Stability analysis of maize planting across the paddy and maize fields in the dry season of Thailand

Name: Ratha Pha

LCSH: Kasetsart University -- Theses. M.S. (Agricultural Research and Development) 2022

Classification :.LCCS: SB191.M2

LCSH: Kasetsart University. Faculty of Agriculture at Kamphaeng Saen -- Theses

LCSH: Corn -- Breeding

LCSH: Corn -- Field experiments

LCSH: Corn -- Yields

Abstract: In the maize breeding process, varieties trial in multi-environments is necessary before promoting to farmers. This experiment's objective was to identify high yield and stable varieties in the dry season of the paddy and maize fields to advise farmers for using suitable varieties for their locations. In this study, four new hybrid varieties, namely Suwan 5720, Suwan 5731, Suwan 5819, and Suwan 5821 and six commercial varieties as check varieties, namely Nakhon Sawan 3, Nakhon Sawan 4, Nakhon Sawan 5, CP639, S7328, and Pac139 from the public and private sectors, were used to evaluate grain yield. The experiments were conducted in a randomized complete block design (RCBD) with four replications in Saraburi, Chai Nat, Nakhon Ratchasima, and Nakhon Pathom provinces. Three stability methods, Eberhart and Russell, AMMI, and GGE, were used to analyze yield stability. Combined analysis of variance over five locations showed a significant difference in varieties × locations on the grain yield. Based on the Eberhart and Russell method, CP639 (9.06 t/ha), Suwan 5821 (8.58 t/ha) and Nakhon Sawan 5 (8.19 t/ha) had regression coefficients close to 1 (bi≈1) and deviations from regression close to 0 (S2 di≈0) indicating high grain yield stability. On the other hand, the PC1 of AMMI method of S7328, Nakhon Sawan 5, Suwan 5821, Suwan 5819 and Suwan 5720 had scores close to 0 (PC1≈0), meaning high stability and they had high grain yields of about 9.57, 8.19, 8.58, 8.48 and 8.87 t/ha, respectively. The Eberhart and Russell method consistently expressed that Suwan 5720 and Suwan 5819 were suitable for the maize field conditions the same as the AMMI method. The GGE method also presented CP639, S7328, Suwan 5720, Suwan 5819 and Suwan 5821 were more desirable genotypes that performed high grain yield stability in over locations. Moreover, the AMMI and GGE methods consistently indicated Suwan 5819, Suwan 5720, Suwan 5821 and S7328 performed higher stability and grain yield than others. Therefore, the AMMI and GGE methods can indicate more efficiency than the Eberhart and Russell method to identify stable hybrid varieties. In summary, Suwan 5821 was consistently identified as the more stable variety in all methods and mainly suitable for the irrigated paddy fields whereas, Suwan 5720 and Suwan 5819 are suitable varieties for the maize fields of Thailand.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Choosak Jompuk

Role: Thesis Advisor

Name: Peeranuch Jompuk

Role: Thesis Co-Advisor

Created: 2022

Modified: 2025-06-24

Issued: 2025-06-24

วิทยานิพนธ์/Thesis

application/pdf

URL: http://www.lib.ku.ac.th/KUthesis/2565/ratha-pha-all.pdf

CallNumber: SB191.M2.R38

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Agricultural Research and Development

Grantor: Kasetsart University

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