Breeding method of new meat sheep variety

Abstract

The invention relates to the technical field of animal breeding. The invention provides a breeding method of a new variety of meat sheep, which comprises the following steps: (1) taking Tibetan sheep as a male parent and small tailed han sheep as a female parent, and hybridizing to obtain an F1 generation; (2) taking Tibetan sheep as a male parent, selecting high-quality ewes from the F1 generation as a female parent, and hybridizing to obtain an F2 generation; (3) selecting high-quality ewes from the F2 generation as female parents by taking the Tricel sheep as male parents, and hybridizing to obtain an F3 generation; and (4) selecting high-quality ewes and high-quality rams from the generation F3, and carrying out cross-crossing fixation. According to the technical scheme, a new variety which is stable in hereditary performance, good in ketone body quality, excellent in meat quality and high in growth speed can be obtained, and the variety requirement of mutton sheep industry development is met.

Description

Technical Field

[0001] The invention relates to the technical field of animal breeding, and in particular to a method for breeding a new breed of meat sheep. Background Art

[0002] The breed of mutton sheep determines the production performance of mutton sheep to a large extent. At present, although my country has a rich variety of local breeds and cultivated breeds with good meat quality and strong adaptability, and some breeds have high lambing rates, they generally have the disadvantages of slow growth rate and low carcass meat production performance, which cannot well meet people's growing demand for mutton. In order to improve the comprehensive characteristics of existing mutton sheep breeds, we can take advantage of the differences between breeds, adopt hybridization, self-breeding and other methods, gather different excellent trait genes in the same breed, and cultivate high-quality mutton sheep breeds that are adapted to regional development. Therefore, how to make rational use of various mutton sheep breeds, integrate superior genes, give full play to the genetic potential of each breed, and cultivate new mutton sheep strains is imminent. Summary of the invention

[0003] The purpose of the present invention is to provide a method for breeding a new breed of meat sheep. Through the technical scheme of the present invention, a new breed with stable genetic performance, good carcass quality, excellent meat quality and fast growth rate can be obtained, thereby solving the breed demand for the development of the meat sheep industry.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] The present invention provides a method for breeding a new breed of meat sheep, comprising the following steps:

[0006] (1) Using Tibetan sheep as the male parent and small-tailed Han sheep as the female parent, the hybridization yields the F1 generation;

[0007] (2) Using Tibetan sheep as the male parent, selecting high-quality ewes from the F1 generation as the female parent, and hybridizing to obtain the F2 generation;

[0008] (3) Using Texel sheep as the male parent and selecting high-quality ewes from the F2 generation as the female parent, the F3 generation is obtained by hybridization;

[0009] (4) Select high-quality ewes and rams from the F3 generation and cross-breed them to obtain the product.

[0010] Preferably, the selection criteria for the male parent in step (1) are adult weight of 55-65 kg, adult height of 64-70 cm, adult chest circumference of 90-95 cm, fast growth and development, and high carcass meat production performance.

[0011] Preferably, the selection criteria for the mother in step (1) are adult weight of 60-68 kg, adult height of 75-85 cm, fast growth rate, strong maternal instinct, many lambs, and good reproductive capacity.

[0012] Preferably, the selection criteria for the male parent in step (3) are adult body weight of 100-120 kg, adult body height of 85-90 cm, adult chest circumference of 105-110 cm, fast growth and development, high carcass meat production performance, and excellent meat quality.

[0013] Preferably, the selection criteria for the high-quality ewes are birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and weight of more than 80 kg when grown.

[0014] Preferably, the selection criteria for the high-quality rams are birth weight above 5.0 kg, weight above 60 kg at 6 months of age, and adult weight above 90 kg.

