variabilité morphologique

Cited by 8 publications

References 5 publications

Diversity of Salt Tolerance During Germination in Medicago ciliaris (L.) and Medicago polymorpha (L.)

Diversity of Salt Tolerance During Germination in Medicago ciliaris (L.) and Medicago polymorpha (L.)

Pheno-morphological variation, genetic diversity and population structure of Tunisian Echinus Medic (Medicago ciliaris L.)

Diversité agro-morphologique des accessions de fonio [<i>Digitaria exilis</i> (Kippist.) Stapf.] au Niger

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