Relaţia dintre distanţa genetică şi distanţa geografică la unele populaţii de Orobanche cumana Wallr. din Republica Moldova

  • Steliana CLAPCO Universitatea de Stat “Dimitrie Cantemir”, Republica Moldova
  • Rodica MARTEA Universitatea de Stat “Dimitrie Cantemir”, Republica Moldova
  • Maria DUCA Universitatea de Stat “Dimitrie Cantemir”, Republica Moldova

Abstract

The paper presents the results of the analysis of relationship between genetic distance and geographical distance in different broomrape populations (Orobanche cumana) - a rhizopathogen specific for sunflower that essentially affects the production of this important oil crop. Thirty-nine broomrape populations collected from different regions of the Republic of Moldova and belonging to different races (≤ E, F, G and H) have been included in the study. Correlative analysis of the data with reference to the genetic distance calculated based on the results of fingerprinting with SSR (Simple Sequence Repeats) and ISSR (Inter Simple Sequence Repeats) markers and to the geographical distance suggested that no correlation exists between these two parameters. The matrix of genetic distances was used as input for a principal coordinate analysis (PCoA). The PCoA revealed a more clear grouping of populations from the same region in the case of ISSR analysis, the main part of populations from central and southern part of the country being grouped into two clusters, regardless of their race.


Key words: Broomrape; Genetic distance; Geographic distance; SSR markers; ISSR markers.


Rezumat. Lucrarea prezintă rezultatele unui studiu destinat analizei relaţiei dintre distanţa genetică şi distanţa geografică la diverse populaţii de lupoaie (Orobanche cumana) – un rizopatogen specific culturii de floarea-soarelui, care afectează esenţial producţia acestei plante oleaginoase importante. Invesitigaţia a inclus 39 de populaţii de lupoaie provenite din diverse regiuni ale Republicii Moldova şi aparţinând diferitor rase (≤ E, F, G şi H). Analiza corelativă a datelor cu referire la distanţa genetică calculată în baza rezultatelor amprentării cu markeri SSR (Simple Sequence Repeats) şi ISSR (Inter Simple Sequence Repeats) şi a distanţei geografice a pus în evidenţă absenţa corelaţiilor semnificative dintre aceşti doi parametri. Analiza coordonatelor principale (PCoA), realizată în baza matricei distanţelor genetice, a relevat o grupare mai certă a populaţiilor din aceeaşi regiune în cazul analizei cu markeri ISSR, populaţiile provenite din partea centrală şi de sud a ţării, cu unele excepţii, fiind grupate în două clustere distincte, indiferent de apartenenţa rasială.


Cuvinte-cheie: Lupoaie; Distanţă genetică; Distanţă geografică; Marcheri SSR; Marcheri ISSR.

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Published
2020-08-09
How to Cite
CLAPCO, Steliana; MARTEA, Rodica; DUCA, Maria. Relaţia dintre distanţa genetică şi distanţa geografică la unele populaţii de Orobanche cumana Wallr. din Republica Moldova. Stiinta agricola, [S.l.], n. 1, p. 73-80, aug. 2020. ISSN 2587-3202. Available at: <https://sa.uasm.md/index.php?journal=sa&page=article&op=view&path%5B%5D=692>. Date accessed: 05 dec. 2020.
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