Selection criteria for assessing drought tolerance in a segregating population of flax (Linum usitatissimum L.)

Asgarinia, P; Mirlohi, Aghafakhr; Saeidi, Ghodratollah; Mirik, Ali Akbar Mohamadi; Gheysari, Mahdi; Razavi, V

doi:10.1139/cjps-2016-0140

Cited by 12 publications

(5 citation statements)

References 39 publications

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“…Higher water stress tolerance in brown-seeded families may be attributed to secondary metabolites biosynthesis such as lignans and tannins in the seed coat. Similar to this interpretation, Asgarinia et al 27 , Pizzi and Cameron 29 and Hassanpour et al 30 reported that brown-seeded genotypes were more resistant to drought stress due to the higher hardiness of seed coat, the presence of secondary metabolites, tannins, and their antioxidant properties compared to yellow-seeded genotypes. Tannins present in the brown seed coat can also influence seed vigor 34 .…”

Section: Discussionmentioning

confidence: 57%

Water stress intensified the relation of seed color with lignan content and seed yield components in flax (Linum usitatissimum L.)

Zare

Mirlohi

Saeidi

et al. 2021

Sci Rep

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This study aimed to investigate the effect of yellow and brown seed coat color of flax on lignan content, seed yield, and yield components under two contrasting environments of non-stress and water stress conditions. The water stress environment intensified the discrimination between the two seed color groups as the yellow seeded families had lower values for seed yield components under the water stress. Heritability and the genetic advance for seed yield were significantly higher in brown-seeded families than those of yellow-seeded ones at water stress conditions. Secoisolariciresinol diglucoside (SDG) as the chief lignan in flaxseed was more abundant in yellow-seeded families under the non-stress environment but under water stress conditions, it increased in brown seeded families and exceeded from yellow ones. Considering that the brown and yellow seed color families were full sibs and shared a similar genetic background but differed in seed color, it is concluded that a considerable interaction exists between the flax seed color and moisture stress concerning its effect on seed yield and yield components and also the seed SDG content. Brown-seeded genotypes are probably preferred for cultivation under water stress conditions for better exploitation of flax agronomic and nutritional potentials.

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Section: Discussionmentioning

confidence: 57%

Water stress intensified the relation of seed color with lignan content and seed yield components in flax (Linum usitatissimum L.)

Zare

Mirlohi

Saeidi

et al. 2021

Sci Rep

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“…These findings were like Paul et al (2017), who also observed that the PCV values were greater than the GCV values for all the traits studied. Previous studies by Basavaraj et al (2011) and Asgarinia et al (2014) stated high PCV and GCV for number of capsules per plant, number of seeds per capsule and yield per plant. Hence, selection for number of primary branches, number of capsules per plant and seed yield per plant are influenced by environmental effects from difference between the PCV and GCV was high could be due to the heterogeneity in soil fertility status and other unpredictable factors (Reddy et al, 2012).…”

Section: Coefficient Of Variation Phenotypic and Genotypic (Pcv And Gcv)mentioning

confidence: 82%

Genetic Diversity and Heritability Analysis of Linseed (Linum Usitatissimum L.)

