高繁殖力猪新品系-HN繁殖性状的遗传分析及其年生产力研究

发布时间：2018-12-29 08:34

【摘要】：为对高繁殖力猪新品系-HN繁殖性能进行遗传分析,揭示其遗传规律,并探索其年生产力,本研究利用高繁殖力猪新品系-HN 0~4世代经产母猪192的窝繁殖成绩,采用多性状动物模型BLUP估计高繁殖力猪新品系-HN繁殖性状的育种值,分析各性状表型参数、遗传参数以及各世代表型趋势和遗传趋势;同时,以60头2~4胎大白母猪繁殖性能为对照,对45头同胎次新品系-HN母猪窝总产仔数(TNB)、产活仔数(NBA)、35日龄断奶存活仔数(S35)、初生个体重(BW)、初生窝重(LBW)、21日龄个体重(W21)、21日龄窝重(LW21)、35日龄断奶个体重(W35)、35日龄断奶窝重(LW35)和有效乳头数(ETN)等指标进行测定,比较分析两者之间的繁殖性能、年生产力及其所产生的经济效益,结果如下:(1)高繁殖力猪新品系-HN繁殖性状的变异系数较小,在1.75%~6.42%之间;TNB、NBA、S35、ETN、BW、LBW、W21、LW21、W35和LW35的遗传力分别为0.160、0.091、0.112、0.072、0.167、0.170、0.116、0.119、0.202和0.114;TNB、NBA、S35与BW、W21、W35的表型相关(-0.220、-0.121、-0.061、-0.249、-0.125、-0.099、-0.179、-0.057、-0.217)呈弱的负相关,其他繁殖性状间的表型相关和遗传相关都呈正相关,且LW35与其他繁殖性状间的表型相关和遗传相关均呈中等或强的正相关;TNB、NBA、S35、ETN、BW、LBW、W21、LW21、W35和LW35的每个世代的遗传进展分别为0.000440头、0.001019头、0.000112头、0.003106对、0.004361kg、0.000115kg、0.002620kg、0.010261kg、0.001875kg和0.011226kg。(2)高繁殖力猪新品系-HN的TNB(14.81头)、NBA(14.14头)、S35(13.28头)、LBW(16.88kg)、LW35(81.03kg)和ENT(7.98对)都极显著高于大白猪(P0.01);BW(1.19kg)、W21(4.00kg)和W35(6.10kg)都极显著低于大白猪(P0.01);LW21(53.36kg)显著高于大白猪(0.01P0.05);仔猪育成率为93.92%,高出大白猪11.78%;每头新品系-HN猪和大白猪母猪年提供断奶仔猪数分别为27.90头和17.31头,根据当前市场价格纯盈利分别达6524.95元和3940.43元。以上结果表明:高繁殖力猪新品系-HN各繁殖性状的表型参数变异系数较小,繁殖性状的遗传力符合一般规律,说明该新品系具有稳定的遗传基础,已达到选育的目标;在选育过程中,可以把LW35作为早期主选性状之一,用于选择高繁殖力个体;新品系-HN猪年生产力及其所产生的经济效益都优于大白猪。
[Abstract]:In order to analyze the reproductive performance of HN, a new line of high fecundity pig, to reveal its genetic law and to explore its annual productivity, this study made use of the litter reproductive achievements of HN 0N4 generation, a new line of high fecundity pig, after producing sows. Multi-trait animal model BLUP was used to estimate breeding value of HN breeding traits, and phenotypic parameters, genetic parameters, phenotypic trends and genetic trends of each generation were analyzed. At the same time, the reproductive performance of 60 2 脳 4 large white sows was used as control. The total litter size of 45 new strain HN sows with the same birth order, (TNB), litter size, survival number of (NBA), 35 day weaning (S35), and birth weight of (BW), were also studied. The birth weight of (LBW), was 21 days old (W21), 21 days old nest weight (LW21), 35 day weaning weight (W35), 35 days weaning nest weight (LW35) and effective nipple number (ETN) were measured. The results are as follows: (1) the coefficient of variation of HN reproductive traits of a new strain of high fecundity pig is small, ranging from 1.75g to 6.42%; The heritability of TNB,NBA,S35,ETN,BW,LBW,W21,LW21,W35 and LW35 were 0. 160 0. 091 and 0. 1 12 0. 072 respectively. The heritability of TNB,NBA,S35,ETN,BW,LBW,W21,LW21,W35 and LW35 were 0. 116, 0. 1, 0. 19, 0. 202 and 0. 114, respectively. There was a weak negative correlation between TNB,NBA,S35 and BW,W21,W35 phenotypic correlation (-0.220- 0.121C -0.061U -0.249U -0.125U -0.125U -0.179U -0.057N -0.217). The phenotypic and genetic correlations among other reproductive traits were positive, and the phenotypic and genetic correlations between LW35 and other reproductive traits were moderate or strong. The genetic progress of TNB,NBA,S35,ETN,BW,LBW,W21,LW21,W35 and LW35 in each generation were 0.000440, 0.001019, 0.000112, 0.003106, 0.004361kg / kg 0.000115kg / kg, 0.002620kg / kg, 0.010261kg / kg, respectively. 0.001875kg and 0.011226kg. (2) TNB (14.81), NBA (14.14 head), S35 (13.28), LBW (16.88kg) of HN, a new line of high fecundity pig. LW35 (81.03kg) and ENT (7.98 pairs) were significantly higher than those in large white pigs (P0.01). BW (1.19kg), W21 (4.00kg) and W35 (6.10kg) were significantly lower than large white pigs (P0.01), LW21 (53.36kg) was significantly higher than large white pigs (0.01P0.05), the breeding rate of piglets was 93.92, which was higher than that of large white pigs (11.78%). The number of weaning piglets per new strain, HN pig and large white pig sows, was 27.90 and 17.31 respectively, and the net profit was 6524.95 yuan and 3940.43 yuan respectively according to the current market price. The results showed that the coefficient of variation of phenotypic parameters of HN was small, and the heritability of reproductive traits was in accordance with the general rule, which indicated that the new line had a stable genetic basis and had reached the goal of breeding. In the process of breeding, LW35 can be used as one of the main early selection traits to select individuals with high fecundity, and the annual productivity and economic benefits of the new strain HN are better than those of large white pigs.
【学位授予单位】：甘肃农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S828

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