Abstract
Crops are often subjected to iron(Fe)-deficiency due to the limited solubility of this essential element in most neutral or basic soils. Developing cultivars with high efficiency in Fe utilization via breeding programs can provide solutions to this problem as a long term strategy. In the present study, to select inbred lines for breeding of maize with high efficiency in Fe utilization, we screened 123 inbred lines at the seedling stage by analyzing secretion pattern of phytosiderophores, a class of non-protein amino acids released by graminaceous species for Fe utilization, using high-performance liquid chromatography. One hundred and twenty three inbred lines were clustered into nine groups. The low PS secretion rate under Fe-sufficient condition and high PS secretion rate increment after Fe-deficiency treatment type were the ideal inbred lines for breeding of maize with high efficiency in Fe utilization.
Highlights
Iron (Fe) is one of the essential nutrients for plant growth, which plays important roles in many crucial metabolic pathways [1]
To select inbred lines suited to develop maize hybrids with high efficiency in Fe utilization, PS secretion patterns of 123 inbred lines were analyzed. These lines were clustered into nine groups based on PS secretion rates under Fe-sufficient condition and PS secretion rate increment after Fe-deficiency treatment
The variation range among different genotypes was from 1.786 ± 0.222 mg/(g dry root*8h) [mean ± standard deviation (S.D.), Dan340] to 19.695 ± 0.442 mg/(g dry root*8h) (LL0726-1)
Summary
Iron (Fe) is one of the essential nutrients for plant growth, which plays important roles in many crucial metabolic pathways [1]. It is the fourth most common element in the Earth’s crust, plants are often subjected to Fe-deficiency due to its low solubility especially in calcareous soils (about 30% of world’s cultivated soils) [2] [3]. (2014) Selection of Inbred Lines for Breeding of Maize with High Efficiency in Iron Utilization. This issue can be solved through soil improvement and foliage spray of Fe fertilizer, it is a real economic burden. Developing cultivars with high efficiency in Fe utilization via breeding programs can provide solutions to this problem as a long term strategy
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