Normal view MARC view ISBD view

Experiences in the use of testers at Kasetsart University in Thailand

By: Aekatasanawan, C | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico) | Proceedings of the Asian Regional Maize Workshop Bangkok (Thailand) 5-8 Aug 2002.
Contributor(s): Srinivasan, G.|Zaidi, P.H.|Prasanna, B.M.|Gonzalez, F.|Lesnick, K [eds.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 2004Description: p. 176-189.ISBN: 970-648-116-8.Subject(s): Field experimentation | Genetic variation | Grain yield | Heterosis AGROVOC | Inbred lines | Methods | Testes | CIMMYT | Genotypes AGROVOC | Hybrids AGROVOCSummary: The objectives of this research were to compare S1, S1 testcrossed with low-(TC1) and high-(TC2) favorable gene testers methods in Caripeno DMR (S)C5 and Suwan 1(S)C10 populations for evaluating S1 lines, correlations among these methods, responses to selection, and general and specific combining ability of S3 lines. The testers of the TC1 and TC2 methods were Cycle 0 and the later cycle of the opposite population, respectively. Results, averaged from both populations, revealed that genetic variability among progenies were S1 > TC1, S1> TC2, and TC1 > TC2 by 2.4, 3.3, and 1.4 times for grain yield; and 2.0, 3.5, and 1.8 times for 14 agronomic traits, respectively. Correlation coefficients for grain yield were 0.521 for S1 and TC1 0.450 for S1 and TC2, and 0.498 for TC1 and TC2. The S1 method gave higher mean yield of the 10 S1 lines for high yield selection than those of the TC1 (13%) and TC2 (15%) methods. All of populations per se, interpopulation crosses, and testcrosses showed the same rank of responses to high yield selection; S1 > TC1> TC2. Compared to the inbred and hybrid checks for grain yield, the orders were TC1 (11) > S1 (10) > TC2 (9) for selecting high GCA-S3 lines, and S1 (22) > TC1 (21) > TC2 (4) for selecting significant S3 x S3 hybrids. In conclusion, the TC2 method was less efficient and the Si method was the most effective, inexpensive, and less time-consuming method.Collection: CIMMYT Publications Collection
Tags from this library: No tags from this library for this title. Log in to add tags.
    average rating: 0.0 (0 votes)
Item type Current location Collection Call number Copy number Status Date due Barcode Item holds
Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection Look under series title (Browse shelf) 1 Available L630601
Total holds: 0

The objectives of this research were to compare S1, S1 testcrossed with low-(TC1) and high-(TC2) favorable gene testers methods in Caripeno DMR (S)C5 and Suwan 1(S)C10 populations for evaluating S1 lines, correlations among these methods, responses to selection, and general and specific combining ability of S3 lines. The testers of the TC1 and TC2 methods were Cycle 0 and the later cycle of the opposite population, respectively. Results, averaged from both populations, revealed that genetic variability among progenies were S1 > TC1, S1> TC2, and TC1 > TC2 by 2.4, 3.3, and 1.4 times for grain yield; and 2.0, 3.5, and 1.8 times for 14 agronomic traits, respectively. Correlation coefficients for grain yield were 0.521 for S1 and TC1 0.450 for S1 and TC2, and 0.498 for TC1 and TC2. The S1 method gave higher mean yield of the 10 S1 lines for high yield selection than those of the TC1 (13%) and TC2 (15%) methods. All of populations per se, interpopulation crosses, and testcrosses showed the same rank of responses to high yield selection; S1 > TC1> TC2. Compared to the inbred and hybrid checks for grain yield, the orders were TC1 (11) > S1 (10) > TC2 (9) for selecting high GCA-S3 lines, and S1 (22) > TC1 (21) > TC2 (4) for selecting significant S3 x S3 hybrids. In conclusion, the TC2 method was less efficient and the Si method was the most effective, inexpensive, and less time-consuming method.

English

0501|AGRIS 0501|AL-Maize Program

Juan Carlos Mendieta

CIMMYT Publications Collection

There are no comments for this item.

Log in to your account to post a comment.
baner

International Maize and Wheat Improvement Center (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Monday –Friday 9:00 am. 17:00 pm. If you have any question, please contact us at CIMMYT-Knowledge-Center@cgiar.org

Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Lunes –Viernes 9:00 am. 17:00 pm. Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org