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Detailed Analysis and Explanation of Dog Breeding Theory
Basically speaking, there are three main schools of breeding theory, namely Inbreeding, Linebreeding, and Out-crossing / Out-breeding. However, note that no matter which breeding theory is used, the dogs must be of the same pure breed for it to count as purebred dog breeding. Before breeding, you should know: before deciding which theory to use for dog breeding, you should pay attention to
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Breeding and Utilization of the Japonica Hybrid Rice Hanyou 1027
Hanyou 1027 is a new japonica hybrid rice combination bred by the institute in 1985 by crossing the Hanfeng male-sterile line with the T1027 restorer line. In 1986, at the institute's experimental farm, on 1.62 mu the yield was 581.7 kg per mu, an increase of 11.8% over Hanfeng. In 1988, on 1.2 mu at the institute, the yield was 604.6 kg per mu, an increase of 22.0% over Xiushui 04. As a single-season rice in Shanghai, the combination takes 153-156 days; as a double-season rice in Changsha and Hangzhou, 122-142 days.
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Important breakthrough made in hybrid japonica rice breeding
On the 18th, the reporter learned from the Shanghai Academy of Agricultural Sciences that agricultural scientists in Shanghai have made a breakthrough in hybrid japonica rice breeding in the Yangtze River Basin. Following the acquisition of the first hybrid late japonica rice restorer line in the Yangtze River Basin to obtain national plant variety protection rights, the first southern hybrid late japonica rice combination to pass national variety approval has also been bred. At present, a series of strongly heterotic combinations have become an important support for the "seed source" of hybrid japonica rice in the Yangtze River Basin. Researchers from the Crop Breeding Institute of the Shanghai Academy of Agricultural Sciences used intermediate materials between indica and japonica subspecies as "bridge parents"
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Breeding and Application of Tianfengyou 269, a High-Yield, High-Quality, Multi-Resistant Hybrid Indica Rice
1 Breeding Process Tianfengyou 269 (formerly named Yanyou 269) is a new high-yield, high-quality, multi-resistant three-line hybrid indica rice combination bred in 2002 by the Institute of Agricultural Sciences of the Coastal Region of Jiangsu, by crossing Tianfeng A, developed by the Guangdong Academy of Agricultural Sciences, with the restorer line Yanhui 269, which was self-bred by our institute. The self-bred restorer line Yanhui 269 was produced in the summer of 1995 by making a cross with Yanhui 559 as the female parent and Yanhui 469 (an intermediate material of our institute) as the male parent, obtaining 26 hybrid seeds, which were brought to Sanya, Hainan in the winter of the same year for planting
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Breeding Techniques and Management Methods for Adult Snakehead Fish
Snakehead fish is a valuable freshwater fish of high economic value, known as the "treasure among fish." It is highly nutritious and contains a large amount of protein, more than that found in chicken and beef. From a nutritional standpoint, snakehead fish is a premium health food that is nutritionally complete and has delicious meat. Breeding adult snakehead fish refers to the production process of raising fingerlings into food fish in small water bodies such as ponds, tanks and cages. Artificial snakehead fish farming includes two types: extensive polyculture and intensive monoculture. Extensive polyculture means raising them together with the Four Major Chinese Carps and other fish in a fishing pond. Intensive mono
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What are the breeding characteristics of foxes? Learn in one article
The lifespan of a fox is 10-14 years, the reproductive lifespan is six to eight years, and the optimal breeding lifespan for captive breeding is 2-5 years. Foxes are animals that breed once a year, and the breeding season is in spring. The reproductive organs of foxes undergo obvious seasonal changes under the influence of the photoperiod. Research has proven that artificial light control can change the breeding cycle of foxes and the maturation period of their fur. Most male foxes can participate in mating during the breeding season. However, there are also a few old foxes or young male foxes participating in mating for the first time that have no mating ability. Female foxes
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How to raise meat dogs? Selecting good breeding dogs is key
To succeed in dog breeding, you must select excellent breeding dogs. In general terms, a meat dog refers to an F1 or F2 crossbred dog produced by crossing a large purebred dog with a local dog, or a dog bred by crossing F1 and F2 generations back together. The selection of the purebred male dog is especially important. Currently, the purebred male dogs selected in China include the Tibetan Mastiff, Great Dane, Saint Bernard, and others. Among them, the F1 generation of the Tibetan Mastiff is active and fierce, not suitable for group raising; the F1 generation of the Great Dane has a low meat yield. The Saint Bernard, however, as a sire line for meat dog breeding, has the following advantages: fast growth rate, adult male dogs 75-100
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Successful breeding of the new upland rice variety Xiahan 51
This achievement is an early-maturing japonica-type upland rice with strong drought resistance, high yield, and average grain quality. It is susceptible to rice blast and resistant to narrow brown leaf spot, and is suitable for upland cultivation. Plant height is 86.8 cm, the plant type is relatively compact, the leaves are erect at the seedling stage, the leaf color is dark green, and growth is steady; growth is vigorous in the mid-to-late stages, with relatively high tillering ability and productive tiller rate, and relatively strong lodging resistance. Panicle length is 15.1 cm, total grains per panicle are 88-90, seed-setting rate is 90%, and 1000-grain weight is about 25 g. Disease resistance: leaf blast grade 3, neck blast grade 7, narrow brown leaf spot grade 1. Main grain quality indicators
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Breeding Methods and Key Keeping Techniques for the White Cloud Mountain Minnow
Morphological Characteristics of the White Cloud Mountain Minnow The White Cloud Mountain minnow, also known as the Baiyun Mountain fish, Tang fish, red-tailed fish, and colorful golden-line fish, belongs to the Cyprinidae family and originates from Guangdong, China. The White Cloud Mountain minnow was first discovered in the Baiyun Mountain in the northern suburbs of Guangzhou, Guangdong Province, China, hence the name Baiyun Mountain fish. The White Cloud Mountain minnow is about 3-4 cm long, with a spindle-shaped, slender body that is slightly laterally compressed, a small head, large eyes, and a bluntly rounded snout. The back of the fish is tea-brown with a slight blue tinge, the belly is silvery white, the dorsal fin and caudal fin are bright red, the tips of the pelvic fins are yellow, and the center of the tail is also red.
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Detailed Explanation of Breeding Techniques and Processing Methods for the Gold-edged Ground Beetle
The gold-edged ground beetle is an excellent variety, with fast reproduction and growth, relatively simple rearing methods, low artificial breeding costs, and good sales returns. 1. Preparation of rearing site and clay jars. After old rural houses are cleaned and disinfected, any flat place that can provide shade and shelter from rain is suitable for placing clay jars to rear gold-edged ground beetles. Clay jars generally have an outer diameter of 49 cm and a height of 58 cm. Level the ground, place a water basin, place the clay jar on the water basin, then place 3-4 layers of bricks inside the clay jar (leaving gaps) to absorb water and regulate humidity, then
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