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GrainGenes Reference Report: ASG-20-32

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Reference	ASG-20-32
Title	Analysis on the combining ability and heritability of the spike characters in wheat
Journal	Acta Agriculturae Shanghai
Year	2004
Volume	20
Pages	32-36
Author	Yao J Yao G Yang X Qian C Wang S
Abstract	Combining ability, gene effect and genetic composition for the length of main spike, fertile spikelets, sterile spikelets, kernels of main spike, kernels of spikelet, kernels per spike, 1000-grain weight and kernel weight per spike were studied in 8 wheat cultivars (Ningmai No. 8, Ningmai No. 9, Yangmai 158, Yangmai No. 9, Gaoyou 503, Ji'nan 17, Zheng 9023 and Yumai 18) by Griffing's complete diallel crossing model II. The inheritance of sterile spikelets was mainly controlled by additive genes. The additive and non-additive gene effects were significant in the inheritance of the other spike characters, although the additive gene effect was predominant. The genotype x environment effect on the spike characters was not significant, and the narrow heritability of the spike characters was rather higher except that of kernel weight per spike. Thus, early-generation selection was effective. Among the 8 parents, the general combining ability for the spike characters of Ningmai No. 9 was superior. Ningmai No. 8 and Yangmai No. 9 could be used as the core parents to improve the number of kernels per spike, and Yangmai 158 could be used as an adaptation parent in breeding for yield potential. The relative values of specific combining ability for the 7 spike traits in Ningmai No. 8 x Zheng 9023, Ningmai No. 9 x Zheng 9023 and Yangmai No. 9 x Gaoyou 503 were all positive; thus, these crosses could be considered as the key cross combinations for breeding for high yields
Keyword	adaptation [ Show all 18 ]

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