Rosa canina (wild rose, bush, bramble, dog rose, rosehip) is a shrub commonly encountered in the wild flora of Romania, spread from the coast up to altitudes of 1200 m (1700), with low requirements to pedoclimatic factors. From this species are used the false-fruits (Cynosbati fructus) mature, dried, harvested from wild flora or cultures, with food and therapeutic importance, due to their multiple properties, but mostly because of its high content of vitamin C. In this way, it were studied the germoplasm sources existent in some areas of Oltenia (Romania) to identify valuable biotypes from biochemically and technologically point of view. The results indicate a high and very high variability of the analyzed parameters. Thus, the content of TSS was recorded between 10% (B2) and 18% (M1), vitamin C varied from 53mg/100g (B3) to 563 mg /100g to populations (S1 , S3) and acidity from 1.4% (B3) to 3.6% (M4). Recorded values for the mass of 100 fruit, between 117g (A1) and 286g (B3 and T4) and the percentage of pulp/100g fruit ranged from 49.2 (M1) and 66.5 (T1).

Water is essential to maximize crop yield and quality. This natural resource has assumed huge importance, especially in the warmest areas, where drought and environmental degradation has affected agricultural production. In order to identify drought tolerance of some groundnut genotypes and to investigate the relationships between seed yield, quality and drought tolerance indices a study was made using 10 promising genotypes. The experiment was carried out during 2014-2017 and sowed under randomized block design with four replicates. It included three factors: two levels of irrigation (a1 – non - irrigated and a2 - irrigated), two levels of fertilization (b1 – non-fertilized and b2 - 100 active Nitrogen/ha) and genotype (C1-C10). Seed yield depending on the influence of the factor, varied from 535.95 Kg/ha (non-irrigated) to 2020.95 Kg/ha (irrigated); from 1055.30 Kg/ha (non-fertilized) to 1501 Kg/ha (fertilized) and from 1111.30 Kg/ha to 1388 Kg/ha depending on genotype. Same influence factors for protein content varied from 25.65% (irrigated) to 28.61% (non-irrigated); from 26.33% (non-fertilized) to 27.93% (fertilized) and from 25.59% to 28.52% depending on genotype. Stress susceptibility index (SSI) varied from 0.964 to 1.040; Stress Tolerance Index (STI) from 0.138 to 0.435; Mean Productivity (MP) from 883.5 to 1616.0; Geometric Mean Productivity (GMP) from 750.3 to 1332.7; Tolerance index (TOL) from 933.0 to 1844.0; Harmonic Mean (HM) from 637.2 to 1099.0; Yield Index (YI) 0.777 to 1.308 and Yield Stability Index (YSI) from 0.236 to 0.309. High values of SSI, STI, YI, DI, RDI and SSPI indicate drought tolerance and those variants present high stability.

Twenty-five mutant/recombinant lines and the two parental forms of winter wheat were taken into study to assess the correlations between grain yield and some quality traits. This investigation was carried out at ARDS Caracal of University of Craiova, during 2015-2018 cropping seasons in randomized blocks design with 3 replications. It included two factors: A– influence of climatic conditions (2016-2017 favorable conditions (A1); 2017-2018 less favorable (A2) and 2018-2019 abnormal conditions (A3) and b – genotype. Observations were recorded after harvest for grain yield and some quality traits every year after harvest. All the analyzed traits such as proteins, starch, TKW, seeds number/ear, seeds weight/100, seeds weight/ear indicate the experimented material combine well high level of yield and superior quality percent in the grains.

The present paper analyses the effect of pre-treatment with salicylic acid (SA) on germination and the growth of winter wheat seedlings in water stress conditions induced by polyetylene glycol (PEG). A two-factor experiment was conducted in a completely randomized projection. The first factor (A) included three levels: a1-distilled water -control; a2 -0.25 mM SA; a3 -0.75 mM SA and the second factor (B) included three levels: b1-distilled water; b2 -15% PEG and b3 -25% PEG. Biological material was represented by a DH winter wheat line. It were made observations on germination percentage (GP), root length (RL), cotyledons length (CL), seedling fresh weight (SFW) and vigor index (VI). After the analysis of the obtained results it can appreciate that the 25% PEG concentration played the main role for the significant decrease of the germination percentage (GP) and vigor index (VI). Also, seeds pre-treatment with 0.75 mM SA could be a way to improve germination characteristics in drought conditions.

Fertilizing wheat with nitrogen plays an important role in obtaining high yield and quality. In Romania’s environmental conditions, data regarding nitrogen fertilization are reported in various studies at different N levels. The aim of this research was to study the effect of different nitrogen doses on yield and quality of several new mutant/recombinant lines of winter wheat. Field trials were carried out in south of Romania during 2015-2017 in a rape-wheat rotation. The design of the yield trial was as complete randomised blocks with four replications and included two factors: A – three variants of fertilization (N0, N50 and N100) and B – genotype (line). At harvest, the number of grains per spike, grain weight/spike, thousand grain weight, grain yield and hectolitre weight were analysed. In variants fertilized with N100 the highest values for all studied parameters (yield – 5104.55 kg/ha; grains weight/spike – 3.35 g; TGW – 48.31g; HW – 78.76; number of grains/spike – 58.35) were registered. These results confirm good efficiency of N application. Principal component analysis revealed that seven variants, which had both positive components were fertilized with N100 and were all ranked in firsts seven position in the yield classification.