Process for selecting and breeding forage grass maize strain by using maize sibling species

Abstract

The invention relates to a method for method for using corn to breed forge grass corn kind. Wherein, it uses corn autocopulation system and tetraploid grown to cross and backcross to obtain corn-tetraploid grown corn substitution system; then crosses replace system and tetraploid grown corn to obtain the forge grass corn, which has high yield and high quality.

Description

Technical field [0001] The invention relates to a breeding method of forage corn, in particular to a method for selecting forage corn varieties by using corn related species. Background technique [0002] With the development of my country’s society and economy, animal husbandry has changed from a sideline business to a main business, and it accounts for more than 50% of the output value of large-scale agriculture. The forage industry, which is the basis of animal husbandry, has also increased its status in production and has become a planting industry. An important part of industrial restructuring. [0003] In the past half-century, the feeding of herbivorous livestock in my country has been almost entirely in the situation of “relying on the nature to raise livestock and grazing throughout the year”. The contradiction between forage supply and demand has become increasingly prominent. There are more than 75% of the livestock in my country in winter and early spring every year. ...

AI Technical Summary

Problems solved by technology

[0006] Tetraploid perennial maize (Zea perennis, 2n=40) is a wild relative of maize (Zea mays, 2n=20). Advantages (Tang Qilin et al., 2004; Li Dongyu et al., 2001), but the lodging resistance is weak; using it to hybridize with corn can combine the excellent characteristics of the two, and it is expected to breed a breakthrough new variety of forage grass

However, the genetic relationship between maize and tetraploid perennial maize species is far away, and the hybrid affinity is low, resulting in a very low hybrid seed setting rate between them (about 5% to 8%), and the hybrid seed germination rate is also low ( Tang Qilin et al., 2006)

Seriously limit the possibility of introducing beneficial genes of tetraploid perennial maize species into maize to breed and promote new forage maize

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