GENETIC DIVERGENCE AND HETEROSIS IN LINSEED (Linum ussitatissimum L (original) (raw)
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Electronic Journal of Plant Breeding, 2014
Heterosis over better parent (BP) for seed yield and yield components in linseed was studied using line × tester analysis involving ten genetically diverse strains used as lines and four testers. The heterosis over better parent for seed yield plant-1 ranged from 48.69 to 552.85 %. Five crosses consistently exhibited significant positive heterobeltiosis for higher seed yield plant-1, viz., RLC-132 × RLC-92, R-4154 × Indira Alsi-32, R-4158 × Deepika, R-4129 × Kartika and RLC-132 × Kartika indicating that these crosses might be useful in linseed hybrid production. These crosses also had significant and positive heterosis for days to 50% flowering, number of capsules plant-1 and oil content and would be more desirable to exploit heterosis in linseed.
2016
Linseed or flax (Linum usitatissimum) is a diploid (2n=30), self pollinated annual plant (Ragupathy et al., 2011). It has been under cultivation for its seed oil (linseed) or stem fibers (flax) or both (dual purpose) for 1000 years (Dillman, 1953; Zohary, 1999). Globally, the important flaxseed–linseed cultivating and producing countries include Canada, India, China, the United Kingdom, Ethiopia, and the United States of America. In India, it is mainly grown as an industrial oil seed crop in marginal soils and rainfed conditions. Linseed is an important industrial crop plant as its oil with high linolenic acid content (45-65%) is used for manufacturing rapidly drying paints, stains, inks, varnishes and the polymer linoleum (Rowland, 1998). Besides its oil, the linseed fibers (phloem fiber) are used by industries for producing high quality linen fabrics, pulp, biofuel (Diederichsen and Ulrich, 2009), raw materials of thermal insulations (Kymalainen and Sjoberg, 2008) and bioplastics ...
Journal of Pharmacognosy and Phytochemistry, 2017
The present investigation was carried out during 2015-16 and 2016-17 using the experimental material consisting of parents Meera, T-397 and Sekhar and backcross progenies of (Meera X T-397) X Meera and (Sekhar X T-3397) X Sekhar. For both the crosses, F2 and F3 populations were grown in the rabi 2015-16 and 2016-17 respectively. An estimate of GCV and PCV for all characters studied revealed that the phenotypic coefficient of variation (PCV) was higher than their corresponding genotypic coefficient of variation (GCV). In F2 generation of cross (Meera X T-397) X Meera, high heritability coupled with high genetic advance as percent of mean was observed for yield per plant, primary branches per plant, capsules per plant and 1000-seed weight. In F3 generation, high heritability coupled with high genetic advance as percent of mean was observed for capsules per plant and yield per plant. In F2 generation of cross (Sekhar X T-397) X Sekhar, high heritability coupled with high genetic advanc...
Classification of diverse progeny of Linseed using multivariate analysis techniques
Multivariate technique is used to access the economic importance of linseeds by evaluating eleven agronomic traits. Among the studied traits, high coefficient of variation were observed for seed yield per plant (36.83%) followed by capsule per plant (34.83%) and biological yield (31.37%). Agglomerative hierarchical clustering method classified the 28 crosses into four clusters. A large number of crosses were placed in cluster I (13 crosses) followed by cluster III (10. The cross TL-11 x TL-27 and NDL 2004-05 x GS-234 had early maturing, high seeds per capsule and highest test weight. The first two principal components showed 59.88% of the total variation. The crosses namely R-552 x TL-11, R-552 x A.95.BR-552 x GS-234, R-552 x Shekhar, TL-11 x EC-1392, EC-1392 x GS-234 and EC-1392 x Shekhar were found positive value for both main components. This means that crosses can be used in future exploitations and can represent parent genotypes for some desirable trait. These results can now be used by breeders to develop high yielding linseeds hybrids. INTRODUCTION Flax (Linumusitatissimum L.; n = 15), also called linseed, an important oilseed crop belonging to Linaceaefamily, with 14 genera and over 200 species, is the only species in this family with economic and agronomic values (Tadesseet al., 2009). Possibly, this crop species has originated from LinumangustifoliumHuds. (n = 15), native to the Mediterranean region (Tadesseet al., 2009). The cultivated Linum species have more economic values.This crop is grown for fibre (fibre flax), seed oil (linseed) or both seed oil as well as fibre, but recently it has gained a new interest in the emerging market of functional food due to its high content of fatty acids, alpha linolenic acid (ALA), an essential Omega-3 fatty acid and lignin oligomers which constitute about 57 % of total fatty acids in linseed (Reddy et al., 2013).Improvement in seed yield and related traits for different end uses is essential for the development of linseed hybrids. Multivariate data analysisfacilitates a graphic display of the underlying latent factors and an interface between individual samples and variables (Nielsen and Munck, 2003). Principal component analysis (PCA) has been widely used in plant sciences for a reduction of variables and grouping of genotypes.The main objective of the study was to characterize and classify diverse progeny of linseed based on their overall similarity in agronomic data.