Toor,

Kumar,

Alka

2024

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The experiment was carried out for 20 genotypes were subjected to diversity analysis, cluster analysis, heritability, correlation and path analysis. High PCV and GCV for the secondary branches (SB), followed by plant stand per plot (PSP), further trialed by yield per hectare (YH) and trialed by number of capsules per plant was greater than > 20% .High broad sense heritability was found for days to 50% flowering (DTF), followed by height (H), pursued by number of capsules per plant (NOCP), (98.49%), tailed by secondary branches (95.54%) and further monitored by plant stand per plot (88.89) and ensued by yield per hectare (91.23). Also, high heritability is governed by additive gene action for these characters. Characters with moderate heritability with low genetic advance as percentage of mean are governed by non-additive gene action and direct selection may not be possible because most of the variation in attributes due to the environmental effects. The high genetic mean advance for height (H), followed by primary branches (PB), pursued by secondary branches (SB), further followed by number of seeds per capsules (NOSC), trailed by plant stand per plot (PSP), yield per hectare (YH) and number of capsules per plant (NOCP). In the present study, days to 50% flowering (DTF) were correlated, significantly to the days to 75% maturity (DTF) (0.7991, 0.5391) and secondary branches (SB) (0.4511, 0.4181) significantly. Also, days to 75% maturity (DTM) positively and significantly correlated to height (H), secondary branches, number of seeds per capsule (NOSC) and 1000-seed weight (SW). Similarly, number of capsules were positively and significantly correlated to primary branches (PB) (0.6960, 0.5854) and yield per hectare (YH) (0.4977, 0.4912). Also, days to 75% maturity (DTM) were negatively and significantly to number of capsules per plant (NOCP), primary branches (PB) and 1000 seed weight (SW). Number of capsules per plant (NOCP) negatively correlated to secondary branches (SB) and number of seeds per capsule (NOSC). It showed positive and significant direct effect for primary branches (PB) i.e., 0.5882, number of seeds per capsule (NOCP) i.e 0.4784 and plant stand per plot (PSP) 0.7529 and non-significantly positive for number of capsules per plant (NOCP), secondary branches (SB) and seed yield per hectare (YH). The genotypic correlations difference was higher than the corresponding phenotypic correlation for all traits, indicating that environment plays a small role in the expression of the traits, which suggests an inheritance between these traits at the genetic level. Cluster analysis displayed 10 clusters with diversity with 5 genotypes in cluster so they are related and four clusters have single genotype so they unrelated to any cluster.

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“…The climate chamber experiments were conducted at the Julius Kühn Institute (JKI), Federal Research Centre for Cultivated Plants, Institute for Resistance Research and Stress Tolerance, Quedlinburg, Germany with 196 accessions. These were selected by the least-square means (lsmeans) of grain biomass of 2016 drought stress locations and 2017 Holetta (control treatment) by three drought indices namely, drought susceptibility index, tolerance index, and yield reduction index, as described by Asgarinia et al (2017). The results were used to cluster the 260 accessions into seven clusters, using SAS 'proc cluster' procedure (SAS Institute 2019), and 75.4% of accessions were randomly selected from each cluster to accommodate a set of 196 accessions used for climate chamber experiments.…”

Section: Climate Chamber Experimentsmentioning

confidence: 99%

Genome wide association study of Ethiopian barley for terminal drought stress tolerance under field and climate chamber conditions

Teklemariam,

Bayissa,

Matros

et al. 2023

CEREAL RESEARCH COMMUNICATIONS

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In order to detect markers for drought stress tolerance, field experiments in Ethiopia were conducted for three years at two naturally drought-prone locations and two optimum moisture locations using 239 Ethiopian barley landraces and 21 barley breeding lines. Furthermore, a climate chamber experiment applying drought stress at different water regimes (70% soil water capacity (WC) for control and 20% WC for drought stress conditions) after flowering was conducted for selected 196 accessions. Results revealed reduced grain biomass by 47% and 80% under field and climate chamber conditions, respectively, as well as significantly (p < 0.05) reduced days to maturity and plant height, in both experimental designs. Based on 10,644 SNP markers, GWAS was conducted to identify marker trait associations (MTA) for drought stress tolerance. For days to maturity, relative chlorophyll content, plant height, number of seeds per spike, thousand kernel weight, and harvest index under field and climate chamber drought stress treatments, 58 significant MTAs were identified. In total, 41.4% of the MTAs were located on chromosome 2H, of which one is very close to the Ppd-H1 flowering locus. These findings underpin the importance of this genome region for drought tolerance. Another MTA on chromosome 1H was detected for days to maturity under field drought stress treatment in the vicinity of the known flowering time ELF3 gene. Additionally, 13 and 3 Ethiopian landraces that tolerate severe and moderate drought stress in climate chamber and field experiments were identified, respectively, using drought indices. The results highlight the tolerance of Ethiopian landraces to different levels of drought stress as well as their potential to be considered in future barley improvement programs.

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Selection criteria for assessing drought tolerance in a segregating population of flax (Linum usitatissimum L.)

Cited by 12 publications

References 39 publications

Water stress intensified the relation of seed color with lignan content and seed yield components in flax (Linum usitatissimum L.)

Water stress intensified the relation of seed color with lignan content and seed yield components in flax (Linum usitatissimum L.)

Genetic Diversity and Heritability Analysis of Linseed (Linum Usitatissimum L.)

Genome wide association study of Ethiopian barley for terminal drought stress tolerance under field and climate chamber conditions

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