Plant Genetic Research
Scientific Journal

Investigation the Heritability and Gene Effects on Yield and Some Agronomic Traits of Maize (Zea mays L . )

Document Type : Original Article

Authors

Pariya Dorri 1
Saeed Khavari Khorasani 2
Mahmood Vali Zadeh 3
Parisa Taheri 4

1 Department of Plant Breeding, Payam Noor University, Mashhad, Iran

2 Seed and Plant Improvement Department, Khorasan Razavi Agricultural and Natural Resources Research and Education Center, ARREO, Mashhad, Iran

3 Assistant Professor, Payam Noor University, Mashhad, Iran

4 Associate Professor, Plant Pathology, Ferdousi University, Mashhad, Iran

https://doi.org/10.29252/pgr.1.2.33
Abstract
Selection of breeding methods for plant genetic improvement largely depends on the genetic basis of selected traits. This research was carried out in order to study the genetic parameters of phenological and morphological traits , yield and yield components of maize using generation mean analysis of inbred lines derived from crosses KE72012 (P1) × K1263 / 1 (P2) inbred lines . This study was conducted at Torough Station of Khorasan Razavi Agriculture and Natural Resources Research Center, Mashhad, Iran, during 2012 . Six maize generations include BC 2 , BC 1 , F 2 , F 1 , P 2 and P 1 was evaluated in a randomized complete block design (RCBD) with three replications . Analysis of variance showed higher dominance gene effects than additive effect s . Average dominance gene effects (H / D) ½ in all measured traits, showed complete and over dominance gene effects indicating the importance of dominance effect in studied traits . A simple additive -dominance model performed using weighted least square analysis. Results showed not it’s adequacy for traits, indicating the importance of epistatic effects in contro lling genetic variations . Broad sense heritability for all measured traits in crosses KE72012 (P1) × KE1263 / 1 (P2) ranged between 0.10 to 0.88 and the range of narrow sense heritability in this cross was between 0.02 to 0.59 . Estimation of number of genes controlling grain yield showed that the one to five genes are involved in KE72012 (P1) × K1263 / 1 (P2).

Keywords

Additive effect
Dominance effect
Weighted leas t square
Broad sense heritability
Narrow sense heritability
Plant Genetic Research
Volume 1, Issue 2 - Serial Number 2
December 2014
Pages 33-42

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