A kind of parent selection method for weak gluten wheat breeding

Abstract

The invention provides a parent selection method for breeding of weak gluten wheat. The method comprises the following steps: selecting n good weak gluten wheat varieties, preparing n(n-1) / 2 hybrid combinations according to the Griffing diallel crossing method II, separately planting each combination in a region and sparsely planting enough plants to obtain F1; planting genotypes of each F1 seed and parent seeds, altogether n(n-1) / 2+n genotypes, in a field according to random block permutation and harvesting seeds F2 in each region; determining protein content of sample grains and retention capacity of sample aqueous solutions; and analyzing general combining ability and special combining ability of protein content and aqueous solution retention capacity of F2 samples according to the model I of the Griffing method 2 and evaluating the utilization values of the parents and the combinations according to the general combining ability and special combining ability. According to the invention, parent and F2-generation seeds are used to research two quality characters closely related to the quality of weak gluten wheat and parents with optimal general combining ability are evaluated and selected according to the value of combining ability of protein content and aqueous solution retention capacity of each parent seed, so a theoretical basis is provided for reduction in blindness in parent selection of weak gluten wheat and for cultivation of new varieties of weak gluten wheat.

Description

technical field [0001] The invention belongs to the technical field of crop breeding methods, in particular to a parent selection method for weak-gluten wheat breeding. Background technique [0002] Weak gluten wheat refers to wheat with soft grains, low protein content, weak gluten strength, good extensibility, and suitable for making biscuits, pastries, and southern soft steamed buns. According to the "China Wheat Quality Zoning Program" and "Regional Layout Planning for Superior Agricultural Products", only the Jianghuai Plain in the middle and lower reaches of the Yangtze River is suitable for large-scale planting of high-quality weak-gluten wheat. The core area for the construction of gluten wheat advantageous industrial belt. Therefore, cultivating high-quality, high-yield and weak-gluten wheat varieties is the main breeding goal in the middle and lower reaches of the Yangtze River. [0003] In the past 10 years, a number of scientific research and breeding units in ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, such as the lack of resources in the selection and breeding of weak-gluten wheat varieties in the Huainan wheat region of Jiangsu, and the poor quality stability of existing varieties, and provide a method for selecting excellent parents in weak-gluten wheat breeding. recipe

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