Abstract
The present study was carried out at Qlyasan locations, in Kurdistan Region-Iraq, Agricultural Research Station, College of Agricultural Engineering Sciences-University of Sulaimani, according to half diallel mating system using seven pea cultivars (1-Avolla, 2-Americana, 3-Jeza, 4-Joneor, 5-Pack land, 6-Arvena and 7-Samara) with 21 F4 crosses. The genotypes were planted in a completely randomized block design with three replications. Highly significant mean squares due to genotypes were recorded indicating the presence of sufficient variability among genotypes for all traits. The mean squares due to gca and sca were significant for all the studied traits. The highest positive heterosis values estimated as the F4s deviation from mid parental values recorded by the cross 2×6 and 4×5 for almost all traits. Maximum positive gca effect values for seed weight plant-1, biological yield plant-1 and pods number plant-1 were recorded by parent 4, while parent 2 showed the best value for some components. The cross 4×5 was the best sca combiner for seed weight plant-1 and some its components including pods number plant-1, pod weight plant-1 and seed number pod-1. The type of gene action as controlled the inheritance of all characters was over dominance except 100-seed weight. Heritability in broad sense was found to be high for all treats except seed number pod-1 which was moderate, while at narrow sense it was high for average pod weight, pod length, seed weight pod-1 and 100-seed weight.
Highlights
Pea (Pisum sativum L.) is a self-pollinated crop, diploid having 14 chromosome (2n=14)
The genotypes (7+21 F4) in (Table 1), were planted at Qlyasan locations, at Kurdistan Region-Iraq, Agricultural Research Station, College of Agricultural Engineering Sciences-University of Sulaimani, located (Lat 35° 34′ 307′′; N, Long 45° 21′ 992′′; E, 765 masl) 2 km North West of Sulaimani City, which produced according to half diallel mating system
The statistical genetic analysis was based on half diallel mating system (41)
Summary
Pea (Pisum sativum L.) is a self-pollinated crop, diploid having 14 chromosome (2n=14). Parent 6 recorded maximum value for pods number plant-1, seeds weight combining ability in garden pea involving twenty one crosses and seven parents.
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