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Manifestation of Heterosis and The Role of The Genetic Parameters Associated with It for Some Vegetative Traits in Squash (Cucurbita pepo, L.)

Article

Last updated: 01 Jan 2025

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Subjects

-

Tags

Crop genetics and breeding

Abstract

The main objectives of this investigation were to determine the amounts of heterosis versus the mid-parents and the better parent, nature of gene action and heritability in both broad and narrow senses. Seven squash varieties belong to the species (Cucurbita pepo, L.), were crossed to obtain 42 F1,1r hybrids according to a complete diallel crosses mating design.
The results revealed that the mean squares of genotypes which included seven parental varieties and their F1,1r hybrids were highly significant for all vegetative traits. The results also cleared that the mean values showed that no specific parent was superior for all vegetative traits.
The results indicated that the parents P1 and P6 seemed to be the best combiner for vein length (V.L.cm); number of leaves per plant (No.L./P.); leaf area (L.A.cm2); fresh weight per plant (F.W./P.g) and dry weight per plant (D.W./P.g). Meanwhile, the GCA effects were found to be significant and positive for mostvegetative traits. The parental varieties P3, P6 and P7 were the best combiners for the ratio of chlorophyll in leaves (Chl.).
The estimates of heterosis versus mid-parents showed highly significant values for all studied traits. The estimates of heterosis versus better parent showed highly significant values for most vegetative traits. The results showed the importance of general and specific combining abilities. GCA was larger than their corresponding estimates of SCA for vegetative traits. Reciprocal effects (r) were significant for most studied traits. Estimation of genetic parameters showed that the additive genetic variance was very important for most studied traits. The inheritance of these traits was mostly governed by additive genetic variance rather than non-additive and cytoplasmic genetic factors. In the same time, the estimates of heritability in broad sense were larger in magnitudes than their corresponding values in narrow sense.

DOI

10.21608/asejaiqjsae.2014.2611

Keywords

squash, Hybrids, Heterosis, combining abilities and heritability

Authors

First Name

A. H.

Last Name

Abd El-Hadi

MiddleName

-

Affiliation

Dept. of Genetics, Faculty of Agric. Mansoura University, Egypt.

Email

-

City

-

Orcid

-

First Name

El-Adl,

Last Name

A. M.

MiddleName

-

Affiliation

Dept. of Genetics, Faculty of Agric. Mansoura University, Egypt.

Email

-

City

-

Orcid

-

First Name

Horeya

Last Name

M. Fathy

MiddleName

-

Affiliation

Vegetables Breeding Department, Horticulture Res. Inst. (HRI), ARC, Giza, Egypt.

Email

-

City

-

Orcid

-

First Name

MOHAMED

Last Name

ABDEIN

MiddleName

-

Affiliation

Biology Dept., Fac., of Arts and Science- Rafha, Northern Border Univ., Saudi Arabia,91431 Vegetable Breeding, Horticulture Inst., ARC, Giza, Egypt. 12619

Email

abdeingene@yahoo.com

City

GIZA

Orcid

0000-0001-8922-6089

Volume

35

Article Issue

JULY-SEPTEMBER

Related Issue

488

Issue Date

2014-09-01

Receive Date

2014-07-22

Publish Date

2014-09-30

Page Start

190

Page End

202

Print ISSN

1110-0176

Online ISSN

2536-9784

Article File

ASEJAIQJSAE_Volume 35_Issue JULY-SEPTEMBER_Pages 190-202.pdf

PDF . 209.2kB

Link

https://asejaiqjsae.journals.ekb.eg/article_2611.html

Detail API

https://asejaiqjsae.journals.ekb.eg/service?article_code=2611

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

Manifestation of Heterosis and The Role of The Genetic Parameters Associated with It for Some Vegetative Traits in Squash (Cucurbita pepo, L.)

Details

Type

Article

Created At

22 Jan 2023