[0015] By adopting the above technical solution, the present invention has the following beneficial effects:

[0016] In the technical solution of the present invention, Tibetan sheep is used as the male parent, small-tailed Han sheep is used as the female parent, and the hybrid offspring is used as the female parent, and Texel sheep is used as the male parent to obtain the final offspring breed. The three-way hybrid obtained by the breeding method combines the genetic material of the three breeds and the complementary effects of the three breeds, and can utilize the hybrid advantages of the offspring and the hybrid advantages of the female parent, that is, the obtained new breed has the advantages of stable genetic performance, good ketone quality, excellent meat quality and fast growth rate. DETAILED DESCRIPTION

[0017] The present invention provides a method for breeding a new breed of meat sheep, comprising the following steps:

[0018] (1) Using Tibetan sheep as the male parent and small-tailed Han sheep as the female parent, the hybridization yields the F1 generation;

[0019] (2) Using Tibetan sheep as the male parent, selecting high-quality ewes from the F1 generation as the female parent, and hybridizing to obtain the F2 generation;

[0020] (3) Using Texel sheep as the male parent and selecting high-quality ewes from the F2 generation as the female parent, the F3 generation is obtained by hybridization;

[0021] (4) Select high-quality ewes and rams from the F3 generation and cross-breed them to obtain the product.

[0022] In the present invention, Tibetan sheep are used as the male parent, and the selection criteria of the male parent are 55-65kg in adult weight, 64-70cm in adult height, 90-95cm in adult chest circumference, fast growth and development, and high carcass meat production performance. In the present invention, small-tailed Han sheep are used as the female parent, and the selection criteria of the female parent are 60-68kg in adult weight, 75-85cm in adult height, fast growth rate, strong maternal instinct, many lambs, and good reproductive ability.

[0023] In the present invention, Texel sheep are used as the male parent, and the male parent selection criteria are adult weight 100-120kg, adult body height 85-90cm, adult chest circumference 105-110cm, fast growth and development, high carcass meat production performance and excellent meat quality.

[0024] In the present invention, the selection criteria for the high-quality ewes are birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and weight of more than 80 kg when grown up.

[0025] In the present invention, the selection criteria for the high-quality rams are birth weight of more than 5.0 kg, weight of more than 60 kg at 6 months of age, and weight of more than 90 kg when grown up.

[0026] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0027] Example 1

[0028] A method for breeding a new breed of meat sheep, comprising the following steps:

[0029] (1) Selecting Tibetan sheep with an adult weight of 60 kg, an adult height of 68 cm, an adult chest circumference of 93 cm, fast growth and development, and high carcass meat production performance as the male parent, and selecting small-tailed Han sheep with an adult weight of 64 kg, an adult height of 80 cm, fast growth, strong maternal instinct, many lambs, and good reproductive ability as the female parent, and hybridizing to obtain the F1 generation;

[0030] (2) Select Tibetan sheep with an adult weight of 60 kg, an adult height of 68 cm, an adult chest circumference of 93 cm, fast growth and development, and high carcass meat production performance as the male parent, and select high-quality ewes from the F1 generation according to the standards of birth weight above 4.5 kg, weight at 6 months of age above 50 kg, and adult weight above 80 kg as the female parent, and crossbreed to obtain the F2 generation;

[0031] (3) Select Texel sheep with an adult weight of 110 kg, an adult height of 88 cm, an adult chest circumference of 107 cm, fast growth and development, high carcass meat production performance, and good meat quality as the male parent, and select high-quality ewes from the F2 generation according to the standards of birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and adult weight of more than 80 kg as the female parent, and crossbreed to obtain the F3 generation;

[0032] (4) Select high-quality ewes from the F3 generation according to the standards of birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and adult weight of more than 80 kg. Select high-quality rams according to the standards of birth weight of more than 5.0 kg, weight of more than 60 kg at 6 months of age, and adult weight of more than 90 kg for cross-breeding.

