Method of cultivating rose cultivars through distant backcross

Abstract

The invention provides a method of cultivating rose cultivars through distant backcross. According to the method, rosa multiflora, which is good in cold resistance, drought resistance and saline-alkaline tolerance, is hybridized with traditional roses through research, wherein a female parent A system is Rosa gugosacv. plena, and a male parent B system is Rosa kokanica Regel ex juz. After the hybridization, an offspring F1 which has the comprehensive characters of the traditional rose of the female parent A system and the target characters of the rosa multiflora of the male parent B system is obtained through the cultivating and screening process. The F1 is backcrossed with a recurrent parent A system for multiple times, and the offspring of the F1 is self-crossed for purification. Meanwhile, a new generation stable hybrid rose variety, which has comprehensive characters and target characters and is capable of continuously flowering over three seasons, is selected and obtained.

Description

technical field [0001] The invention belongs to the technical field of plant cultivation, and in particular relates to a method for cultivating rose varieties through distant backcrossing. Background technique [0002] The genus Rosa (Rosa L.) belongs to the Rosaceae Rosaceae. There are more than 200 species in the world, and 91 species are produced in China. Chinese rose, rose and Rosa are its representative plants. Roses are native to the Orient, but are now probably found all over the world, mainly in temperate regions. There are more than 100 different varieties of roses, including wild roses, and there are about 30,000 officially registered varieties of hybrids and varieties. [0003] At present, most roses are planted with traditional roses, which bloom in one season, have relatively poor resistance, low yield of essential oil, single fragrance type, low yield, and limited suitable growing areas. Therefore, developing new product rose is a technical problem to be sol...

AI Technical Summary

Problems solved by technology

From screening parental combinations to obtaining hybrid seedlings, one often has to experience pollination stigma abortion, underdeveloped seeds, difficulty in emergence of hybrids, unstable variety characteristics, easy degradation, and infertility of hybrid offspring, etc.

These factors have seriously affected the progress of hybrid breeding

There have been reports at home and abroad on the research on the compatibility of distant hybridization of roses, but the root cause of the incompatibility mechanism has not been clarified so far

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