A kind of nitrogen and phosphorus efficient winter wheat variety breeding method

Abstract

The invention belongs to the field of agricultural breeding, and in particular relates to an efficient, accurate and systematic nitrogen-phosphorus-efficient wheat variety breeding method. Including the following steps: (1) Assemble the hybrid combination, and the obtained F 1 The generation seeds were planted in high-fertilization and low-fertilization treatment areas; (2) F 2 Under the low-fertilization treatment, the generation selects (3) F 3 Generations were simultaneously selected under high-fertilization and low-fertilization treatments; (4) F 4 Generation planting was selected under normal fertility level; (5) F 5 (6) Under the normal fertility level, select the strains participating in the formal experiment of yield-variety comparison, and at the same time, identify the nitrogen and phosphorus utilization characteristics of the selected strains; (7) ) According to the nitrogen efficiency index and phosphorus efficiency index, nitrogen efficient, phosphorus efficient and nitrogen phosphorus synergistically efficient strains were screened out. The method of the invention can quickly and accurately breed nitrogen and phosphorus high-efficiency wheat varieties, and can realize the accuracy of cultivating high-nutrient varieties, and greatly reduces the selection cost.

Description

technical field [0001] The invention belongs to the field of agricultural breeding, and relates to a winter wheat variety breeding method capable of improving the nitrogen and phosphorus utilization efficiency of winter wheat, in particular to an efficient, accurate and systematic nitrogen-phosphorus-efficient winter wheat variety breeding method. Background technique [0002] The traditional method of breeding nitrogen and phosphorus efficient wheat varieties is generally in the high generation of variety breeding (F 5 The nitrogen and phosphorus utilization characteristics of the above generations) were identified, and the high-generation strains were planted under the conditions of normal treatment, low nitrogen treatment and low phosphorus treatment, and the yield was measured at the mature stage, and the single plant per unit area was selected to measure the nitrogen and phosphorus in the aboveground part per unit area. content, and calculate the absorption and utilizat...

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Problems solved by technology

[0003] In order to solve the problems of low efficiency, long time-consuming and low precision in the existing breeding of high-efficiency nitrogen and phosphorus varieties, the present invention proposes a method for breeding winter wheat varieties with high nitrogen-phosphorus efficiency, which can quickly and accurately breed high-efficiency nitrogen and phosphorus Winter wheat varieties, and can achieve the accuracy of nutrient-efficient variety breeding, and greatly reduce the cost of selection

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