Two Pairs Of New Silkworm Varieties Approved By The State

Recently, good news came from the seed industry management department of the Ministry of agriculture and rural areas that the new silkworm varieties "Huakang 2" and "Huakang 3" bred by the researcher team of Xu anying, Institute of sericulture, Jiangsu University of science and technology, have passed the examination and approval of the national livestock and poultry genetic Committee and obtained the national variety approval certificate.

It is understood that the new silkworm variety "Huakang No.2" takes Qiufeng and Baiyu, which are the most widely used summer and autumn varieties in the Yangtze River Basin and the north of the Yangtze River, as parents. The main resistance gene is introduced, and then the parents are backcrossed for many times to restore economic traits. Then, one male and two females are used to realize the homozygous fixation of disease resistance dominant major gene and the simultaneous detection of resistance Bombyx mori nuclear polyhedrosis virus gene was efficiently introduced into the target variety to breed a practical variety with high resistance and stable inheritance of resistance to blood type purulent disease. The variety is strong, easy to raise, strong resistance to high temperature and humidity, high resistance to Bombyx mori nuclear polyhedrosis virus (more than 1000 times higher than Qiufeng × Baiyu); it is suitable for breeding in the Yangtze River Basin and the north of the Yangtze River, and also suitable for early spring, spring, mid autumn and late autumn in South China. It is the first summer and autumn seed to fight pyogenic disease in China. Its breeding and popularization solved the biggest problem in the production of silkworm industry in summer and autumn in China. The variety was approved by Guizhou crop variety Approval Committee in 2013, Guangxi Zhuang Autonomous Region crop variety Committee in 2016, and Henan sericulture variety Committee in 2017.

"Huakang No.3" is a new purulent silkworm variety with excellent economic characters, Jingsong and Haoyue as breeding parents, adopting the same method as Huakang 2. This variety has the excellent quality of cocoon silk of Jingsong × Haoyue, and its ability to resist pyogenic disease is increased by more than 1000 times. It has the characteristics of strong and good breeding, high quality and high yield. It is suitable for rearing in the vast silkworm areas in the Yangtze River Basin and north of the Yangtze River; Huakang No.3 has excellent silk quality and high disease resistance, which makes it the best raw material cocoon base reserve variety in China. It can greatly improve the quality of raw silk and promote the sustainable development of sericulture industry. This variety was approved by Sichuan silkworm variety Approval Committee in 2018.

According to Xu anying, two pairs of new silkworm varieties, Huakang No.2 and Huakang No.3, have outstanding performance, distinctive characteristics and excellent quality. Their breeding has enriched the structure of silkworm varieties in China. At present, they have been popularized and applied in some silkworm regions of China, and exported to Uzbekistan, Azerbaijan and other central and Western Asian countries, and have been accepted by local silkworm breeding farms, sericulture farmers and cocoon and silk enterprises Welcome to the industry. Through the national variety approval, it will provide a broader market prospect for the promotion and application of new varieties, and play an important role in promoting the brand building of China's cocoon and silk industry, the construction of high-quality cocoon base and the "belt and road" Cooperation Initiative.