Breeding method of basic nutritional cytoplasmic male sterile line of stingless purple flowers of hibiscus cannabinus

Abstract

The invention relates to a breeding method of a basic nutritional cytoplasmic male sterile line of stingless purple flowers of hibiscus cannabinus. The method comprises the following steps: carrying out test cross by taking an existing cytoplasmic male sterile line of the hibiscus cannabinus as a female parent and a stingless basic nutritional purple material of the hibiscus cannabinus as a male parent, selecting first generation of test cross plants as a sterile line; carrying out saturated backcross on a corresponding stingless basic nutritional purple material of the hibiscus cannabinus as a recurrent male parent; and finally breeding the basic nutritional cytoplasmic male sterile line of the stingless purple flowers of the hibiscus cannabinus, wherein the comprehensive characters are consistent with those of the male parent and represent cytoplasmic male sterility and stable sterility, and the recurrent male parent is a corresponding maintainer line.

Description

technical field [0001] The invention specifically relates to a method for selecting a thornless basic vegetative cytoplasmic male sterile line of kenaf, belonging to the field of crop genetics and breeding. Background technique [0002] Fujian Province is one of the three major jute kenaf breeding and seed retention bases in the country. It has good natural light and temperature conditions and is known for its excellent seed quality. However, kenaf is a frequent outcrossing crop, which is an insect-mediated flower, and the outcrossing rate can reach more than 30%. This kind of purification caused great difficulty. The purity of the kenaf male sterile line is the key to ensure the purity of the hybrid kenaf seed, so the breeding of the purple corolla male sterile line that is easy to identify and remove impurities in field production is of great significance to improve the purity of the hybrid kenaf seed. In addition, the kenaf varieties widely promoted in my country have t...

AI Technical Summary

Problems solved by technology

In addition, the kenaf varieties that are widely promoted in my country have small spines on the stems and petioles, and the whole calyx of the capsule is covered with dense white hairs, which brings great pain to the field operations and seed harvesting of hemp farmers.

In order to alleviate the pain of the skin in the production process of hemp farmers, as early as the 1940s, the Uzbek Experimental Station of the former Soviet Union carried out grafting and hybridization of kenaf and rose hemp in order to create a new thornless variety, but no high-yield thornless kenaf was selected. According to reports on the application of new varieties in production, Fujian Agriculture and Forestry University adopted mutagenesis technology and successively bred new thornless kenaf varieties Jinguang No. 1 and Jinguang No. 2 in 2005. However, the growth period of the above two varieties is short and the fiber yield is slightly low. There are certain limitations in production application