[0033] Example 2

[0034] A method for breeding a new breed of meat sheep, comprising the following steps:

[0035] (1) Selecting Tibetan sheep with an adult weight of 55 kg, an adult height of 64 cm, an adult chest circumference of 90 cm, fast growth and development, and high carcass meat production performance as the male parent, and selecting small-tailed Han sheep with an adult weight of 60 kg, an adult height of 75 cm, fast growth, strong maternal instinct, many lambs, and good reproductive ability as the female parent, and hybridizing to obtain the F1 generation;

[0036] (2) Select Tibetan sheep with an adult weight of 55 kg, an adult height of 64 cm, an adult chest circumference of 90 cm, fast growth and development, and high carcass meat production performance as the male parent, and select high-quality ewes from the F1 generation according to the standards of birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and adult weight of more than 80 kg as the female parent, and crossbreed to obtain the F2 generation;

[0037] (3) Selecting Texel sheep with an adult weight of 100 kg, an adult height of 85 cm, an adult chest circumference of 105 cm, fast growth and development, high carcass meat production performance, and good meat quality as the sire, and selecting high-quality ewes from the F2 generation according to the standards of birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and adult weight of more than 80 kg as the dam, and hybridizing to obtain the F3 generation;

[0038] (4) Select high-quality ewes from the F3 generation according to the standards of birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and adult weight of more than 80 kg. Select high-quality rams according to the standards of birth weight of more than 5.0 kg, weight of more than 60 kg at 6 months of age, and adult weight of more than 90 kg for cross-breeding.

[0039] Example 3

[0040] A method for breeding a new breed of meat sheep, comprising the following steps:

[0041] (1) Selecting Tibetan sheep with an adult weight of 65 kg, an adult height of 70 cm, an adult chest circumference of 95 cm, fast growth and development, and high carcass meat production performance as the male parent, and selecting small-tailed Han sheep with an adult weight of 68 kg, an adult height of 85 cm, fast growth, strong maternal instinct, many lambs, and good reproductive ability as the female parent, and hybridizing to obtain the F1 generation;

[0042] (2) Select Tibetan sheep with an adult weight of 120 kg, an adult height of 90 cm, an adult chest circumference of 110 cm, fast growth and development, and high carcass meat production performance as the male parent, and select high-quality ewes from the F1 generation according to the standards of birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and adult weight of more than 80 kg as the female parent, and crossbreed to obtain the F2 generation;

[0043] (3) Selecting Texel sheep with an adult weight of 120 kg, an adult height of 90 cm, an adult chest circumference of 110 cm, fast growth and development, high carcass meat production performance, and good meat quality as the sire, and selecting high-quality ewes from the F2 generation according to the standards of birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and adult weight of more than 80 kg as the dam, and hybridizing to obtain the F3 generation;

[0044] (4) Select high-quality ewes from the F3 generation according to the standards of birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and adult weight of more than 80 kg. Select high-quality rams according to the standards of birth weight of more than 5.0 kg, weight of more than 60 kg at 6 months of age, and adult weight of more than 90 kg for cross-breeding.

[0045] Comparative Example 1

[0046] Same as Example 1, except that step (3) is omitted.

[0047] Test Example 1

[0048] Based on the hybrid offspring obtained above, the growth indicators of the hybrid F3 generations of Examples 1-3 and the hybrid F2 generations of Comparative Example 1 at 2, 4, and 6 months of age, including body weight, body length, body height, and chest circumference, were statistically analyzed, and the results were averaged, as shown in Table 1.

[0049] Table 1 Growth indicators of hybrid offspring in different groups

[0050]

[0051] As can be seen from Table 2, the hybrid offspring of the meat sheep in the embodiment group of the present invention grows faster. At the same age, the weight, body length, body height and chest circumference of the hybrid offspring of the meat sheep in the embodiment group are significantly greater than those of the meat sheep in the control group. This also shows that the hybrid offspring bred by the present invention grows faster.

