Diallel analyses for dry forage yield among some alfalfa cultivars

Document Type : Research Paper

Authors

1 Assoc. Prof., Department Plant Breeding and Biotechnology, Agricultural Faculty, Urmia University, Urmia, I.R.Iran Email: i.bernosi@urmia.ac.ir

2 Assist. Prof., Center of Agricultural Research and Natural Resources of West Azerbaijan, Agricultural Research, Education and Extension Organization (AREEO), Urmia, I.R. Iran

Abstract

DOR: 98.1000/1735-0891.1397.2.302.52.26.1578.1607

The objective of this study was to develop population hybrids by crossing five alfalfa
cultivars of different geographic origin (Ghareh Yonjeh, Hamedani and Mahalie-Esfahan from
Iran, Elchi from Turkey and Ordobad from Azerbaijan) and assessment of combining ability
among them using diallel analysis. A half diallel was performed during 2012 between the
selected cultivars. For each pairwise cross, ten plants were chosen at random to obtain F1
generation. Heterotic responses were determined by evaluation forage yield of the cultivars and
their 10 half-diallel hybrids in seeded plots that were harvested three times in each of 2 years
(2014 and 2015). Variation among crosses was attributed primarily to general combining ability
(GCA) effects. However, specific combining ability (SCA) effects were also significant. Midparent

heterosis ranged from 7.1% in the Elchi x Hamedani to -9.9 % in the Ghareh Yonjeh x
Mahalie-Esfahan and high-parent heterosis ranged from 3.4 % in the Elchi x Hamedani to 16.7%

Ghareh Yonjeh x Mahalie-Esfahan. Results indicated that Elchi cultivar could be
considered as a member of a potential heterotic group for adapted cultivars (Ghareh Yonjeh and
Hamedani) to the studied environment.

Keywords

References

 
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Iranian Journal of Rangelands and Forests Plant Breeding and Genetic Research
Volume 26, Issue 2 - Serial Number 52
December 2018
Pages 302-310

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