Determination of marker alleles linked to scab resistance in multiresistant Hungarian apple cultivars

2020 ◽  
pp. 49-54
Author(s):  
I. Király ◽  
V. Mihálka ◽  
A. Hüvely ◽  
J. Pető ◽  
A. Palkovics ◽  
...  
Keyword(s):  
Scab Resistance ◽  
Apple Cultivars ◽  
Marker Alleles

Introgression of the Vf source of scab resistance and distribution of linked marker alleles within the Malus gene pool

1999 ◽  
Vol 99 (6) ◽  
pp. 1039-1046 ◽  
Author(s):  
G. J. King ◽  
S. Tartarini ◽  
L. Brown ◽  
F. Gennari ◽  
S. Sansavini
Keyword(s):  
Gene Pool ◽  
Scab Resistance ◽  
Marker Alleles

scholarly journals Using scab resistant donors in apple breeding

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 600-603
Author(s):  
B. Gelvonauskis ◽  
D. Gelvonauskienė
Keyword(s):  
Combining Ability ◽  
Apple Scab ◽  
General Combining Ability ◽  
Scab Resistance ◽  
Mean Square ◽  
Genetic Progress ◽  
Apple Cultivars ◽  
The Mean ◽  
Half Diallel ◽  
Selection Of

Apple cultivars were crossed according to the half-diallel and topcross mating design. Apple scab resistance of seedlings was estimated by using a 0–5 scale: 0 – no infection on leaves, 5 – more than 75% of leaf area infected. Percentage of scab resistant seedlings in crosses involving cultivars Prima varied from 35.8% to 67.6%, involving cultivars Florina and Arbat – 51.9–59.5% and 53.5–72.5%, respectively. Significant differences for resistance to scab were found among the crosses. Both general combining ability (GCA) and specific combining ability (SCA) were highly significant. The significance of GCA for scab resistance shows that genetic variability exists for this trait and selection should result in genetic progress, because the mean square for GCA was larger than that calculated for SCA. Therefore, selection of parents on its phenotype should be effective for development of resistant apple cultivars. The significant SCA estimates indicate that a large number of resistant seedlings from particular crosses should be selected.

scholarly journals Allelic Diversity in Apple Germplasm for Fruit Quality and Scab Resistance Using SSR Markers

2019 ◽  
pp. 1-8
Author(s):  
Atifa Rasool ◽  
K. M. Bhat ◽  
H. U. Rehman ◽  
M. A. Mir ◽  
Shafia Zaffar ◽  
...  
Keyword(s):  
Ssr Markers ◽  
Fruit Quality ◽  
Allelic Diversity ◽  
Plant Biotechnology ◽  
Scab Resistance ◽  
Vf Gene ◽  
Apple Cultivars ◽  
Resistant Genotypes

The present investigation entitled “Allelic diversity in apple germplasm for fruit quality and scab resistance using SSR markers” was conducted in division of plant biotechnology, SKUAST-K, Shalimar during the year 2018. In the present study, four SSR markers namely Md-ACS-1, Md-ACO-1, ALO-7 and AM-19 were used for screening of 40 apple cultivars presently under cultivation in SKUAST-K for quality and scab resistance. The results revealed that out of 40 cultivars evaluated, 3 were found homozygous (ACS-1-2/2), 17 were heterozygous (ACS-1-1/2) and 10 were homozygous (ACS-1-1/1), while as no amplification of ACS-1 was found for 10 cultivars. Similarly, for Md-ACO-1, 3 cultivars were found homozygous, 35 as heterozygous and 2 did not show any amplification. As far as presence of Vf gene conferring resistance against scab disease, ALO-7 amplified at 820bp and 570bp alleles, 570 bp fragment was observed in resistant genotypes and was absent in susceptible genotypes, while the 820 amplicon was observed in both resistant and susceptible genotypes. The markers AM19 led to the amplification of 520 bp fragment in few cultivars.

scholarly journals Determination of S-allele Genotypes of 21 Apple Cultivars and Strains and Confirmation of 45 Others by Controlled Crosses.

