Mechanized production of hybrid seeds by using combined parent strain hybridization crop

Abstract

The invention discloses a hybrid crop mechanized seed production technique which utilizes the combination parents, belonging to the cross-breading of the crops. The invention is characterized in that on the basis that the combination parent is gained by using current parent strain of the hybrid crop or selecting the systems in the same types and different growing periods, the mechanized sowing or grafting type is carried out according to proper row ratio of male parent and female parent; the harvest process is carried out after mature by respectively harvesting the male parent and female parent and by the synchronous and alternative operation; alternatively, a single harvester can respectively harvest the male parent and the female parent at the same time and ensure the hybrid seeds and the male parent seeds are separated from each other and not mixed together. The hybrid crop seed production technique of the invention meets the requirement that the florescences of the male parent and the female parent are encountered, realizes the mechanized operation during the production process, lightens the labor intensity, obviously reduces the seed production cost, quickens the process that the hybrid crops, more particularly, the hybrid rice crops are generalized and applied all over the world, especially for the developed countries, and prompts the global economical development.

Description

technical field [0001] The invention belongs to the technical field of agricultural hybrid breeding, and in particular relates to the mechanized seed production technology of hybrid crops using combined parents. Background technique [0002] With the support of the National 863 Program, major breakthroughs have been made in my country's heterosis utilization technology and high-efficiency seed production technology. Hybrid rice is a major scientific research achievement with independent intellectual property rights in my country, but the relatively backward seed reproduction technology has become a bottleneck restricting the further development of hybrid rice in my country. Developed a technical system suitable for mechanized seed production by cultivating 7A in the CMS line with brown chaff and color difference sorting technology; developed a new chemical male-killing technology, and realized large-area wheat hybrid seed production through the CHA approach , 364.35 kilogra...

AI Technical Summary

Problems solved by technology

[0014] 1. The similar growth period of the male parent and the female parent is the premise to ensure that the flowering period meets, so it is a necessary condition for the success of seed production. This is contrary to the inconsistency of the parental parental growth period of most strong dominant hybrid combinations in current production practice, so in To a large extent, it restricts the parent selection and utilization of strong dominant hybrid combinations with outstanding comprehensive performance

[0015] 2. In order to make the male parent or female parent of the seed production have the black glume trait, it is necessary to adopt the systematic breeding method of conventional artificial hybridization and the anther in vitro culture early generation stabilization method to transfer the black glume trait of Heiying 1 into the female parent or the male parent. In this method, on the one hand, the cycle is long, which often takes several years, which delays the breeding process; on the other hand, the unfavorable genes linked to the control genes of the black glume trait are transferred to the seed-producing parents, thereby weakening the superior performance of the hybrid combination

[0026] (1) During the seed production of the CMS line 7A with brown glumes and the restorer line with normal glumes, in the case that the duration from sowing to the first panicle of the parents is quite different, in order to ensure that the flowering stages of the parents meet, Only the traditional method of sowing and planting in stages can be adopted manually by the parents themselves, and it is impossible to realize mechanized sowing or planting operations

[0027] (2) After the maintainer line is pollinated when the sterile line is propagated, the maintainer line is killed by spraying Roundup, resulting in the loss of the available benefits of the sterile line breeding field

[0028] (3) The breeding of maintainer lines and sterile lines with brown glumes has become an indispensable link. The breeding cycle is long and the breeding process is slow, which is difficult to meet the needs of rice production for the renewal of hybrid combinations, and is not conducive to the rapid development of good traits. Aggregating and expanding genetic backgrounds