Germplasm innovation for high-temperature tolerance from traditional rice accessions of Kerala using genetic variability, genetic advance, path coefficient analysis and principal component analysis

Background: Assessment of genetic variability and inter-relationship between the characters can be used in the breeding programme to evolve new varieties with wide genetic diversity to maximize the yield potential in crop improvement programmes. Eighty-four field pea genotypes were evaluated in an augmented block design for thirteen quantitative traits to study variance components, heritability, genetic advance and inter-relationship between the yield and yield contributing traits. Methods: The extent of phenotypic and genotypic variation that exist in a character was calculated by the formula suggested by Burton and de Vane (1953). Heritability in broad sense and genetic advance as per cent of mean for each character was computed using the formula suggested by Hanson et al. (1956) and Johnson et al. (1955), respectively. Correlation coefficient was calculated by method suggested by Searle (1961) and path coefficient analysis done as per method of Wright (1921) and elaborated by Dewey and Lu (1959).Result: Significant differences observed among the genotypes tested for the yield characters indicated the presence of variability. High heritability coupled with high genetic advance as percent of mean was observed for the traits viz., plant height, effective pods plant-1, harvest index and seed yield plant-1 were governed by additive gene effects which will aid in effective selection. Correlation coefficient analysis revealed that seed yield plant-1 had highly significant and positive correlation with biological yield plant-1, effective pods plant-1, harvest index, seeds pods-1 and effective nodes plant-1, indicating that these traits are strongly associated with seed yield in field pea. Path coefficient analysis identified biological yield plant-1 followed by harvest index, seed pod-1, effective nodes plant-1, 100-seed weight and day to 50% flowering as highly desirable components with great direct effects on seed yield.

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Genetic Variability, Character Association and Path Coefficient Analysis in Radish (Raphanus sativus L.)

The Agriculturists ◽

10.3329/agric.v8i2.7573 ◽

1970 ◽

Vol 8 (2) ◽

pp. 22-27

Author(s):

MZ Ullah ◽

MJ Hasan ◽

AHMA Rahman ◽

AI Saki

Keyword(s):

Genetic Variability ◽

Plant Height ◽

Root Length ◽

Root Diameter ◽

Leaf Width ◽

Path Coefficient ◽

Genetic Advance ◽

Root Yield ◽

Path Coefficient Analysis ◽

Positive Correlation

Genetic variability, correlation and path coefficient analysis of yield and yield contributing traits in twenty one varieties of radish were studied. Root length, leaf length and root yield showed high genotypic coefficient of variation and heritability with high genetic advance in percentage of mean. The highest genetic advance was observed in root yield. Root yield had significant and positive correlation with days to harvest, root length and root diameter, and showed only positive correlation with plant height and leaf width. Path coefficient analysis revealed that plant height had the maximum positive direct effect on root yield followed by root diameter, leaf width and days to harvest. Keywords: Genetic variability; radish; heritability; correlation; path analysis; root yield. DOI: 10.3329/agric.v8i2.7573 The Agriculturists 8(2): 22-27 (2010)

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Multivariate Analysis of Fruit Antioxidant Activities of Blackberry Treated with 1-Methylcyclopropene or Vacuum Precooling

International Journal of Analytical Chemistry ◽

10.1155/2018/2416461 ◽

2018 ◽

Vol 2018 ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

Jian Li ◽

Guowei Ma ◽

Lin Ma ◽

Xiaolin Bao ◽

Liping Li ◽

...

Keyword(s):

Principal Component Analysis ◽

Multivariate Analysis ◽

Antioxidant Enzymes ◽

Indirect Effect ◽

Antioxidant Activities ◽

Antioxidant Properties ◽

Radical Scavenging ◽

Principal Component ◽

Path Coefficient ◽

Path Coefficient Analysis

Effects of 1-methylcyclopropene (1-MCP) and vacuum precooling on quality and antioxidant properties of blackberries (Rubus spp.) were evaluated using one-way analysis of variance, principal component analysis (PCA), partial least squares (PLS), and path analysis. Results showed that the activities of antioxidant enzymes were enhanced by both 1-MCP treatment and vacuum precooling. PCA could discriminate 1-MCP treated fruit and the vacuum precooled fruit and showed that the radical-scavenging activities in vacuum precooled fruit were higher than those in 1-MCP treated fruit. The scores of PCA showed that H2O2 content was the most important variables of blackberry fruit. PLSR results showed that peroxidase (POD) activity negatively correlated with H2O2 content. The results of path coefficient analysis indicated that glutathione (GSH) also had an indirect effect on H2O2 content.

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Genetic Variability and Path Coefficient Analysis of Components of Ragi (Eleusine Coracana)

Experimental Agriculture ◽

10.1017/s0014479700004609 ◽

1969 ◽

Vol 5 (4) ◽

pp. 295-300 ◽

Cited By ~ 1

Author(s):

L. B. Chaudhari ◽

R. C. Acharya

Keyword(s):

Genetic Variability ◽

Seed Yield ◽

Eleusine Coracana ◽

Path Coefficient ◽

Genetic Advance ◽

Path Coefficient Analysis ◽

Varietal Differences ◽

Coefficients Of Variation ◽

Wide Range ◽

Range Of Variation

SummaryThe range, mean, genotypic and phenotypic coefficients of variation, heritability and genetic advance for various characters, of forty-seven varieties of ragi (Eleusine coracana) showed a wide range of variation and highly significant varietal differences. The genetic advance was highest for yield of straw and genotypic coefficients were higher than phenotypic coefficients for most characters. Path coefficient analysis indicated that the number of productive tillers and grain weight of main ears were the major components for seed yield.

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