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192254

Drought tolerance indices and path-analysis in long staple cotton genotypes (G. barbadense)

Article

Last updated: 25 Dec 2024

Subjects

-

Tags

Agronomy sciences

Abstract

Drought stress is a serious abiotic factor adversely affects cotton yield and fiber properties. The objectives of this study were to screen several genotypes of cotton belong to Gossypium barbadense L. for drought tolerance, study drought indices, correlations, and path-coefficient analysis. Fourteen long staple cottons cultivated, and obsolete cultivars were screened for drought tolerance at normal irrigation and drought stressed experiments for two years. Mean squares indicated significant (p ≤ 0.01) differences among genotypes in separate and combined analysis. The effect of years showed significant (p≤ 0.05 to p≤ 0.01) differences in most cases. The interaction of genotypes by years were significant for all traits except few cases. The reduction % caused by drought stress in SCY/P ranged from 31.44 to 39.39 with an average of 33.93. Among ten tolerant indices STI, MP, GMP, HM and DI could be considered the best tolerant indices to detect both of tolerant and susceptible genotypes. The correlation of SCY/P under normal irrigation was high with LY/P, Lint %, NB/P, LI and BW, moderate with NS/B and upper half mean length, and low with DFF, Pressely index and negative with Micronaire reading. However, the picture was different under drought stress, in which drought affected lint rather than seeds. The direct and indirect effects of SCY/P components varied greatly under both environments, and LY/P, NB/P and NS/B should be considered as selection indices under normal irrigation, NB/P and NS/B under stress when selection practiced for SCY/P.

DOI

10.21608/svuijas.2021.81692.1119

Keywords

correlation, Drought indices, Drought tolerance, G. barbadense, Path-analysis

Authors

First Name

E.E.

Last Name

Mahdy

MiddleName

-

Affiliation

Agronomy Department, Faculty of Agriculture Assiut University, Assiut Egypt

Email

ezzat.mahdy@agr.au.edu.eg

City

-

Orcid

-

First Name

S.F.

Last Name

Abo-Elwafa

MiddleName

-

Affiliation

Agronomy Department, Faculty of Agriculture Assiut University, Assiut Egypt

Email

-

City

assiut

Orcid

-

First Name

G.H.

Last Name

Abdel-Zahir

MiddleName

-

Affiliation

Cotton research institute, Agricultural Research Center, Egypt

Email

gamalabdel-zahir@yahoo.com

City

-

Orcid

-

First Name

N.I.

Last Name

Abdelrahman

MiddleName

-

Affiliation

Cotton research institute, Agricultural Research Center, Egypt

Email

noureldeen@yahoo.com

City

-

Orcid

-

Volume

3

Article Issue

3

Related Issue

24104

Issue Date

2021-07-01

Receive Date

2021-06-21

Publish Date

2021-07-01

Page Start

177

Page End

191

Print ISSN

2636-3801

Online ISSN

2636-381X

Link

https://svuijas.journals.ekb.eg/article_192254.html

Detail API

https://svuijas.journals.ekb.eg/service?article_code=192254

Order

15

Type

Original Article

Type Code

1,132

Publication Type

Journal

Publication Title

SVU-International Journal of Agricultural Sciences

Publication Link

https://svuijas.journals.ekb.eg/

MainTitle

Drought tolerance indices and path-analysis in long staple cotton genotypes (G. barbadense)

Details

Type

Article

Created At

22 Jan 2023