Method for breeding new germplasms of wheat including multi-ear wheat, large-ear wheat and large-grain wheat

Abstract

The invention belongs to the field of creating and breeding of germplasms, and discloses a method for breeding new germplasms of wheat including multi-ear wheat, large-ear wheat and large-grain wheat. The method disclosed by the invention is characterized by specifically comprising the following steps: (1), breeding a new strain of large-ear wheat, namely No.1 large-ear wheat; (2), breeding a new strain of large-ear wheat, namely R11-2; and (3), breeding new germplasms of wheat including multi-ear wheat, large-ear wheat and large-grain wheat. According to the method disclosed by the invention, 16 new germplasms of multi-ear wheat, large-ear wheat and large-grain wheat are bred; the ear number per strain is averagely 13.03; the ear length is beyond 10 cm; wheat belongs to long-ear wheat; the ear number is 18.91-20.87; the weight of a thousand of wheat is averagely 42.05 g; the sum sigma (+ / -CK)% (super-contrast sum 4185) of four total character mutation of the ear number per strain, the ear length, the ear number and the weight of a thousand of wheat is 59.13-189.88%.

Description

technical field [0001] The invention relates to a breeding method for new germplasm of wheat, in particular to a breeding method for new germplasm of wheat with multiple ears, large ears and large grains, and belongs to the field of germplasm innovation and breeding. Background technique [0002] Wheat is one of the main crops in my country. The yield directly affects the food safety of our country. Therefore, breeding high-yield wheat varieties is an eternal research topic for breeders, and germplasm innovation is the key to achieving a breakthrough in variety yield. Wheat is a group crop, and its yield is determined by three factors: number of spikes per spike, number of grains per spike, and thousand-grain weight. Therefore, many wheat breeders have devoted themselves to the study of the three factors: number of spikes per spike, number of grains per spike, and thousand-grain weight. Ruili et al. (2009) proposed to focus on increasing the number of grains per panicle and ...

AI Technical Summary

Problems solved by technology

[0003] However, the common problems existing in the current wheat germplasm resources are: resources with multiple spikes do not have large spikes, resources with large spikes do not have many grains, resources with multiple spikes do not have large grains

That is, materials with a high spike rate per plant tend to have small ears and low thousand-grain weight; while materials with large spikes have many grains per panicle and high thousand-grain weight, but the total grain number per panicle is low due to the low spike rate per plant.

As far as any variety is concerned, the three factors of wheat yield are highly coordinated and unified, and restrict each other, and the use of cultivation measures to increase any factor will lead to a decrease in the other two factors.

[0004] Hexaploid triticale has multiple spikes, large spikes, and multiple grains, but the interspecific hybridization failed to produce the desired line with large spikes, multiple grains, and large grains

However, genetic methods are used to improve the above-mentioned types of resources, to prepare combinations of multiple panicles × large panicles and multiple grains × large grains, to aggregate traits, and to breed offspring with multiple panicles, multiple grains, and large grains. The three factors of multiple panicles, large ears, and large grains are difficult Coordination, focus on one thing and lose another, there has been no emergence of breakthrough germplasm resources

Images