Endophytic fungi from Vitis vinifera L. isolated in Canary Islands and ...

Variability analysis of grain yield in some maize hybridsGrada F. *1 , Ciulca S. 21 Agrozooservice Curtici, 2 USAMVB Timisoara, Faculty of Horticulture and Sylviculture*Corresponding author. Email: floringrada@yahoo.comAbstract Farmers are more interested in cultivars that produce consistentyields under their growing conditions and breeders also want to fulfill theseneeds. Identification and evaluation of the factors contributing to year-to-yearfluctuation in crop yields could provide a basis for the assessment ofproduction risk and for adjustments in management practices to reduce risk.The objective of this work was to evaluate the grain yield of differentcommercial maize hybrids under the agro climatic condition of Curtici areaduring 2009-2011 and to asses the magnitude of diversity among them.Given the average values over the three years it is noted that in 2010 weatherconditions were very significantly favorable compared to 2009 and 2011 interms of grain yield achieved by studied maize hybrids, allowing the obtainingof 21-22% yield gains. The highest mean grain yield over 10 t/ha and alsosignificant increases were mainly recorded by some hybrid of FAO maturitygroup 400, (PR36V74, DKC 5276, PR36D79, PR36K67, PR36V52), as wellas hybrids of group 300 (DKC, 4685, DKC 4490, DKC 4889). A special caseis represented by the earlier hybrids DKC4082 and DKC 3511, which alsohave registered yield levels of approximately 10 t/ha.Key wordsmaize, grain yield, variabilityIdentification and Study of Useful Germplasm Resources forBreeding at Climbing BeanBrezeanu Creola 1 *1 Vegetable Research and Development Station Bacau*Corresponding author. Email: creola.brezeanu@yahoo.comAbstract A particularly important treasure for each country is the volumeand the genetic value of species, subspecies and plants populations, calledgermplasm (plant genetic resources). Variability of plant forms today is theresult of human activity, by using in breeding wild forms, changing areas andacclimatization of plants in other than their geographic areas. Currently, thecollection, study and conservation of genetic resources are topical issueswhich concern us. The aim of the study is to save precious resources that areendangered, by collecting local native populations, old, primitive varieties,which are under risk in order to reduce genetic erosion and save entirematerial obtained by breeding. Promising genotypes were identified (superiorplant characteristics, such as: seed‟s size, plant‟s height, insertion of first-pod,number of pods per plant, number of seeds in pod, resistance to drought andpathogens and early maturation). The study presents all this items for adiverse collection of ten Phaseolus vulgaris varieties used in breeding atVegetable Research and Development Station, Bacau.Key wordslocal populations, line,variability