Method for creating new germplasms of macadimia nuts

Abstract

The invention discloses a method for creating new germplasms of macadimia nuts, relating to a method for creating new germplasms of macadimia nuts by irradiating gemmiferous seeds of macadimia nuts through 60 Co-gamma rays. The method disclosed by the invention comprises the following steps: seeding mature seeds of fresh macadimia nuts in a sand bed that the width from germination accelerating to cracking is more than 1 mm; discarding seeds, bud points of which protrude shells, and uncracked seeds; irradiating gemmiferous seeds, the cracking degrees of which are proper, by using 60 Co-gamma rays, the dosage of which is 10-130 Gy; after irradiating, continuously seeding into the sand bed to continuously sprout and grow; observing morphological changes of mutagenesis seedlings, such as plant height, stem thickness and blade distortion; and obtaining new germplasms of macadimia nuts, and fixedly planting in a land. The method disclosed by the invention is capable of rapidly and effectively creating a large number of new germplasms of macadimia nuts, overcoming the germplasm resource shortage actuality of macadimia nuts in China and expanding the germplasm resources of macadimia nuts.

Description

technical field [0001] The present invention relates to a kind of germplasm creating method, specifically a method through 60 A method of germinating seeds of macadamia nuts irradiated with Co-γ rays to create new germplasm of macadamia nuts. technical background [0002] Macadamia spp. is an evergreen tree of the genus Macadamia F.Muell of the family Proteaceae. It is native to the subtropical rainforests of southeastern Queensland and northern New South Wales, Australia. It was introduced in the late 19th century. To Hawaii, USA, and began large-scale commercial planting in Hawaii after 1948. Since the late 1970s, my country has introduced and tried to plant macadamia nuts. It is currently distributed in Yunnan, Guangdong, Guangxi, Hainan and other hot-spot provinces, but the main commercial plantation is still in Yunnan. [0003] Due to the relatively short time for the introduction and cultivation of macadamia nuts in China, the current production mainly uses the bred...

AI Technical Summary

Problems solved by technology

[0004] 60 Since Co-γ rays were applied to the field of plant mutation breeding in the last century, they have been used in the breeding of many staple crops and some economic crops such as fruit trees, vegetables and flowers, and have achieved remarkable results. However, due to the special nature of macadamia structure, will 60 The application of Co-γ-ray irradiation to germinate seeds of macadamia nuts for germplasm innovation has not been reported at home and abroad