[0052] Test Example 2 (one)

[0054] Based on the hybrid breeding method of Example 1, the hybrid F3 generation of meat sheep in Examples 1-3 and the hybrid F2 generation of meat sheep in Comparative Example 1 were slaughtered and sampled on site, and the meat quality indexes of the longissimus dorsi muscle of each group were tested at different ages, including shear force, water loss rate and marbling score. The determination methods were respectively referred to "NY / T 1180-2006", "GB18394-2001" and "NY_T2781-2015 Sheep Carcass Grade Specification Evaluation Specification". The average value of the test results was taken, and the specific results are shown in Table 2.

[0055] Table 2 Meat quality indicators of hybrid offspring in different groups

[0056]

[0057] As can be seen from Table 2, the corresponding meat quality indicators of the hybrid offspring in different treatment groups show a decreasing trend with the increase of age, among which the decreasing trend of the relevant indicators of the hybrid offspring in the control group is the most significant, and the meat quality indicators of the hybrid offspring in the overall embodiment group are significantly higher than those in the control group. This also shows that the meat quality performance of the hybrid offspring bred by the present invention is more excellent. (two)

[0059] The carcass weight and slaughter rate of the 6-month-old hybrid F3 generation of the meat sheep in Examples 1-3 and the hybrid F2 generation of the meat sheep in Comparative Example 1 were measured, with specific reference to the "Technical Specifications for Determination of Production Performance of Sheep and Goats".

[0060] Carcass weight: After slaughtering the sheep to be tested, remove the skin, head, hooves and internal organs (keep the kidneys and renal fat), and let it stand for 30 minutes. The weight obtained is the carcass weight, expressed in kilograms (kg).

[0061] Slaughter rate = carcass weight / live weight before slaughter × 100%

[0062] Table 3 Carcass weight and slaughter rate of hybrid offspring in different groups

[0063] Carcass weight (kg) Slaughter rate (%) Example 1 30.83 51.72 Example 2 31.09 51.58 Example 3 30.75 51.32 Comparative Example 1 25.91 47.93

[0064] It can be seen from Table 3 that the carcass weight and slaughter rate of the hybrid offspring of the embodiment group are higher than those of the control group.

[0065] From the above, it can be seen that the technical solution of the present invention can obtain a new breed of meat sheep with stable genetic performance, good carcass quality, excellent meat quality and fast growth rate, which can better meet the breed needs of the development of the meat sheep industry.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for breeding a new breed of meat sheep, characterized in that: The steps include: (1) Using Tibetan sheep as the male parent and small-tailed Han sheep as the female parent, the hybridization yields the F1 generation; (2) Using Tibetan sheep as the male parent, selecting high-quality ewes from the F1 generation as the female parent, and hybridizing to obtain the F2 generation; (3) Using Texel sheep as the male parent and selecting high-quality ewes from the F2 generation as the female parent, the F3 generation is obtained by hybridization; (4) Select high-quality ewes and rams from the F3 generation and cross-cross them to obtain; The selection criteria of the male parent in step (1) are: adult weight of 55-65 kg, adult height of 64-70 cm, adult chest circumference of 90-95 cm, fast growth and development, and high carcass meat production performance; The selection criteria of the female parent in step (1) are: adult weight of 60-68 kg, adult height of 75-85 cm, fast growth rate, strong maternal instinct, many lambs and good reproductive ability.

2. The breeding method according to claim 1, characterized in that: The selection criteria for the male parent in step (3) are adult weight of 100-120 kg, adult height of 85-90 cm, adult chest circumference of 105-110 cm, fast growth and development, high carcass meat production performance, and excellent meat quality.

3. The breeding method according to claim 1, characterized in that: The selection criteria for the high-quality ewes are birth weight of more than 4.5 kg, weight of more than 50 kg at 6 months of age, and weight of more than 80 kg when grown.

4. The breeding method according to claim 1, characterized in that: The selection criteria for the high-quality rams are birth weight of more than 5.0 kg, weight of more than 60 kg at 6 months of age, and more than 90 kg as an adult.

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