Evaluation of populations of Dactylis glomerata L. native to Mediterranean environments

Several morphological and agronomic traits and the genetic diversity of nine Dactylis glomerata L. populations collected throughout Sicily (semi-arid Mediterranean environment) were evaluated for two successive years. Significant differences were recorded for morphological traits (plant height, leaf length, leaf width). In relation to the measurement of summer dormancy, the results suggest the expression of different levels of dormancy (completely dormant, semi-dormant, and non-dormant). For biomass yield, some Sicilian populations (SD63 and SD56) characterised by low levels of summer dormancy show production levels similar to the summer-active control varieties (Medly and Porto). However, SD46, with a much higher level of dormancy, gave biomass yield higher than the summer-dormant control variety (Kasbah). The genetic diversity evaluated by fAFLP analysis confirms the observed morphological and agronomic variability.

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STUDY OF REPRODUCTIVE FEATURES AND AGE STRUCTURE OF DACTYLIS GLOMERATA L. CENOPOPULATION IN DIFFERENT ECOLOGICAL CONDITIONS

Bulletin of Udmurt University. Series Biology. Earth Sciences ◽

10.35634/2412-9518-2021-31-1-111-115 ◽

2021 ◽

Vol 31 (1) ◽

pp. 111-115

Author(s):

N.R. Veselkova

Keyword(s):

Age Structure ◽

Humus Content ◽

Initial Period ◽

Dactylis Glomerata ◽

Culture Method ◽

Field Studies ◽

Leaf Length ◽

Udmurt Republic ◽

Dactylis Glomerata L ◽

The Village

The objective of the research was to identify the reproductive characteristics and age structure of cenopopulation of valuable forage cereal in different environmental conditions. Field studies were carried out in the vicinity of the village of Kvarsa in the Votkinsk region of the Udmurt Republic in 2017-2018. Soil samples were taken from each biotope and analyzed for pH and humus content. In cenopopulations of the Dactylis glomerata, the age states of partial bushes were determined of the test plots. Collected caryopses were germinated by the roll culture method in different solutions (0.001 % gibberellin, 0.5 % ammonium nitrate). The maximum indicators of seed germination, root and leaf length of seedlings in the initial period of growth were found for caryopses collected from plants from roadside habitats, which can be considered as adaptation of plants to conditions of significant anthropogenic transformation of the ecotope.

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Genetic diversity and structure of natural Dactylis glomerata L. populations revealed by morphological and microsatellite-based (SSR/ISSR) markers

Genetics and Molecular Research ◽

10.4238/2014.june.9.8 ◽

2014 ◽

Vol 13 (2) ◽

pp. 4226-4240 ◽

Cited By ~ 10

Author(s):

P. Madesis ◽

E.M. Abraham ◽

A. Kalivas ◽

Ι. Ganopoulos ◽

A. Tsaftaris

Keyword(s):

Genetic Diversity ◽

Dactylis Glomerata ◽

Issr Markers ◽

Genetic Diversity And Structure ◽

Dactylis Glomerata L

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Comparing the efficiency of sampling strategies to establish a representative in the phenotypic-based genetic diversity core collection of orchardgrass (Dactylis glomerata L.)

Czech Journal of Genetics and Plant Breeding ◽

10.17221/9/2012-cjgpb ◽

2013 ◽

Vol 49 (No. 1) ◽

pp. 36-47 ◽

Cited By ~ 4

Author(s):

M. Studnicki ◽

W. Mądry ◽

J. Schmidt

Keyword(s):

Genetic Diversity ◽

Core Collection ◽

Dactylis Glomerata ◽

Sampling Strategy ◽

Sampling Strategies ◽

Core Collections ◽

The Core ◽

Entire Collection ◽

The Mean ◽

Dactylis Glomerata L

Establishing a core collection that represents the genetic diversity of the entire collection with a minimum loss of its original diversity and minimal redundancies is an important problem for gene bank curators and crop breeders. In this paper, we assess the representativeness of the original genetic diversity in core collections consisting of one-tenth of the entire collection obtained according to 23 sampling strategies. The study was performed using the Polish orchardgrass Dactylis glomerata L. germplasm collection as a model. The representativeness of the core collections was validated by the difference of means (MD%) and difference of mean squared Euclidean distance (d‒D%) for the studied traits in the core subsets and the entire collection. In this way, we compared the efficiency of a simple random and 22 (20 cluster-based and 2 direct cluster-based) stratified sampling strategies. Each cluster-based stratified sampling strategy is a combination of 2 clusterings, 5 allocations and 2 methods of sampling in a group. We used the accession genotypic predicted values for 8 quantitative traits tested in field trials. A sampling strategy is considered more effective for establishing core collections if the means of the traits in a core are maintained at the same level as the means in the entire collection (i.e., the mean of MD% in the simulated samples is close to zero) and, simultaneously, when the overall variation in a core collection is greater than in the entire collection (i.e., the mean of d‒D% in the simulated samples is greater than that obtained for the simple random sampling strategy). Both cluster analyses (unweighted pair group method with arithmetic mean UPGMA and Ward) were similarly useful in constructing those sampling strategies capable of establishing representative core collections. Among the allocation methods that are relatively most useful for constructing efficient samplings were proportional and D2 (including variation). Within the Ward clusters, the random sampling was better than the cluster-based sampling, but not within the UPGMA clusters.

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