Genetic variability and selection criteria of some sunflower genotypes under different pollination methods | Genetska variabilnost in selekcijski kriteriji nekaterih genotipov sončnice pri različnih metodah opraševanja

anglais. To determinate self-compatible genotypes for increasing autogamy yielded, the ten sunflower genotypes were sown under four pollination methods i.e., open-, self-, hand- and sib-pollinations in a randomized complete block design replicated thrice at Kafr-El-Hamam Agricultural research Station, Sharkia Governorate, Agricultural Research Center, Egypt during 2018 and 2019 summer seasons. Significant variation existed for different pollination treatments, genotypes and their interactions for all studied traits. Among the treatments, open pollination followed by sibbing one was regarded as the best pollination treatment for head diameter, number of filled seeds per head, percentage of seed setting , kernel to hull ratio, seed mass per plant, seed yield per fed and seed oil content. Autogamy studies revealed that ‘L120’ followed by ‘L92’ and ‘L880’ recorded higher proportion of autogamy and self-compatibility. Preferred improvement of seed mass per plant may be achieved through selecting genotypes having the largest head diameter, bigger number of filled seeds per head, the highest proportion of seed setting and the heaviest seed, kernel and hull mass as proven by high phenotypic and genotypic coefficient of variation and high heritability coupled with high genetic advance (as % of mean) as well as correlation and path analyses at both phenotypic and genotypic levels.

slovène. Za določitev samokompatibilnih genotipov in povečanje samooploditve je bilo posejanih deset genotipov sončnice z različnimi načini opraševanja in sicer: navskrižno opraševanje, samo opraševanje, ročno opraševanje in opraševanje znotraj starševskih linij. Poskus je bil zasnovan kot naključni popolni bločni poskus s tremi ponovitvami na Kafr-El-Hamam Agricultural research Station, Sharkia Governorate, Agricultural Research Center, Egypt, v poletnih rastnih sezonah 2018 in 2019. Za vse preučevane lastnosti so se pokazale značilne razlike glede na način opraševanja, izbrane genotype in njihove interakcije. Med obravnavanji sta se navskrižno opraševanje in opraševanje znotraj starševskih linij izkazali kot najboljši način opraševanja glede na premer koška (glave) sončnic, število polnih zrn na košek, odstotek nastavka semen, razmerja med jedrci in luščinami, maso semen na rastlino, pridelek semena na fedan in vsebnost olja v semenu. Preučevanje avtogamije je odkrilo, da so imeli genotipi po vrstnem redu ‘L120’, ‘L92’ in ‘L880’ največji delež samooplodnje in samokompatibilnosti. Zaželjeno izboljšanje mase semena na rastlino bi lahko dosegli z izborom genotipov, ki imajo največji premer koška, večje število polnih semen na košek, največji nastavek semen, največjo maso semen, jedrc in luščin kot je bilo dokazano z velikim fenotipskim in genotipskim koeficientom variabilnosti in velike dednosti povezano z velikim napredkom v dedovanju (kot poprečni odstotek) kot tudi z analizami korelacije med preučevanimi lastnostmi na fenotipski in genotipski ravni.