Селекционна оценка по съдържание на фотосинтетични пигменти на образци власатка (Festuca ssp.) и ежова главица (Dactylis glomerata L.)
Анелия Кътова • Желязко Вълчинков • Анна Илиева
Институт по фуражните култури, Плевен; ул. ”Генерал Владимир Вазов” 89
Резюме
The aim is to determine the content of photosynthetic pigments (PP) of fescue (tall, red
and meadow) and cocksfoot collections and to make a selection of stable genotypes with
a high content of total pigments. During the period 2015-2017 in the Institute of Forage
Crops (IFC) -Pleven, two collection nurseries were studied in non irrigated conditions on
leached black soil, by block method in 2 replications of a total of 14 numbers accessions,
with 50 individual plants each: fescue - 8 (3 – tall fescue, 3 - red and 2 meadow, 5 varieties
and 3 ecotypes, from Bulgaria, Romania and Belgium); cocksfoot - 6 (3 varieties
and 3 ecotypes from Bulgaria and Romania). The content of photosynthetic pigments is
determined by fresh plant samples by the method of Zelenski and Mogileva (1980) and
presents average, minimum, maximum values, standard deviations by growths (cuts) and
years, total average for the collection. According to Frances and Kannenberg (1978), a
breeding assessment was performed through the distribution of genotypes versus the average
values for photosynthetic pigments and the coefficient of variation. Photosynthetic
pigments content has been found to vary depending on plant species, genotype (variety or ecotype, ploidy level, maturity group) and seasonal variations (growths and years) as well
as growing conditions. The highest total PP content is reported in 2017 on average 335.48
mg / 100g fresh weight (fw) and in 2016 - 333.30 mg / 100g fw for cocksfoot followed
by different fescue. Cocksfoot genotypes with a higher PP content were selected from the
average annual value for the collections during both years of study: Dabrava, Magda and
Topolovgrad and genotypes tall, meadow and red fescue Adela, Merifest, Transilvan, Capriora,
Ravnogor and Sadovo with higher PP content.
