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2014, vol. 51, iss. 3, pp. 166-169
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Inheritance of the grain number per spike in diallel cross of 5x5 bread wheat cultivars
Nasleđivanje broja zrna po klasu u dialelnom ukrštanju 5x5 hlebne pšenice
aUniversity of Novi Sad, Faculty of Agriculture, Department of Genetics and Plant Breeding, Serbia
bInstitute of Field and Vegetable Crops, Novi Sad, Serbia
email: [email protected]
Project: Modern breeding of small grains for present and future needs (MESTD - 31066)
Abstract
This study examined the mode of inheritance and the influence of genes on the grain number per spike in F1 generations, in 5x5 half diallel crosses of wheat cultivars. The results of the combining ability analysis did not indicate significant differences among the parents for general combining ability (GCA) and crosses for specific combining ability (SCA) for the grain number per spike. The GCA/SCA ratio tilted in favour of the SCA in this trait, which indicated the preponderance of non-additive gene, i.e. dominant effects in the genetic control of grain number per spike. Components data of genetic variance and regression analysis indicated a greater role of the dominant component in the grain number per spike inheritance. The regression line intercepts the Wr axis below the origin in F1, indicating over-dominance over an average of all arrays.
Sažetak
U radu je ispitan način nasleđivanja i efekat gena za osobinu broj zrna po klasu kod F1 generacije u dialelnom ukrštanju pšenice (5x5). Analizom varijanse kombinacionih sposobnosti nisu utvrđene značajne razlike u opštim (GCA) i posebnim kombinacionim sposobnostima (SCA). Odnos GCA/SCA je ukazao da su u nasleđivanju broja zrna po klasu preovladali neaditivni efekti gena. Rezultati analize komponenata genetičke varijanse i regresione analize su ukazali na veći značaj dominantne komponente u nasleđivanju broja zrna po klasu. Regresionom analizom ustanovljen je superdominantan način nasleđivanja broja zrna po klasu u F1 generaciji, s obzirom na to da je linija regresije sekla ordinatu ispod koordinatnog početka.
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