Photoperiod sensitive type sudangrass hybridization breeding method

Abstract

The invention discloses a photoperiod sensitive type sudangrass hybridization breeding method, and belongs to the technical field of forage variety breeding methods. Materials with parents or at least the female parent with photoperiod sensitive characteristics are selected for performing hybridization breeding, wherein according to F0, parent heading and blooming are induced in winter in Sanya, Hainan with 12 h or shorter day length, and hybridization grouping is completed; according to F1, authentication selection conditions are the same as that of F0; according to F2, photoperiod sensitive single plants are selected on the spring sowing condition in the North, and transplanted to Sanya, Hainan by adopting a rhizome propagation method for regrowth; regeneration stems of the plants of F2 are used for inducing blooming and seeding on the short-day condition in Sanya, Hainan, and the photoperiod sensitive characteristic verification is achieved by observing the time of a heading period; according to F3 to F5, repeated selection continues to be performed by means of the sunshine conditions of North-Sanya, Hainan; according to F6, seed reproduction is stabilized, and generations F7 and F8 are evaluated; the photoperiod sensitive sudangrass novel germplasm can be obtained. The novel germplasm bred through the breeding method enriches a sudangrass germplasm resource gene pool.

Description

technical field [0001] The invention belongs to the technical field of pasture variety breeding methods. In the process of hybridization and breeding, aiming at the problem that the photoperiod-sensitive Sudangrass cannot flower and bear fruit at all under the conditions of spring sowing in the north, and cannot obtain offspring seeds, a photoperiod is invented. A hybrid breeding method for sensitive Sudangrass, a batch of new germplasm of photoperiod-sensitive Sudangrass can be obtained by using this breeding method, which enriches the gene pool of Sudangrass germplasm resources; It can maintain vegetative growth for a long time, maintain a good level of feed quality, prolong the utilization period of stems and leaves, and more meet the purpose of forage utilization. Background technique [0002] Sudan grass (Sorghum sudanense (Piper) Stapf.) is an annual high-quality forage grass belonging to Sorghum family Poaceae. It has the characteristics of mowing resistance, wide ada...

AI Technical Summary

Problems solved by technology

Moreover, there is no report on the hybrid breeding method and selection criteria of the photoperiod-sensitive Sudangrass