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Barley Genetics Newsletter 37:1-4 (2007) Dominance and recessiveness of parameters of Aluminum-resistance of barley F2 hybrids at different concentrations of stress factor E. M. Lisitsyn and I. I. Lisitsyna North-East Agricultural Research Institute, 166-а Lenin street, Kirov, 610007, Russia e-mail: edaphic@mail.ru Till now there is no uniform opinion in the scientific literature about number and type of action of genes coding barley aluminum resistance. For example, Rigin, Yakovleva (2001) considers, that it is controlled by two oligogenes, as a minimum, with possible action of genes with weaker effect. Other authors assume the control of the parameter by one dominant gene Pht [Stolen, Andersen, 1978], or gene Alp [Reid, 1971], both located on chromosome 4 [Minella, Sorrells, 1997]. Gourley et al [1990] concluded, that type of action of genes coding aluminum resistance in sorghum (additive, partially or completely dominant), depends not only on a researched genotype, but also on used Al concentration. Aniol [1995, 1996] has established, that when the concentration of aluminum in test solution is low (30-40 µМ), cereal cultures (wheat, rye) use mechanisms that block accumulation of aluminum in roots (for example, chelation of aluminum at the expense of exudation of organic acids by root system), at higher concentration of aluminum in root growth environment (200-300 µМ) the basic role is played by other physiological mechanisms of Al-resistance. Thus the author remarks [Aniol, 1997] that the aluminum resistance of wheat plants at a concentration of 296 µМ is controlled by 2 genes and at a concentration of 592 µМ aluminum resistance is controlled by three genes. He wrote, that genes located in D-genome of wheat, are expressed only at high Al concentration, and genes located on chromosome 5А are expressed at all studied concentrations. The aim of our research was to determine the influence of Al concentration on a direction and character of dominance of parameters of roots growth of barley F2 hybrid seedlings. Material and Methods The direct and reciprocal F2 hybrids of four selection numbers of barley (№№ 565-98, 889-93, 999-93 and 1030-93), bred in North-East Agricultural Research Institute (Kirov, Russia) were taken for the analysis. By results of the preliminary laboratory analyses the parental forms of these hybrids differed significantly on a level of Al-resistance that corresponded to the research aim. A level of Al-resistance (relative root length - RRL) was estimated under conditions of rolled culture on five-day barley seedlings according to the technique described earlier [Lisitsyn, 2000] by division of value of root length of each individual seedling in test treatment variant (0.5 and 1.0 mM of aluminum as sulphate salt, рН 4.3) on value of average root length of control variant (without the stress factor, рН 6.0). Each sample volume consists of 99- 105 seedlings in each treatment variant. Character of dominance for parameters of root growth of F2 hybrid plants was estimated by equation [Petr, Frey, 1966]: d = F2 - MP HP-MP 1
Page 1 and 2: Barley Genetics Newsletter Volume 3
Page 3 and 4: Instructions for contributors Volum
Page 5: Table of Contents Barley Genetics N
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Page 13 and 14: length was measured as the length o
Page 15 and 16: established map positions. The comb
Page 17 and 18: grow a cultivar late or early in th
Page 19 and 20: 2H and 3H were also indicative of g
Page 21 and 22: Figure 2. Genetic map of SM barley
Page 23 and 24: Figure 3. QTL likelihood maps for v
Page 25 and 26: Keller, M., Ch. Karutz, J. E. Schmi
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Page 29 and 30: Table 2. Cultivar-specific PCR prim
Page 31 and 32: 30 single crosses and 15 three-way
Page 33 and 34: Table 1. ANOVA (mean square) of tri
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Page 37 and 38: References Bhatnagar, V. K., Sharma
Page 39 and 40: Table 2. Promising crosses for seed
Page 41 and 42: ands across the leaves (Davis et al
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Page 45 and 46: alb 129 alb 130 alb 131 alb 132 alb
Page 47 and 48: Tigrina mutants tig 1 × tig 3 tig
Page 49 and 50: xan 31 × xan 32 xan 33 xan 35 × x
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AMENDMENT: When ambiguous (co-domin
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7. Inhibitors, suppressors, and enh
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