Articles
INTER-YEAR VARIABILITY OF POMOLOGICAL TRAITS EVALUATED IN DIFFERENT HAZELNUT CULTIVARS IN SLOVENIA
Article number
845_21
Pages
169 – 174
Language
English
Abstract
29 hazelnut cultivars were planted in a collection orchard in Maribor (NE Slovenia), in order to obtain initial information about their behaviour under Slovene pedoclimatic conditions.
They belonged to two groups.
The first (A) was planted over the period 1990-1992. It included 23 cultivars: 12 from Italy, 3 from Spain, 2 from France, 4 from the USA, 1 from the UK, and 1 from Slovenia.
Group (B) consisted of 6 cultivars from Oregon/USA which were planted in the spring of 1997. This paper presents inter-year variations measured as standard errors and coefficients of variability regarding nut shape index, maximum nut diameter, nut weight, kernel percentage, shell thickness, uniformity of nut and kernel shape, and the amount of kernel fibre, observed during the years 1995-1999 (A) and 2000-07 (B). Shell thickness was the most variable trait with CVs between 0% (Tonda Romana) and 60.6% (Fertile de Coutard). The last cultivar also had the least uniform kernel shape (scoring from 3 to 7) as well as the most variable kernel percentage (34.9-52.9%). Uniformity of nut shape was the most stable in Tonda di Giffoni, Daviana, Morell and Corabel (CV app. 6%) compared to Mortarella, Minnolara, Torino-119 and Pauetet (CV between 23 and 30%). The amount of fibre on the kernels also varied greatly from year to year.
In Corabel, it ranged from score 3 to 8, CV 43.2%. In contrast, Mortarella was the cultivar with the most homogeneous amount of fibre.
Maximum diameter of the nuts varied between 26.5% (Daviana) and 1.9% (Tonda Romana). When considering nut weight, Campanica showed the greatest inter-year variability (CV 40.7%), and To-123F the lowest (CV 5.1%). Before deciding on whether to introduce new cultivars into commercial situations, a longer evaluation, at least eight years, is recommended.
They belonged to two groups.
The first (A) was planted over the period 1990-1992. It included 23 cultivars: 12 from Italy, 3 from Spain, 2 from France, 4 from the USA, 1 from the UK, and 1 from Slovenia.
Group (B) consisted of 6 cultivars from Oregon/USA which were planted in the spring of 1997. This paper presents inter-year variations measured as standard errors and coefficients of variability regarding nut shape index, maximum nut diameter, nut weight, kernel percentage, shell thickness, uniformity of nut and kernel shape, and the amount of kernel fibre, observed during the years 1995-1999 (A) and 2000-07 (B). Shell thickness was the most variable trait with CVs between 0% (Tonda Romana) and 60.6% (Fertile de Coutard). The last cultivar also had the least uniform kernel shape (scoring from 3 to 7) as well as the most variable kernel percentage (34.9-52.9%). Uniformity of nut shape was the most stable in Tonda di Giffoni, Daviana, Morell and Corabel (CV app. 6%) compared to Mortarella, Minnolara, Torino-119 and Pauetet (CV between 23 and 30%). The amount of fibre on the kernels also varied greatly from year to year.
In Corabel, it ranged from score 3 to 8, CV 43.2%. In contrast, Mortarella was the cultivar with the most homogeneous amount of fibre.
Maximum diameter of the nuts varied between 26.5% (Daviana) and 1.9% (Tonda Romana). When considering nut weight, Campanica showed the greatest inter-year variability (CV 40.7%), and To-123F the lowest (CV 5.1%). Before deciding on whether to introduce new cultivars into commercial situations, a longer evaluation, at least eight years, is recommended.
Publication
Authors
A. Solar, F. tampar
Keywords
Corylus avellana L., cultivars, different origin, quantitative traits, phenotypic variability
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