... Growth Performance and Sperm Quality of Stress Negative Piétrain Boars and Their Hybrids with Duroc 222 REFERENCES Dang Vu Binh, V.D. Ton, N.C. Oanh, (2008). Productivity and meat quality ... Performance and Sperm Quality of Stress Negative Piétrain Boars and Their Hybrids with Duroc 220 Table 2. Production performance, Least square means (LSMSE) of PiDu and Piétrain boars Variable ... www.hua.edu.vn 217 GROWTH PERFORMANCE AND SPERM QUALITY OF STRESS NEGATIVE PIÉTRAIN BOARS AND THEIR HYBRIDS WITH DUROC Đỗ Đức Lực1,2*, Hà Xuân Bộ1, Farnir Frédéric2, Pascal Leroy2 and Đặng Vũ...