Studies on Variability of Morphological Characters on Jamun (Syzygium Cuminii Skeels) Genotypes Growing in Northern Bastar Plateau Region of Chhattisgarh

Abstract

Surveys were undertaken for characterization and evaluation of genetic diversity of Jamun (SyzygiumcuminiiSkeels) of seedling origin for different morphological characters of tree characters and leaf characters during 2016-17 and 2017-18 in the Jamun growing in Northern Bastar Plateau region of Chhattisgarh areas. Investigations were undertaken during the entire vegetative phase to assess the distribution, range and to record the range of genetic variability of different morphological traits on the selected sixty trees. Mature leaves were plucked and analyzed for different parameters such as leaf surface and leaf glands. Results of evaluated Jamun genotypes showed wide variability for studied characteristic.

Character association and divergence studies in seedling population of Jamun (Syzygium cumini L.)

“…The values for phenotypic coefficient were recorded to be higher as compared to the values of genotypic coefficient of variations for all the characters indicating additive gene action and influence of environment on the expression of these traits. Similarly, higher phenotypic coefficient values as compared to genotypic coefficient values have been reported by Devi (2019) [5] while studying the genetic diversity of jamun germplasm. All the characters under study viz., fruit weight, fruit size, specific gravity, pulp to seed ratio, total soluble solids, acidity, ascorbic acid and yield efficiency showed positive phenotypic and genotypic variances.…”

“…more than 30 percent for yield efficiency. Similarly, Devi (2019) [5] also reported moderate to high PCV and GCV values for anthocyanin content, reducing sugar, non-reducing sugar, total sugar, TSS/acidity ratio, pulp/seed ratio and fruit/seed ratio. Slight variation in the values of PCV and GCV under different studies may be due to the fact that different genes are involved in the phenotypic expression of a quantitative trait.…”

“…Heritability was grouped in three classes, wherein, less than 10 percent heritability was classified as low, 10-30 percent as medium and 30-60 percent as high heritability (Robinson, 1966) [13] . Similarly, Devi (2019) [5] reported broad sense heritability of different characters among jamun genotypes ranging between 56.82 -99.91 percent. Abengmeneng et al (2015) [1] reported that high heritability may not be coupled with high genetic advance and heritability estimates in case of quantitative traits may be used to indicate the reliability of phenotypic value to predict the breeding value.…”

“…Path analysis exhibited 18.09 percent residual variance indicating that 89.01 percent of the total variance was explained by path analysis. Highest positive, direct effect towards fruit weight has been reported to be contributed by pulp to seed ratio followed by total sugar content, pulp weight, seed length, fruit length, leaf width, reducing sugar, seed width, leaf length, seed weight, anthocyanin content and fruit volume of jamun by Devi (2019) [5] .…”