Fruit quality of dog rose seedlings (Rosa canina L)

Abstract

SažetakPasja ruža (Rosa canina L) jedna je od najraširenijih samoniklih pripadnika roda Rosa u našoj zemlji, te prilično zastupljena u prirodnim, ruralnim pa i urbanim područjima. Iako se u svijetu pasja ruža proučava, uzgaja i oplemenjuje, u Hrvatskoj njezin uzgoj gotovo i ne postoji. U prirodi se mogu uočiti velike razlike među biljkama, posebno s obzirom na veličinu plodova, često i na vrlo malim staništima. Istraživanje je provedeno na 8 grmova pasjih ruža na oko 1 ha zapuštene poljoprivredne površine pokušališta 'Jazbina' u Zagrebu. Po 120 plodova u tehnološkoj zriobi nasumično je ubrano sa svakog grma. Prosječna masa ploda kretala se od 1,88 do 2,96 g, a prosječni udio svježeg mesa u plodovima od 65,4 do 74,7 %. Prosječni udio suhe tvari mesa (nakon sušenja na 105°C) u odnosu na težinu svježeg ploda varirao je od 22,9 do 28,6 %. Plodovi istraživanih biljaka statistički su se razlikovali (P≤0,05) po dimenzijama (duljina, širina, debljina), i obliku, a kako su biljke rasle u ujednačenim klimatskim i edafskim uvjetima može se zaključiti da na ovom malom lokalitetu postoji razmjerno velika fenotipska, a time vjerojatno i genotipska varijabilnost biljaka pasje ruže. Uz opravdanu pretpostavku da na području Republike Hrvatske ima mnogo sličnih staništa pasje ruže, rezultati ovog istraživanja ukazuju na bogati genetski potencijal pasje ruže koji bi se mogao iskoristiti za početnu selekciju biljaka superiornih svojstava namijenjenih uvođenju u kulturu. Ključne riječi: Rosa canina L., pasja ruža, stanište, varijabilnost biljaka, selekcija Abstract A dog rose (Rosa canina L) is one of the most widespread wild species of the genus Rosa in our country, and fairly represented in the natural, rural and even urban areas. Although in the world a dog roses are studied, cultivated and refined, in Croatia its cultivation almost does not exists. In nature you can see major differences between plants, especially considering the size of the fruit, often in very small habitats. The study was conducted at 8 rose dog bushes at about 1 ha of abandoned experimental field 'Jazbina' in Zagreb. From each plant, 120 fruits were randomly collected at a technological maturity. The average fresh fruit weight ranged from 1.88 to 2.96 g, the average fresh flesh portion from 65.4 to 74.7 % and the average dry flesh matter content (after drying at 105 °C), in relation to the fresh fruit weight, from 22.9 to 28.6 %. The

Diversity of the genus Rosa pomological traits in ecological conditions of continental Croatia

“…genotypes BEN CHEIKH-AFFENE et al (2013) reported that fruit mass varied from 0.90 to 1.90 g. ERSOY and ÖZEN (2016) determined that the average fruit mass of Rosa spp. genotypes ranged from 1.40 to 2.77 g. In Montenegro (Bijelo Polje region) ŠEBEK et al (2019) reported that fruit mass of Rosa canina L ranged from 1.25 to 2.76 g. According to ŠINDRAK et al (2012) the average fruit mass of eight Rosa canina seedlings ranged from 1.88 to 2.96 g. Obtained values in this study are in agreement or are slightly lower than the ones obtained in other countries. These results also indicate a large variation of this trait with a notable influence of environmental factors.…”

“…In Romania Rosa canina genotypes obtained a shape index values between 1.16 and 1.72 (GHIORGHIŢĂ et al, 2012b). ŠINDRAK et al (2012) reported significant difference between fruit shape index values of eight Rosa canina seedlings which ranged from 1.48 to 1.86. The values obtained in this study are comparable to the values obtained in other studies.…”

“…Genotype G5 had significantly lowest fruit flesh mass. BEN CHEIKH-AFFENE et al (2013) reported that average fruit flesh mass of four Rosa species ranged from 0.69 to 1.20 g. ŠINDRAK et al (2012) reported significant difference between fruit flesh mass of eight Rosa canina seedlings while average values varied from 1.31 to 1.94 g.…”

“…Previous research in Croatia (ŠINDRAK et al, 2012;TOMLJENOVIĆ et al, 2016;TOMLJENOVIĆ et al, 2019) and in the world (UGGLA et al, 2003according to NYBOM et al, 1996DE COCK et al, 2008;WERLEMARK, 2000;ERCIŞLI and EŞITKEN, 2004;) suggests the existence of variability of morphological and pomological traits, which is a good basis for the selection process of quality genotypes among species of this genus. Accordingly, it can be assumed that in Croatia, as well as in the investigated area of the continental part of Croatia, there is a significant in situ biodiversity between the species of the genus Rosa.…”

“…In a study of fruit growth properties of Rosa dumalis and Rosa jundzillii BESSER, DÖLEK and GÜNEŞ (2016) conclude that fruit development can be affected by ecological factors, genetics and breeding conditions. ŠINDRAK et al (2012) assumed that high variations in fruit mass among Rosa canina seedling were as a result of the influence of agro-ecological conditions and genetic variability. SOARE et al (2015) noted that fruit mass variations were due to divergence in site altitude and climatic conditions.…”