Joint International Conference on Long-term Experiments ...

MATHERIALS AND METHODS
Based on observations of several years we selected ten varieteies from our varieties
collection for diallel- parent. Seven varieteies got usable results (1:Léda, 2:Margó,
3:Foremos, 4:Presto, 5:Mariza, 6:Early sweet, 7:Debreceni korai velő) since the
crossing was not successful for all combination. We would like to produced a new early
pea varieteies with high yielding capacity parameters. We made the crosses in 2002, in
several repetitions depending the number of flowers. We sowed the parent and non-
reciprocal F1 generation beside net in 2003. We made the observations in more
qualitative and quantitative traits by instructions of UPOV. In this paper we analysed
the pod length, seed per pod, and pod number in one plan.
Statistical methods: The Model I. Method II of Griffing (1956) used for the combining
ability analysis of F1 data was:
xijk=μ+gi+gj+sij+rij+bk+eijk
where: μ= population means
gi= GCA effect for parent i,
gj= GCA effect for parent j,
sij= SCA effect for parents i and j,
rij= reciprocal effect
bk= block effect for block k,
eijk= error.
Diallel Analysis and Simulation Software by Burrow and Coors (1993) was used in this
study.
RESULTS
Phenotypic values
Seed per pod: the population average is 5,34 seed per pod. The parent number 3
(Foremos) has the most seed number (5,73), and the parent number 6 (Debreceni korai
velő) has the least (4,96). If we study these parent's combinations we can see that the
best combination is the 3x4. This combination has the highest seed number (6,45).
Combination of 4x6 has the least seed number (4,56).
Pod length: the population average is 5,35 cm. The Foremos has the longest pod, too
(5,70 cm) and the Margó ( parent number two) has the shortest pod length (4,96 cm).
We can get the best result for the 4x7 combination (6,25 cm) in our combination which
is better than the average. The worth combination is the 6x7 lines (4,20 cm).
The third trait which was analysed the pod per plant. The population average is 4,857
pods in one plant. Better then the average is the Léda (parent number 1) (5,50), worst
then the average is the Debreceni korai velő (4,27) (parent number 7).
To study the average of the combinations themselves have seen the most successfully
combination is the 1x6, the worst is the 2x4 combination (3 pods).
Effects of combining ability
The different btween genotypes in every traits were significant (P=0,01).
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