Genetika 2017 Volume 49, Issue 2, Pages: 511-528
https://doi.org/10.2298/GENSR1702511K
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Evaluation of reciprocal cross populations for spike-related traits in early consecutive generations of bread wheat (Triticum aestivum L.)
Kutlu Imren (Eskisehir Osmangazi University, Faculty of Agriculture, Department of Biosystem Engineering, Eskisehir, Turkey)
Balkan Alpay (Namik Kemal University, Faculty of Agriculture, Department of Field Crops, Tekirdag, Turkey)
Korkut Kayıhan Z. (Namik Kemal University, Faculty of Agriculture, Department of Field Crops, Tekirdag, Turkey)
Bilgin Oguz (Namik Kemal University, Faculty of Agriculture, Department of Field Crops, Tekirdag, Turkey)
Baser Ismet (Namik Kemal University, Faculty of Agriculture, Department of Field Crops, Tekirdag, Turkey)
Breeding effort on increasing grain yield of wheat will incessantly continue
because it is indispensable product. Obtaining the genetic information such
as genotypic variation, heritability, genetic advance is the fundamental
components of these studies. It is important that the maternal effects are
put forward throughout successive generations because of genotypic and/or
environmental effects as far as variation. This research was conducted to
investigate changes of reciprocal crosses throughout successive generations
and determine selection criteria for high yield in early generations. For
this purpose, the populations were analyzed with regard to genotypic and
phenotypic variation coefficient, heritability, genetic advance and
Unweighted Pair Group Method (UPGMA) cluster analysis for real crosses,
reciprocals and all genotypes separately. According to the results,
heritability and genetic advance values of traits investigated were highly
varied throughout successive generations among real crosses, reciprocals and
all genotypes. This finding indicated that non-additive gen effects or
epitasis played a role in inheritance of all traits. Dissimilarity of
crosses than their reciprocals indicated variation of successive generation.
Dissimilarity value of each parent differed as generation progresses
according to combination created. This condition suggested that there were
maternal effects in this population throughout successive generations. Grain
weight per spike, spike harvest index and spike density had high direct and
indirect effects on the grain yield at all of three generations, it proved
that these traits can be a selection criterion for early generations. Sana
was the best parent and ‘Bezostaja x Krasunia’ and ‘Krasunia x Pehlivan’
were best performance in most of traits at all generations.
Keywords: cluster analyses, early generation, genotypic effects, reciprocal crosses, spike traits