Inheritance of tolerance to zinc deficiency in barley
Date
2003
Authors
Genc, Y.
Shepherd, K.
McDonald, G.
Graham, R.
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Journal article
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Plant Breeding, 2003; 122(3):283-284
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Y. Genc, K. W. Shepherd, G. K. Mcdonald, R. D. Graham and J. Leon
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Abstract
Barley (Hordeum vulgare L.) is often grown on alkaline zinc (Zn)-deficient soils where reductions in yield and grain quality are frequently reported. Currently, the use of Zn-based fertilizer along with Zn-deficiency-tolerant genotypes is considered the most thorough approach for cropping the Zn-deficient soils; however, developing or breeding genotypes with higher Zn efficiency requires a good understanding of the inheritance of tolerance to Zn deficiency. This study was conducted to determine genetic control of this trait in barley. Two parental cultivars (‘Skiff’, moderately tolerant; and ‘Forrest’, sensitive), 185 F₂ plants, and 48 F₂-derived F₃ families from this cross were screened to determine inheritance of tolerance to Zn deficiency using a visual score of deficiency symptoms. The segregation ratios observed indicated that greater tolerance to Zn deficiency in ‘Skiff’ compared with ‘Forrest’ at the seedling stage is controlled by a single gene with no dominance. The results also indicate that visual scores are useful for genetic analysis of tolerance to Zn deficiency.
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© 2003 Blackwell Verlag, Berlin