Seed Production of Industrial Hemp Genotypes - Comparative Study

Abstract

The study comparatively analyzed the seed production of several genotypes of industrial hemp. The study and field experiments were carried out within ARDS Lovrin, in the period 2022 - 2024. Nine genotypes of industrial hemp (IHG) were cultivated: 'Silvana' - IHG1; '111 CS/08' – IHG2; 'Lv110+693/08' – IHG3; '375CS/19s 18s' – IHG4; '411 CS/01' – IHG5; 'Lv440/01' – IHG5; 'Lv 300' – IHG7; 'Silistra x Lv408/02 +9 CS/13' – IHG8; Lv 406/02' – IHG9. The experiment was organized in four repetitions for each genotype. During the study period, seed production varied between Y = 18.67 kg/ha (IHG1), and Y = 478.67 kg/ha (IHG7). The ANOVA test (Alpha = 0.05) confirmed the presence of variance in the data set and the statistical reliability of the experimental data. The data series recorded during the study period showed a decreasing trend, and the linear regression analysis described the distribution of the data series in terms of statistical safety (p<0.001). During the study period, the annual decrease of seed production was recorded, with average values ​​at the experiment level of  = 388.22 kg/ha (year 2022),  = 125.11 kg/ha (year 2023), respectively  = 29.59 kg/ha (year 2024). With seed production above the average value, in terms of statistical safety, the IHG3 and IHG7 genotypes were highlighted in 2022 year, the IHG9 genotype in 2023 year, respectively the IHG7 and IHG9 genotypes in 2024 year. The multivariate analysis described the correlation of the genotypes with the years of study (as biplot) based on the difference values ​​recorded for each genotype compared to the calculated average of the experiment. The cluster analysis grouped the studied genotypes into distinct clusters by the years of study, and based on the similarity between the genotypes within each cluster.