Head Rice Yield of Some Domestic and Foreign Rice Varieties (Oryza Sativa L.) Grown in the Republic of Macedonia

Abstract

This paper presents the results of head rice yield research of rice varieties and genotypes grown in the Republic of Macedonia, conducted within the period 2009-2014. In the research, in total sixteen rice varieties and five genotypes were included, among which were the following: three Macedonian varieties (Biser 2, Prima riska and Montesa), three introduced Italian varieties, the most widely used in Macedonian rice production (Monticelli, R-76/6 and San Andrea), five newly introduced Italian varieties (Bianca, Galileo, Brio, Ellebi and Opale), five newly introduced Turkish varieties (Kiziltan, Gala, Halilbey, Gönen and Pasali) and five newly bred Macedonian rice genotypes (P1 × M, P2 × M, P × MM, MBL × M and MBL × MM). Laboratory milling (peeling or bleaching or processing) was performed on a paddy processing machine to determine the head rice yield and by-products of milling: brokens, brans and husks. According to the results obtained, the highest head rice yield (percent of whole grains after milling rough rice kernels) of the domestic varieties was achieved with Biser-2 (54.01%), while the lowest one was shown by Prima riska (49.38%). The highest head rice yield of the prevalent Italian varieties was 59,68% (Monticelli) and the lowest one was 43.35% (San Andrea). Regarding the newly introduced Italian varieties, the values of the head rice yield ranged from 35.4% (Galileo) to 64.46% (Ellebi). Among the Turkish varieties, Kiziltan showed the highest head rice yield (62,67%) and Gönen the lowest one (43.34%). In the newly bred Macedonian rice genotypes, the head rice yield ranged from 55.60% (P1 × M) to 63.77% (P × MM). The percentage of brokens, bran and husks (hulls) in all investigated varieties and genotypes varied in different years of production.

Morphological and grain characterısatıon of Macedonian weedy rice (Oryza satıva L.)

“…), and Pontederiaceae (Heteranthera spp. ), (Andreevska et al 2008). A specific problem in this region is the widespread of weedy rice-populations belonging to the Oryza sativa L. species exhibiting weedy characteristics, such as seed shattering (Delouche et al 2007) and dormancy (Vidotto and Ferrero 2000;Gu et al 2003) that negatively affect rice production (Pantone and Baker 1991;Ottis et al 2005;Xu et al 2017).…”