Zbornik - Društvo genetičara Srbije

134 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE IV-Pos-17
Subotica, 30. novembar - 4. decembar 2004.
GENETIÈKA VARIJABILNOST LUCERKE (Medicago sativa L.) ZA
PRODUKCIJU I VANIJE MORFOLOŠKE OSOBINE
Jasmina Radoviæ, Z. Lugiæ, D. Sokoloviæ i Tanja Vasiæ
IIP «SRBIJA», Centar za krmno bilje, Kruševac
Cilj rada je odreðivanje obima i strukture genetièke varijabilnosti poboljšane populacije
lucerke. Istraivanja su obavljena u Centru za krmno bilje u Kruševcu. Potomstvo je
dobijeno ruènim ukrštanjem sluèajno odabranih biljaka po proceduri koju su za
ksenogamne biljke predloili Comstock i Robinson. Ogled je postavljen po Nested
dizajnu I sa setovima u okviru ponavljanja. Prouèavano je ukupno 48 half-sib (HS)
potomstava podeljena u dva seta. U toku trogodišnjeg perioda iskorišæavanja na
pojedinaènim biljkama su praæene sledeæe osobine: prinos suve mase po biljci, visina
biljaka, broj izdanaka po biljci, broj internodija po stabljici, debljina stabljike i odnos list:
stablo.
Rezultati ukazuju na visoku varijabilnost ispitivanih osobina u sve tri godine istraivanja.
Najveæe vrednosti za skoro sve osobine su zabeleene u drugoj godini istraivanja.
Utvrðeni intervali variranja ukazuju na visok genetièki potencijal ispitivane populacije.
Najveæa varijabilnost je dobijena za prinos suve materije po biljci (CVg 25%) i broj
stabljika (CVg 30%), dok je nii koeficijent varijacije zabeleen za visinu biljaka (9%),
broj internodija (5%) i ostale praæene osobine. Varijabilnost pojedinaènih biljaka u
okviru HS potomstava je takoðe bila visoka. Utvrðen je jak uticaj visine biljaka i broja
stabljika na prinos suve materije. Rezultati ukazuju na znaèajnu genetièku varijabilnost
unutar populacije.
GENETIC VARIABILITY FOR PRODUCTION AND MORFOLOGICAL
TRAITS OF ALFALFA (Medicago sativa L.)
The aim of this investigation is to determined genetic variability for production and
morfological traits of alfalfa. The experiment was realized in the Center for forage crops
in Krusevac. The progeny used for examining genetic variability were obtained by hand
polination of randomly chosen plants from population according to a procedure for
xenogam plants suggested by Comstock and Robinson (1948). There have been studied
48 half -sib (HS) progenies separeted in two sets. During three years period the following
caracteristic have been examined on spaced plants: dry matter yield per plant, plant
height, number of steam per plant, number of internodium on main steam, width of steam
and leaf- steam ratio.
Results showed a high variability for examined traits in all three years of investigation.
The higher values for almost all traits was noticed in second years of utillization. Determinated
levels of mean values and intervals of variability indicate high genetic potential
of evaluated population for all examined traits The highest variability was obtained for
dry matter yield (CVg 25%) and number of steam (CVg 30% ), while the lower coefficient
of variation was noticed for number of internodium (5%) and plant height (9%).
Variability of individual plants within HS progeny was higher for all traits than variability
between HS. The strong correlation was assessed for dry matter yield and plant
height. The high variation of examined traits represent on significant genetic variability
inside the population.