1998 ◽  
Vol 67 (6) ◽  
pp. 880-889 ◽  
Author(s):  
Sadao Komori ◽  
Junichi Soejima ◽  
Kazunori Kudo ◽  
Hidetoshi Kyotani ◽  
Kazuyuki Abe ◽  
...  
Keyword(s):  
Apple Cultivars ◽  
Controlled Crosses ◽  
S Allele

New apple-tree (Malus domestica Mill.) varieties as sourses of breeding valuable traits

2021 ◽  
pp. 90-97
Author(s):  
TI Krasulia
Keyword(s):  
High Resistance ◽  
Malus Domestica ◽  
Apple Tree ◽  
Stable Expression ◽  
Scab Resistance ◽  
Biological Traits ◽  
High Quality ◽  
Apple Cultivars ◽  
Stable Yield ◽  
New Cultivars

Aim. To identify sources of several valuable economic and biological traits among new Ukrainian and foreign cultivars. Results and Discussion. The weather in the spring of 2019 and 2020 contributed to the epiphytotic development of scab, which allowed for assessment of susceptibility of new cultivars to this disease and for identification of sources of high resistance to it. There were no pathogen signs in immune cvs. Harant, Goldrush, Topaz, and William's Pride, which are carriers of the scab resistance oligogen (Vf). No cultivars that would be consistently highly-resistant to this disease in the field have been found. The creation of cultivars with a columnar crown remains a promising trend in breeding. Cv. Ruslan is a columnarity source. As to fruit yield, the leaders were Elise, Geneva Early, Goldrush, Honeycrisp, Pilot, and Topaz. Cvs. Harant, Ruslan, Elise, William's Pride gave stable fruit yields. Cvs. Kakhovske, Alionushkino, Julia, Honeycrisp, and Topaz give yields every year. Cvs. Harant, Malakhit and Rubin are sources of large fruits. Cv. Harant is noticeable for stable expression of this trait, which makes it a reference of large fruits. Mid-sized apples are considered the most optimal for selling. The sources of this trait are cvs. Ruslan, Elise, Honeycrisp, Szampion Arno, and Topaz. Most of the studied cultivars have round or flat-round fruits. Kakhovske apples are distinguished by their unordinary oval (sinapoid) shape. Sources of several features that determine highly-attractive appearance of their fruits have been distinguished. These are cvs. Harant, Malakhit, Ruslan, Elise, Geneva Early, Honeycrisp, Rubin, and William's Pride. Apples of cvs. Kakhovske, Elise, Honeycrisp, Rubin, and William's Pride are characterized by excellent palatability. Cultivars that are sources of several valuable economic and biological traits have been selected. Conclusions. Modern apple cultivars are starting material for creating new cultivars that will meet the future requirements. Cvs. Harant, Ruslan, Elise, Honeycrisp, Topaz, and William's Pride are sources of the maximum number of selectively valuable traits. By crossing them with cvs. Kakhovske, Malakhit, Alionushkino, Geneva Early, Goldrush, Julia, Pilot, and Rubin, it is possible to obtain genotypes with various ripening periods, which would combine immunity to scab, compact crown, high and stable yield, and high quality fruits.

AN ASSESSMENT OF THE DURABILITY AND SUSCEPTIBILITY OF SCAB RESISTANCE IN APPLE CULTIVARS

2004 ◽  
pp. 221-224 ◽  
Author(s):  
H. Kemp ◽  
M.P. van der Maas ◽  
R.E. Voorrips ◽  
R. Groenwold ◽  
W.E. van de Weg
Keyword(s):  
Scab Resistance ◽  
Apple Cultivars

scholarly journals Molecular screening of domestic apple cultivars for scab resistance genes in Greece

2020 ◽  
Vol 56 (No. 4) ◽  
pp. 165-169
Author(s):  
Lefkothea Karapetsi ◽  
Irini Nianiou-Obeidat ◽  
Antonios Zambounis ◽  
Maslin Osathanunkul ◽  
Panagiotis Madesis
Keyword(s):  
Resistance Genes ◽  
Venturia Inaequalis ◽  
Apple Scab ◽  
Scab Resistance ◽  
Molecular Screening ◽  
Polygenic Resistance ◽  
Main Target ◽  
Efficient Control ◽  
Apple Cultivars ◽  
Efficient Breeding

Apple scab caused by Venturia inaequalis has the most destructive effects among other phytopathogens in apple crops all over the world. The integration of resistance genes from local and domestic cultivars is a prerequisite for the efficient control of this disease and is a main target in efficient breeding approaches. Across Greece, many domestic apple cultivars are reported without deep knowledge about the presence and diversity of scab resistance genes. In this study, the presence of five resistance genes (Rvi2, Rvi4, Rvi6, Rvi8 and Rvi11) was evaluated across twenty local and domestic apple genotypes, employing twelve molecular markers closely linked to known apple scab resistance loci. Significant differences and polymorphisms among the tested cultivars were detected suggesting that some of them carry a sufficient number of resistance genes. This observed genetic diversity could be exploited in ongoing breeding approaches as a natural source of polygenic resistance against apple scab.

Sign in / Sign up

Export Citation Format

Share Document