ESTIMATION OF GENETIC PARAMETERSAND COMBININGABILITY FOR YIELD AND YIELD COMPONENTSIN BREADWHEAT

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HASANI M.; SAEIDI GH.; REZAEI A.

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Journal: Journal of Water and Soil Science Year:621 | Volume: | Issue: Page(s): 171-179

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Title

ESTIMATION OF GENETIC PARAMETERSAND COMBININGABILITY FOR YIELD AND YIELD COMPONENTSIN BREADWHEAT

Author(s)

HASANI M. | SAEIDI GH. | REZAEI A. | Issue Writer Certificate

Keywords

COMBINING ABILITY

YIELD COMPONENTS

BREAD WHEAT.

Abstract

A diallel analysis of eight BREAD WHEAT.(Ttriticum aestivum L.) cultivars was conducted to detennine genetic parameters and the type of genetic control for yield and YIELD COMPONENTS. The parents and their FI hybrids were evaluated in a randomized complete block design with 3 replications. General and specific COMBINING ABILITY effects were estimated by the method 2 of the Griffings model I, and the genetic parameters were estimated by the Jinks-Hayman method. According to the analysis of variance, the variances of parents and crosses were significant for all of the traits, except for the fertile tillers per plant in parents and harvest index in crosses. The variance of GCA was significant for almost all of the traits. GCA to SCA ratio indicated a large additive effects for all the traits, except for the number of fertile tillers, grain yield per plant and biological yield. Darab and Chamran cuItivars were the excellent general combiners for days to heading. However, Falat for plant height, Arvand for number of fertile tillers, spike length and grain weight per spike, Qods and Arvand for spikeletes per spike, Falat and Arvand for grain yield per plant and Qods and Arvand cultivars for biological yield were the best general combiners. Based upon the Jinks-Hayman method, the average degree of dominance for grain weight per spike, 1000- grain weight, grain yield per plant and biological yield indicated that these traits might be controlled by over dominance effects and other traits by partial dominance. The correlation between Yr and (Wr + Vr) for the flag leaf length, spikeletes per spike, grains per spike and1000-grainweight indicated that recessive allels enhanced these traits. But dominant allels had their contribution to enhance other traits. The narrow-sense heritability for grain yield per plant (4%) and biological yield (14%) and harvest index (37%) was lower. However, for other traits it was more than 50%. Therefore, it can be inferred that indirect selection of grain yield through selection for YIELD COMPONENTS such as spikeletes per spike, grains per spike and grain weight per spike with high heritability and correlation with grain yield can be more effective.

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APA: Copy

HASANI, M., SAEIDI, GH., & REZAEI, A.. (2005). ESTIMATION OF GENETIC PARAMETERSAND COMBININGABILITY FOR YIELD AND YIELD COMPONENTSIN BREADWHEAT. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), 9(1), 171-179. SID. https://sid.ir/paper/528716/en

Vancouver: Copy

HASANI M., SAEIDI GH., REZAEI A.. ESTIMATION OF GENETIC PARAMETERSAND COMBININGABILITY FOR YIELD AND YIELD COMPONENTSIN BREADWHEAT. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES)[Internet]. 2005;9(1):171-179. Available from: https://sid.ir/paper/528716/en

IEEE: Copy

M. HASANI, GH. SAEIDI, and A. REZAEI, “ESTIMATION OF GENETIC PARAMETERSAND COMBININGABILITY FOR YIELD AND YIELD COMPONENTSIN BREADWHEAT,” WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), vol. 9, no. 1, pp. 171–179, 2005, [Online]. Available: https://sid.ir/paper/528716/en

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