Schimacrenata crossbreeding method

Abstract

The invention discloses a schimacrenata crossbreeding method. The schimacrenata crossbreeding method comprises selecting forest stand and select trees, carrying out grafted seedling cultivation, dividing a select tree asexual system into 3-5 subsystems according to schimacrenata asexual system flowering periods comprising early, middle and later periods and according to schimacrenata select tree producing areas and flowering time, and carrying out hybrid seed production by a scheme comprising that breeding parents of each one of the subsystems are subjected to single crossing, a hybridized composition is determined and hybridization does not occur between subsystems so that schimacrenata seeds with a mature period of 2 years are obtained. Through hybrid seed production, a novel schimacrenata seed is produced so that a high-quality breed is obtained. According to different breeding parent combination, a fruit-setting ratio is 95%. The schimacrenata crossbreeding method provides a technical support for ecological forest planting.

Description

Technical field [0001] The invention belongs to the technical field of hybrid breeding of woody plants, and relates to a method for hybrid seed production of rare and excellent native broad-leaved tree species Schima superba, in particular to a method for cross breeding of Schima superba. Background technique [0002] Schima superba Gardn.et Champ (Schima superba Gardn.et Champ) is an evergreen tree of the Camellia family Schima superba with straight trunks, also known as lotus trees. The height of the tree is 20-30m, the diameter at breast height is 1m, and the leaves are oval to oblong. It is 10-12 cm long and 2.5-5 cm wide; the petiole is 1.4-1.8 cm long. The flowers are white, single axillary or short racemes at the top; peduncle 1.2 to 1 cm long, usually erect; sepals 5, with fine hairs on the edges; petals 5, obovate; most stamens; dense fine hairs at the base of the ovary. The capsule is nearly spherical, about 1.5 cm in diameter, 5-lobed, with woody skin. The seeds are ...

AI Technical Summary

Problems solved by technology

However, the research on the selection and genetic improvement of fine varieties of Schima superba started relatively late in China, and the breeding process is relatively backward. It is difficult to meet the large demand for good varieties in the construction of precious broad-leaved timber forests and ecological forests. It is necessary to strengthen the breeding and genetic improvement of Schima superba. Cultivate high-quality improved varieties, improve the level of improved varieties and productivity of Schima superba plantation

At present, the seeds used in production are still in the state of collecting and using general natural forest and artificial forest seeds. The purpose of hybrid seed production is to recombine the genetic material of hybrid parents to obtain new varieties that combine the excellent traits of both parents. But so far there is no report on the hybrid seed production method of Schima superba