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Qitai Uses Embryo Transfer Technology to Breed New Red Deer Varieties
Applying embryo transfer technology to the breeding of Tianshan red deer will cause a sensation in China's wildlife conservation community. On December 18, 2003, **Ma Mingkui, director of the Qitai Forest Farm, pointed to the red deer at the red deer breeding farm and told reporters: "No. 366, No. 66, and No. 399, these 3 red deer are all pregnant." This work began in September 2003, and a total of 13 red deer underwent embryo transfer. They are all red deer from the Qitai Forest Farm red deer breeding farm. This farm is also China's only Tianshan red deer germplasm protection and breeding base. Tarim
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The Complete Guide to Silkworm Breeds: Get to Know Common Silkworm Varieties
Silkworm breeds are broadly divided into three categories: 1. Univoltine silkworm breeds. Depending on the breed, the silkworm (Bombyx mori) produces only one generation within a year and then lays diapause eggs; these are called univoltine silkworm breeds. Such breeds develop slowly, take many days to complete their life cycle, consume a large amount of mulberry leaves during the larval stage, and have larger bodies and cocoons with the highest silk yield, but they are physically weak and not suited to hot, humid climatic conditions, making them suitable for rearing in temperate regions. 2. Bivoltine silkworm breeds. Those that produce two generations within a year, that is, the first generation lays non-diapause eggs and the second generation lays diapause eggs, are called bivoltine silkworm breeds. Such breeds
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What are the green and eco-friendly fishery drugs? Introduction to several commonly used varieties
Quicklime, table salt, and the like, although not specialized fishery drugs, are effective for preventing and treating aquatic diseases, and they pose no threat to the environment, with no drug residue problems. Quicklime: regularly splashing quicklime into the aquaculture water body can not only reduce the occurrence of many diseases, but also provide the calcium element essential for aquaculture organisms, which is especially important for crustacean aquaculture. Method of use: choose quicklime that has not weathered; for pond clearing and disinfection use 150-200 kg per mu; for disease prevention and treatment, generally 5-9, use once about every 20 days, for a water depth of 1
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Classification of Koi Varieties and Detailed Explanation of Their Main Characteristics
Through continuous crossbreeding, improvement and selective breeding, koi have now been developed into more than one hundred varieties. Japanese koi are mainly divided into 13 categories according to their colors, markings and scale distribution. 1. Kohaku koi: the base color of the body surface is silvery white, inlaid with changing red markings. 2. Taisho Sanke koi: the base color of the fish body is snow white, with crimson and jet-black markings emerging. 3. Utsuri koi: the fish body has black as its base color, with triangular markings that are either white, red or yellow. 4. Showa Sanke koi: the fish body
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What varieties of freshwater angelfish are there? A detailed guide to common species classification
1. Common Angelfish Scientific name: pterophyllum scalare English name: Angelfish Native to the waters from the central Amazon River to the Peru and Ecuador region, it is the original species from which today's general artificially improved angelfish breeds are derived. In its scientific name, pterophyllum means "as soft and light as a feather," while scalare describes its body stripes as being like a ladder. Apart from breeding, there are no obvious external sexual characteristics; the male's external genital organ is pointed, while the female's is
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A brief introduction to new mulberry and silkworm varieties, explained in one article
1. Nongsang No. 12: A new mulberry variety bred by the Sericulture Research Institute of the Zhejiang Academy of Agricultural Sciences in 1984 through artificial sexual hybridization. Main traits: compact crown, many shoots, long and straight branches, thick leaf flesh, dark green leaf color, sprouting earlier than Heye Bai, fast growth, strong adaptability. Regional trial results: leaf yield per mu 1867 kg, 18.73% higher than the control Heye Bai, significantly higher than the control; cocoon shell weight per 10,000 silkworms 7 kg, 8.03% higher than the control Heye Bai, extremely significantly higher than the control; resistance to yellowing-type
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Detailed Introduction to the Classification and Common Varieties of Softshell Turtles
Introduction to the Classification and Common Varieties of Softshell Turtles With the improvement of people's living standards and the growth of market demand at home and abroad, softshell turtles have gradually moved from hotels, restaurants and eateries into ordinary households. As a nutritious food, softshell turtles' dietary therapy and medicinal therapy functions can meet the needs of consumers at different levels. Market demand has stimulated production, and China's softshell turtle farming industry has developed rapidly, with the scale of farming continuously expanding and output increasing accordingly. Large-scale farming urgently needs a large number of softshell turtle hatchlings. Due to the rapid development, the breeding of seedlings, the classification, distribution and basic biological research of softshell turtles, as well as hatchling cultivation, species identification and disease prevention in farming production, cannot adapt to the needs of production development. Aquaculture operators and merchants in our province have purchased many softshell turtle hatchlings through different channels from abroad, Taiwan, China and other provinces in the mainland. Because these hatchlings come from different sources, their seed stock quality is unclear and it is hard to tell the genuine from the fake. Some farmers and aquaculture operators have paid a lot of "tuition fees," causing losses of varying degrees to production. Therefore, studying the classification and common varieties of softshell turtles and breeding superior softshell turtle varieties with good germplasm are urgent issues that must be solved for the sustainable development of the softshell turtle farming industry.
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New silkworm varieties successfully bred in Hubei
The new silkworm varieties "Ecan 3" and "Ecan 4", bred by the Cash Crop Research Institute of the Hubei Academy of Agricultural Sciences (postcode: 430070, tel: 027-87389436), recently won first prize in the Hubei Provincial Science and Technology Progress Awards. The robust autumn-use variety Ecan 3, compared with Hubei's current leading autumn-use variety Huanghe x Zhaoxia: strong resistance, with a unified larval-pupal survival rate of over 92%; high yield, with cocoon production of 33.95 kg per sheet, an increase of 9.94%; excellent silk quality, with a cocoon shell rate of 24.83%, a single cocoon silk length of 1150 m
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Successful breeding of new silkworm varieties in Hubei Province
The newly bred silkworm varieties "Ecan 3" and "Ecan 4" were recently awarded the first prize of the Hubei Provincial Science and Technology Progress Award. The robust autumn-use variety Ecan 3, compared with the main autumn-use variety currently promoted in Hubei Province, Huanghe x Zhaoxia: strong resistance, with a unified larval-pupal survival rate of over 92%; high yield, with cocoon production of 33.95 kg per sheet, an increase of 9.94%; excellent silk quality, with a cocoon shell rate of 24.83%, a single cocoon silk length of 1150 m, a reelable silk length of 941 m, and a silk yield of 17.88%, increases of 8-1
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What Kind of Fish Is Salmon? A Full Analysis of Origins, Varieties and Characteristics
What is salmon? To answer this question, we must first clarify the origin of the name "salmon." According to research, the Chinese term "sanwenyu" was first proposed in Hong Kong, China and Taiwan, China, as a transliteration of the English name salmon, because the English pronunciation of salmon sounds similar to "sanwen," while the standard Chinese translation of salmon should be "damahayu" or "guiyu." Salmon is not a taxonomic name for fish, but a commercial name for certain salmonid or salmon-trout species. To qualify as salmon, its muscle must be firm and elastic
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