PJB-2023-419
CHARACTERIZATION OF BRASSICA ADVANCED LINES (F9:10) FOR MORPHOLOGICAL AND BIOCHEMICAL TRAITS
Haris Abdullah
Abstract
ABSTRACT The primary objective of plant breeding is to create novel cultivars with enhanced yields. This study aimed to assess the genetic variability, heritability, and genetic advance within different traits of Brassica genotypes under field conditions. In the year 2020-21, at the University of Agriculture Peshawar, an investigation was carried out involving 18 Brassica genotypes. This evaluation utilized a randomized complete block design (RCBD) with three replications. The study found significant differences between genotypes for all studied parameters except linolenic acid content and pod width. Genotype, G-77 in F(9:10) population had early flowering (89.1 days) and maturity (162.3 days), high oil content (49.2%), and low glucosinolate content (76.4 µMg-1) with (10) primary branches. Genotype, G-92 exhibited superior agronomic traits, including long main raceme length (112.6 cm), and abundant pods main raceme-1 (104.3). Genotype, G-93 produced longer pods (7.2 cm) with maximum seeds pod-1 (35.9) and high 1000-seed weight. Genotype, G-70 produced wider pods (0.5 cm) with high protein (24.6%) and linolenic acid (9.6%) content. Genotype, G-102 showed the highest seed yield (2156 kg/ha) with desirable plant height (204.3 cm) and low moisture content (5.2%). Genotype, G-90 had high oleic acid content (50.8%) and G-91 had low erucic acid content (49.7%). High heritability (0.96) with a genetic advance of (1.34 gm) was estimated for 1000 seeds weight. Moderate heritability was estimated for Days to maturity (0.34) with expected genetic advance (0.83 days), pod width (0.41) with expected genetic advance (0.03 cm), erucic acid (0.43) with expected genetic advance of (2.28 %) and oleic acid (0.38) with expected genetic advance of (3.24 %) , while low heritability was estimated foe linolenic acid (0.11) with expected genetic advance of (0.11 %) and oil content (0.12) with expected genetic advance of (0.48 %). Traits were found to have varying levels of heritability, and genetic improvement is expected to be greater in traits with higher heritability. G102, Zahoor, G51, and G84 could be potential genotypes for breeding programs of high-related traits in Peshawar, KP.
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