The experiment was conducted using simple lattice design with two replication and the trails was totally consisted fifty six genotypes. Data on seed yield and other Agronomic traits were used to estimate the genetic variability parameters, heritability and genetic advance (GA). Analysis of variance revealed highly significant and significant difference for all studied traits. Evaluated characters were exhibited different levels of variability, heritability and genetic advance among the studied genotypes. Low to high phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) were recorded. The highest GCV and PVC values were found particularly for lodging percent (76.65% and 90.63%), harvest index (42.26% and 47.92%) yield per hectare (41.23% and 48.19%) and number of capsule per branch (30.81% and 37.25%) respectively, whereas low GCV and PCV (8.27% and 9.73% respectively) manifested for days to maturate. The highest broad sense heritability value manifested for harvest index (77.78%) followed by seed yield per hectare (73.21%), while lowest heritability (3.78%) revealed only for seed per capsule. In present study low to moderate genetic advance were manifested and high heritability and genetic advance as percentage of mean (>50) was recorded for lodging percentage, number of capsule per branch, seed yield per hectare and harvest index, indicating predominance of additive gene action for these characters. Therefore the result of this study suggests existence of variability for seed yield and other agronomic traits in these linseed genotypes, which should be exploited in future breeding.
In the present study, the estimates of the parameters of variability viz., phenotypic coef-ficient of variation, genotypic coefficients of variation, heritability in broad sense (h 2), expected genetic advance expressed as percentage of mean and mean performance of various quantitative traits of linseed were studied. The analysis of variance revealed highly significant differences among the treatments for all traits. The magnitude of phenotypic coefficient of variation (PCV) was higher than genotypic coefficient of vari-ation for (GCV) all the characters. The high percentage of PCV was observed in grain yield/plant (67.96%) followed by biological yield /plant (54.11%), harvest index (53.90%), capsules/plant (50.42%), secondary branches (37.49%), primary branches (30.16%), grain yield/plot (25.40%) whereas, the GCV percentage was high in grain yield/plant (64.10%) followed by harvest index (52.75%), biological yield/plant (50.94%), capsules/plant (45.47%), secondary branches/plant (3...
Genetic Variability in Bold Seeded genotypes of Linseed (Linum usitatissimum L.)
International Journal of Current Microbiology and Applied Sciences
The recent experiment with the title “Genetic variability in bold seeded linseed (Linum usitatissimum L.) was conducted in “Research cum instructional farm, Department of Genetics and Plant Breeding, College of Agriculture, IGKV, Raipur, C.G.” during rabi season 2021-2022, we used total 40 bold seeded (> 6.5 gm of 1000 seed weight) linseed genotypes including 5 checks (RLC-133, RLC-138, RLC-143, RLC-148 & RLC- 153), we used Randomized complete block design with three replications for sowing the seed in field and observations were recorded for different agro morphological traits, listed on linseed descriptors Kanpur (2010) are “days to commencement of flowering, plant height(cm), days to 50 % flowering, days to maturity, number of primary branches per plant, number of secondary branches per plant, total number of branches per plant, number of capsules per plant, number of seeds per plant, 1000 seed weight (g), oil content (%), harvest index (%), and seed yield per plant (g).” All ...
Assessment of Genetic Diversity in Linseed (Linum usitatissimum L
Excellent publisher, 2020
In this experiment 55 linseed genotypes were evaluated to determine genetic diversity by Mahalanobis D2 statistics during rabi 2018-19 at the Department of Plant breeding and Genetics, Orissa University of Agriculture and Technology, Odisha India. It revealed that 55 genotypes were grouped into eleven clusters. Result envisaged that genotypes grouped within a particular cluster are more or less genetically similar. Genotypes grouped into cluster I were showed maximum intra-cluster diversity while maximum inter-cluster diversity was observed between cluster XI and V followed by cluster XI and X. So, it could be suggested that hybridization program involving genotypes from the farthest diverse clusters (Cluster XI and V and cluster XI and X) are likely to achieve wider and desirable heterotic recombinants or even transgressive segregants.
Agricultural Science Digest - A Research Journal, 2014
Linseed is an important oilseed crop which belongs to the family linaceae. Thirty six genotypes of linseed were evaluated for genetic variability, heritability and genetic advance. High phenotypic and genotypic coefficient of variation values were observed for seed yield, number of capsules per plant, biological yield, number of primary branches per plant and number of secondary branches per plant. High heritability coupled with high genetic advance was observed for number of capsules per plant, seed yield per plant, biological yield, plant height and number of primary branches per plant, indicating that heritability is due to additive gene action and selection based on these characters may be effective.
Heterosis and inbreeding depression in linseed
Advance Research Journal of Crop improvement, 2016
Five improved varieties of linseed namely, Meera, Shekhar, T-397, KL -221 and JLS -9 were crossed to obtain six F 1 s and F 1 s were selfed to get F 2 s. The estimates of heterosis revealed that none of the cross exhibited significant heterosis for all the characters over mid parent, better parent and check variety. The degree and direction of heterotic response varied not only from character to character but also from cross to cross. In general, considerable amount of significant desirable heterosis over mid parent, better parent and check variety were observed for few characters under study. Inbreeding depression in F 2 generation was estimated for all the characters and it was observed positively significant for seed yield per plant, stearic acid content, oleic acid content, linolenic acid content, linoleic acid content, palmitic acid content, primary branches per plant, capsule diameter, number of capsules per plant revealed significant positive inbreeding depression indicating detoriation in their performance in next generation.