Selecting and breeding method of polyploidy novel mulberry tree breed

Abstract

The invention discloses a selecting and breeding method of a polyploidy novel mulberry tree breed. The breeding method comprises the following steps: implementing artificial hybridization and chromosome induction of polyploidy and other modes by selecting mulberry tree diploid hybridized mulberry seeds or hybridized seed mulberry sapling disease-free plants as materials; selecting out bud variation and branches the shape of which are similar to the polyploidy or plants by excellent plant, single plant selection and system selection; carrying out simple bud grafting on branch break bud variation the shape of which is similar to the polyploidy or plants in a primary selection garden; carrying out microscopical examination on the selected polyploidy single plants; establishing a system selection garden after determining that the single plants are polyploidy; and breeding a mulberry tree polyploidy novel breed by establishing product test gardens and parent gardens. The novel breed has extremely-high quality, ultrahigh yield and wide applicability; and in the actual production, a mulberry tree breed with ultrahigh yield matched with early growth, middle growth and late growth mulberry can be developed and bred, adapts to the requirement of pluralized and multiple silkworm breeding production all the year around on mulberry breeds and has obviously-improved mulberry yield, mulberry quality and other economic characters.

Description

technical field [0001] The invention relates to a method for breeding new plant varieties, in particular to a method for breeding new polyploid mulberry varieties. Background technique [0002] Mulberry leaves are the only natural feed for silkworms. Therefore, breeding and cultivating mulberry improved varieties has always been the pursuit goal of breeders and cultivators. At present, the improved mulberry varieties cultivated in production are almost all conventional diploid varieties. As the excavation and utilization of diploid local varieties is almost limited, the artificial hybridization between diploid varieties is limited by genetic resources. It is difficult to breed high-yielding varieties with excellent leaf quality. According to the requirements of high-efficiency agriculture, producers urgently need to cultivate high-quality mulberry varieties with super high yields to significantly increase economic benefits. Therefore, in order to breed super mulberry varie...

AI Technical Summary

Problems solved by technology

However, cultivation practice has proved that most of the more than 10 artificial triploid varieties currently used in production have not reached the super-high yield level, and some have obvious defects.