Limits...
Mapping QTL associated with Verticillium dahliae resistance in the cultivated strawberry (Fragaria × ananassa).

Antanaviciute L, Šurbanovski N, Harrison N, McLeary KJ, Simpson DW, Wilson F, Sargent DJ, Harrison RJ - Hortic Res (2015)

Bottom Line: Average wilt scores were significantly associated with multiple QTL, which were mostly significant across all years.A clear and statistically significant relationship was observed between resistant, tolerant and susceptible material and the total number of markers present in the different resistance classes.These markers are abundant in the cultivated strawberry germplasm indicating that, despite the large number of markers, clear genetic gain is possible through marker-assisted breeding.

View Article: PubMed Central - PubMed

Affiliation: East Malling Research, New Road, East Malling , Kent ME19 6BJ, UK.

ABSTRACT
A biparental cross of octoploid strawberry segregating for resistance to Verticillium dahliae, the causative agent of Verticillium wilt, was screened under field conditions for three seasons. Average wilt scores were significantly associated with multiple QTL, which were mostly significant across all years. Markers significantly associated with the traits were used to screen material with known wilt resistance and susceptibility phenotypes. A clear and statistically significant relationship was observed between resistant, tolerant and susceptible material and the total number of markers present in the different resistance classes. In field situations resistance QTL appear to behave in an additive manner. These markers are abundant in the cultivated strawberry germplasm indicating that, despite the large number of markers, clear genetic gain is possible through marker-assisted breeding.

No MeSH data available.


Combined map of ‘Redgauntlet’ × ‘Hapil’, depicting the position of Verticillium dahliae resistance QTL. Markers with a significance level of P<0.005 are highlighted in boxes, with p values between P<0.005 and P<0.05 shown as whiskers. Red boxes are QTL from ‘Redgauntlet’, blue boxes are QTL from ‘Hapil’ and pink are QTL found in both cultivars.
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fig5: Combined map of ‘Redgauntlet’ × ‘Hapil’, depicting the position of Verticillium dahliae resistance QTL. Markers with a significance level of P<0.005 are highlighted in boxes, with p values between P<0.005 and P<0.05 shown as whiskers. Red boxes are QTL from ‘Redgauntlet’, blue boxes are QTL from ‘Hapil’ and pink are QTL found in both cultivars.

Mentions: Using data from the three years, QTL were mapped treating each year separately, using KW testing. Resistance was detected at seven loci across all three years, with a further locus significant in two out of three years and three loci highly significant but only in a single year (Table 2 and Figure 5). This led to a total of 11 QTL loci that were identified in at least one year of analysis.


Mapping QTL associated with Verticillium dahliae resistance in the cultivated strawberry (Fragaria × ananassa).

Antanaviciute L, Šurbanovski N, Harrison N, McLeary KJ, Simpson DW, Wilson F, Sargent DJ, Harrison RJ - Hortic Res (2015)

Combined map of ‘Redgauntlet’ × ‘Hapil’, depicting the position of Verticillium dahliae resistance QTL. Markers with a significance level of P<0.005 are highlighted in boxes, with p values between P<0.005 and P<0.05 shown as whiskers. Red boxes are QTL from ‘Redgauntlet’, blue boxes are QTL from ‘Hapil’ and pink are QTL found in both cultivars.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4595976&req=5

fig5: Combined map of ‘Redgauntlet’ × ‘Hapil’, depicting the position of Verticillium dahliae resistance QTL. Markers with a significance level of P<0.005 are highlighted in boxes, with p values between P<0.005 and P<0.05 shown as whiskers. Red boxes are QTL from ‘Redgauntlet’, blue boxes are QTL from ‘Hapil’ and pink are QTL found in both cultivars.
Mentions: Using data from the three years, QTL were mapped treating each year separately, using KW testing. Resistance was detected at seven loci across all three years, with a further locus significant in two out of three years and three loci highly significant but only in a single year (Table 2 and Figure 5). This led to a total of 11 QTL loci that were identified in at least one year of analysis.

Bottom Line: Average wilt scores were significantly associated with multiple QTL, which were mostly significant across all years.A clear and statistically significant relationship was observed between resistant, tolerant and susceptible material and the total number of markers present in the different resistance classes.These markers are abundant in the cultivated strawberry germplasm indicating that, despite the large number of markers, clear genetic gain is possible through marker-assisted breeding.

View Article: PubMed Central - PubMed

Affiliation: East Malling Research, New Road, East Malling , Kent ME19 6BJ, UK.

ABSTRACT
A biparental cross of octoploid strawberry segregating for resistance to Verticillium dahliae, the causative agent of Verticillium wilt, was screened under field conditions for three seasons. Average wilt scores were significantly associated with multiple QTL, which were mostly significant across all years. Markers significantly associated with the traits were used to screen material with known wilt resistance and susceptibility phenotypes. A clear and statistically significant relationship was observed between resistant, tolerant and susceptible material and the total number of markers present in the different resistance classes. In field situations resistance QTL appear to behave in an additive manner. These markers are abundant in the cultivated strawberry germplasm indicating that, despite the large number of markers, clear genetic gain is possible through marker-assisted breeding.

No MeSH data available.