ƯU THẾ LAI VỀ MỘT SỐ TÍNH TRẠNG CỦA CÁC TỔ HỢP LAI GIỮA 3 GIỐNG THUẦN DUROC, PIÉTRAIN VÀ LANDRACE

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Tác giả: Ngọc Bách Đinh, Văn Bình Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2022

Mô tả vật lý: tr.75-81

Bộ sưu tập: Metadata

ID: 332411

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Mục đích của nghiên cứu này là chọn lọc ra được các tổ hợp đực lai cuối cùng tốt nhất giữa 3 giống trên để phục vụ cho sản suất lợn thương phẩm có năng suất, chất lượng cao. Nghiên cứu được thực hiện trên 1.718 cá thể của 12 tổ hợp lai với các chỉ tiêu nghiên cứu về ưu thế lai của các tính trạng tăng khối lượng/ngày (TKL), dày mỡ lưng (DML), tiêu tốn thức ăn (TTTA) và tỉ lệ nạc (TLN). Kết quả nghiên cứu cho thấy, ưu thế lai có biểu hiện tốt ở tất cả các tổ hợp lai đối với tính trạng TKL và TLN, biến động tương ứng từ 0,06 đến 1,06% và 0,04 đến 2,47%. Các tính trạng DML và TTTA không thấy biểu hiện ưu thế lai. Đối với tính trạng TKL, ưu thế lai tốt nhất ở tổ hợp lai DP (1,06%) và DxDP (0,89%). Đối với tính trạng TLN, ưu thế lai tốt nhất ở tổ hợp lai PD (0,82%) và DP (0,38%). Đối với tính trạng TKL, ưu thế lai tốt nhất ở tổ hợp lai DL (1,00%) và LxDL (0,66%). Đối với tính trạng TLN, ưu thế lai tốt nhất ở tổ hợp lai DL (0,91%) và DxLD (0,71%). Đối với tính trạng TKL, ưu thế lai tốt nhất ở tổ hợp lai PL (0,35%) và PxLP (0,24%). Đối với tính trạng TLN, ưu thế lai tốt nhất ở 3 tổ hợp lai: PL (2,47%)
PxLP (1,25%) và LxPL (0,83%). Qua kết quả đánh giá về ưu thế lai, bước đầu đã chọn ra được 06 tổ hợp lai: DP, DxPD, DL, LxDL, PL và PxLP để đưa vào các bước chọn lọc tiếp theo.The objective of this research is to select the best final cross-bred boar combinations between three above breeds to produce high productivi ty and quality commercial pigs. The research was implemented on 1,718 individuals of 12 cross-bred combinations with research targets of the traits of body weigh gain (BWG), back fat thick layer (BFTL), feed - intake (FI) and lean meat ratio (LMR). The research results showed that all of cross-bred combinations had good expression of heterosis on BWG and LMR. It’s variation from 0.06 to 1.06% and 0.04 to 2.47%, reps. The traits of BFTL and FI had no heterosis expression. For cross-bred combinations of D and P: The best heterosis on BWG in DP (1.06%) and DxDP (0.89%)
and the best heterosis on LMR in PD (0.82%) and DP (0.38%). For cross-bred combinations of D and L: The best heterosis on BWG in DL (1.00%) and LxDL (0.66%)
And the best heterosis on LMR in DL (0.91%) and DxLD (0.71%). For cross-bred combinations of P and L: The best heterosis on BWG in PL (0.35%) and PxLP (0.24%)
And the best heterosis on LMR in three cross-bred of PL (2.47%), PxLP (1.25%) and LxPL (0.83%). Base on these reserach results, 06 crossbred combinations of DP, DxPD, DL, LxDL, PL and PxLP were selected for the next selection steps.

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