Genetic Variability, Standardized Multiple Linear Regression and Principal Component Analysis to Determine Some Important Sesame Yield Components

Sesame is an important commodity in supporting various industries such as low saturated fat oil producing and are often able to adapt under stressed grown conditions. Breeding sesame is undertaken to increase production and is possible by radiation induced polygenic characteristic changes with a gamma rays source. The study aims to identify the effectiveness of genetic variability, standardized multiple linear regression, and principal component analysis to determine some important sesame yield components for indirect selection. Eighteen sesame mutant lines (black and white types) were studied for eleven quantitative traits. Two sesame types were irradiated with eight doses (100-800 Gy) of gamma rays individually. Variability studies on seed yield and yield components are important raw material of high productivity for all studied traits. Standardized multiple linear regression analysis is the most effective way to provide information of relationship between seed yield and yield components in sesame mutant lines for indirect selection

Study on Genetic Variability, Heritability, Genetic Advance and Correlation among different characters in tomato (Solanum lycopersicum L.)

The present investigation entitled “Studies on genetic variability in tomato (Solanum lycopersicum L.)” was carried out at the UCOA, vegetable research farm, Guru Kashi University, Talwandi Sabo, Bathinda during rabi 2015-16 to evaluate tomato genotypes. The experiment was laid out in CRD with three replications. Total 20 genotypes including check cultivar were evaluated for horticultural Traits contributing yield and quality (suitable for processing) .There is a wide variability in different genotypes in tomato. Traits i.e. Number of primary branches per plant, Days to first fruit harvest, Plant height (cm),number of fruits per cluster, number fruits per plant, average fruit weight (gm), equatorial diameter of fruit (cm), polar diameter of fruit (cm), number of locules per fruit, pericarp thickness (mm), fruit pH, Fruit TSS (0brix), days to last fruit harvest and average yield per plant (kg) were studied during the investigation Analysis of variance showed significant differences among genotypes for all the characters under study during the investigation. High Phenotypic and Genotypic coefficient of variation were detected for characters like number of fruits per plant, number of locules per fruit, pericarp thickness and average yield per plant. High heritability coupled with genetic gain were recorded for number of fruits per plant, average fruit weight, number of locules per fruit and average yield per plant. Therefore these characters also show some scope for improvement through selection. A highly significant and positive phenotypic and genotypic correlation were found in number of fruits per cluster, plant height, number of fruits per plant and average fruit weight

Genetic structure of Dreissena polymorpha population from small and isolated water bodies = Генетическая структура популяции D. рolymorpha малых и изолированных водоемов

The article contains the analysis of the genetic structure and level of genetic variability of selected populations of D. polymorpha from Western Pomerania

Genetic variability of some Italian and Polish duck breeds

This study is aimed to estimate and compare the inter- and within-breed variability of duck populations under genetic conservation programmes. The following four duck breeds were analysed: Germanata Veneta (AGV) and Mignon (AMG) from Italy, Pekin Krajowy (33P) and Pomniejszona (2K) from Poland. The characterisation of the four populations was carried out through a panel of 23 microsatellite markers. The analysis involved 180 individuals: 39 for AGV, 41 for AMG, 50 for 33P and 50 for 2K. An average of 11.36 alleles per locus was identified. Twenty-two loci showed high values of polymorphism information content from 0.575 to 0.912, while CAUD136 was monomorphic for the Italian breeds. The breeds showed relatively high heterozygosity: higher for the Polish populations (0.6920 for 33P and 0.6521 for 2K), and lower for the Italian (0.4497 and 0.3718 for AGV and AMG, respectively). The inbreeding coefficient was higher for the Italian breeds, AMG in particular (0.133, 0.097 and 0.121), as well as the differentiation index (0.253). The Nei’s minimum distances (DM) and Reynolds distances (DR) were low between the Polish populations (0.131 and 0.088, respectively); these were associated to AGV (DM = 0.191 and DR = 0.259 for 33P; DM = 0.174 and DR = 0.226 for 2K). Finally, AGV was distant from AMG (DM = 0.259 and DR = 0.317). The molecular coancestry, or mean kinship was higher for the Italian breeds compared to Polish populations. The Italian populations showed intermediate values. The obtained results can be perceived as an important tool for the applied genetic conservation programmes

Ex Situ Conservation Of Holstein-Friesian Cattle - Comparing The Dutch, French And USA Germplasm Collections

The establishment of gene banks using cryopreservation to secure the genetic diversity of farm breeds have been widely assessed. France, the Netherlands and the USA were among the first countries to organize national cryobanks and these banks are now 10 to 20 years old. All three countries have started Holstein-Friesian (HF) collections to conserve as much genetic diversity as possible for this globally important breed. In order better understand the diversity captured in these collections, the genetic variability of HF collections within and between countries was assessed, and genetic variability of germplasm collections were compared with active bulls in each country. The overall aim of the project was to determine the breed’s security and to guide future collection activities