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3340

Increasing the Efficiency of Recurrent Selection for Yield in Maize

Article

Last updated: 01 Jan 2025

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Subjects

-

Tags

Crops and quality

Abstract

The objectives of the present study were to increase the efficiency of recurrent selection within the "Composite-21" variety of maize using selection index to increase the precession of the evaluation of S1-families. Ninety S1 families were evaluated in six sets, each set included 15 S1 families replicated three times. Data were collected for yield, yield components characters and agronomic characters to carry out six selection methods. One method is based on ear yield alone and the other five methods were based on selection index. Estimation of environmental (σ2e), phenotypic (σ2ph) and genotypic (σ2g) variances and broad -scense heritability (H %) were calculated for each trait to predict the genetic gain from different selection methods. Phenotypic and genetic correlations among traits were calculated to examine the possibility of indirect selection for yield using some characters which are highly correlated  with yield. Heritability estimates were intermediate (41-55%) for ear yield, 100-kernel weight and kernel depth and more than 70% for number of rows/ ear, plant and ear heights. The genetic correlations for yield with the other characters were in general intermediate.
Based upon the expected advance from selection, the expected gain which is coming from the indices ranged between (5.58-19.13%) comparing with the expected gain which is coming from yield alone (16.43%). So, the use of indices was slightly superior to selection based on yield alone. The actual improvement in yield is 9% for selection based on yield alone, 8% for selection index based on yield and all characters, 3% for the index based on yield and ear characters and 1% for the index based on yield and vigor characters. The predicted advance from selection was higher than the actual advance.

DOI

10.21608/asejaiqjsae.2017.3340

Keywords

Zea mays, Recurrent selection, selection index, S1 families, heritability

Authors

First Name

Mohamed

Last Name

M. El-Rouby

MiddleName

-

Affiliation

Department of Agronomy, Faculty of Agriculture (El-Shatby), Alexandria University

Email

-

City

-

Orcid

-

First Name

Mohamed

Last Name

H. El-Sheikh

MiddleName

-

Affiliation

Department of Agronomy, Faculty of Agriculture (El-Shatby), Alexandria University

Email

-

City

-

Orcid

-

First Name

Shaimaa

Last Name

M. Awad Allah

MiddleName

-

Affiliation

Department of Agronomy, Faculty of Agriculture (El-Shatby), Alexandria University

Email

-

City

-

Orcid

-

Volume

38

Article Issue

April-June

Related Issue

348

Issue Date

2017-06-01

Receive Date

2017-04-09

Publish Date

2017-06-01

Page Start

193

Page End

202

Print ISSN

1110-0176

Online ISSN

2536-9784

Article File

ASEJAIQJSAE_Volume 38_Issue April-June_Pages 193-202.pdf

PDF . 597.1kB

Link

https://asejaiqjsae.journals.ekb.eg/article_3340.html

Detail API

https://asejaiqjsae.journals.ekb.eg/service?article_code=3340

Order

5

Type

Original Article

Type Code

53

Publication Type

Journal

Publication Title

Alexandria Science Exchange Journal

Publication Link

https://asejaiqjsae.journals.ekb.eg/

MainTitle

Increasing the Efficiency of Recurrent Selection for Yield in Maize

Details

Type

Article

Created At

22 Jan 2023