Evaluation of Brassica germplasm under semi cold rain fed conditions

摘要

To result, growing canola at the low temperatues, this plant is one of a few oil plants which can plant in fall at cold, semi cold and high areas. This research performanced to identify Brassica genotypes acccompanied by their agronomy characters in Sararood Agricultural Research Station in semi cold dry land conditions. 139 canola genotypes (napus, rapa and juncea) were compared observational. Each variety was planted in 2 rows with 10 meters length and distance row to row 30 cebtimeters. In growing season and after harvesting 8 traits recorded. Variation range and coefficient of variation showed observable variation among varieties and species for traits. Seed yield and its components (No. of pod in plant, No. of seed per pod and thousand seed weight) showed high variation. Factor analysis on the base of eigen value minimum expressed two factors for eight traits. Ratevariance was 0.99 for first two factor. Share first factor and second factor was 0.78 and 0.21 respectively. In 1th factor, No. of sub branch and No. of pod per plant had high positive loads which have been named morphological factor. In 2nd factor, seed yield and No. of seed per pod had high positive loads which have been named yield and yield components factor. This results showed, that increasing seed yield do through increasing No. of seed per pod. To generally can express that germplasm under studying had enough genetic variation and this variation can be used for progressing breeding projects. Also No. of seed per pod trait can introduce as positive selection index in rain fed.