排序方式: 共有31条查询结果,搜索用时 15 毫秒
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KC Silva‐Santos CR Ferreira GMG Santos MN Eberlin LS Siloto CO Rosa TN Marcantonio MM Seneda 《Reproduction in domestic animals》2014,49(5):711-718
The aim of the present study was to compare the lipid profile in oocytes of indicus and 1/2 indicus × taurus cows with high and low antral follicle count (AFC)/oocyte yields. After an OPU procedure (D0), antral follicles ≥3 mm were counted by ultrasonography (D4, 19, 34, 49, 64), and cows were assigned to groups with either high AFC (≥30 follicles; indicus, NH group; 1/2 indicus × taurus, AH group) or low AFC (≤15 antral follicles; indicus, NL group; 1/2 indicus × taurus, AL group). The lipid profiles of the oocytes were determined by MALDI‐MS. For GI, GII and GIII oocytes, the indicus samples tend to cluster separately from the 1/2 indicus × taurus samples. The lipid species [PC (P‐38:5) + H]+ and/or [PC (P‐36:2) + Na]+, [PC (38:2) + H]+, [PC (38:5) + Na]+ and [TAG (60:8) + NH4]+ were more abundant in indicus (NH and NL groups) than 1/2 indicus × taurus. The higher lipid content in the indicus oocytes likely reflects differences in the rate of lipid metabolism and may contribute to oocyte competence and embryo development. 相似文献
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Ajayi OO Yakubu A Jayeola OO Imumorin IG Takeet MI Ozoje MO Ikeobi CO Peters SO 《Tropical animal health and production》2012,44(5):1089-1095
Sexual size dimorphism is a key evolutionary feature that can lead to important biological insights. To improve methods of
sexing live birds in the field, we assessed sexual size dimorphism in Nigerian local turkeys (Meleagris gallopavo) using multivariate techniques. Measurements were taken on 125 twenty-week-old birds reared under the intensive management
system. The body parameters measured were body weight, body length, breast girth, thigh length, shank length, keel length,
wing length and wing span. Univariate analysis revealed that toms (males) had significantly (P < 0.05) higher mean values than hens (females) in all the measured traits. Positive phenotypic correlations between body
weight and body measurements ranged from 0.445 to 0.821 in toms and 0.053–0.660 in hens, respectively. Three principal components
(PC1, PC2 and PC3) were extracted in toms, each accounting for 63.70%, 19.42% and 5.72% of the total variance, respectively.
However, four principal components (PC1, PC2, PC3 and PC4) were extracted in hens, which explained 54.03%, 15.29%, 11.68%
and 6.95%, respectively of the generalised variance. A stepwise discriminant function analysis of the eight morphological
traits indicated that body weight, body length, tail length and wing span were the most discriminating variables in separating
the sexes. The single discriminant function obtained was able to correctly classify 100% of the birds into their source population.
The results obtained from the present study could aid future management decisions, ecological studies and conservation of
local turkeys in a developing economy. 相似文献
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研究和探讨了虾加工副产物的酶解产物(Enzymatic Hydrolysis Production,EHP)对蛋鸡产蛋率和蛋品质的影响。以虾加工副产物为原料,应用复合生物酶酶解技术制备EHP,选择产蛋率在80%以上的300日龄笼养褐壳蛋鸡288只,随机分成3组,在基础日粮中分别添加0、1.5g/100g、3g/100g虾加工副产物EHP,并替代相应重量的鱼粉,试验期为60天。EHP,可显著提高鸡蛋的哈夫单位(P〈0.05),试验组蛋鸡产蛋率平均提高3.14%,料蛋比相应低于对照组。表明虾加工副产物EHP可显著提高产蛋高峰期过后处于衰减期的鸡蛋的哈夫单位及产蛋率。 相似文献
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甘蓝型油菜高含油量隐性胞核雄性不育两型系的选育 总被引:2,自引:0,他引:2
采用复合回交方法,选育出甘蓝型油菜双低隐性核不育两型系。双低不育系121AB、123AB、175AB、932AB、933AB等表现高含油量、产量高等性状,品质优良。其中175AB、932AB、933AB含油量42.7%~44.0%,蛋白质含量24.2%~25.3%。组配的德油系列优质杂交油菜新组合在比较试验中均比对照种油研七号增产,增产率9.98%~27.34%,表现出较大的增产潜力。 相似文献
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高新技术在茶叶加工中的应用 总被引:1,自引:0,他引:1
本文简述了膜分离技术,超临界流体萃取技术,冷杀菌技术及真空冷冻干燥等新技术的基本原理及其在茶叶加工中的应用状况。 相似文献
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硼对植物营养生理的作用,不仅能使植物细胞壁坚韧与木质化,促进与增强植物的抗逆性(抗旱性与抗寒性),而且能促进植物根系发育及糖在体内的运输等。但是有关硼肥营养机理的研究报道较少,尤其是利用~(10)B 示踪研究植物硼肥营养及其在土壤中的转化,更是罕见。为此,我们应用~(10)B 研究了球茎甘蓝在栗钙土上对硼肥的吸收利用,为栗钙土的硼肥使 相似文献
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Peters SO Gunn HH Imumorin IG Agaviezor BO Ikeobi CO 《Tropical animal health and production》2011,43(3):631-638
Variation in haematological parameters of Nigerian native chickens was studied using 60 clinically normal frizzle-feathered,
naked-neck, and normal-feathered native chickens. These included red blood cell count, haemoglobin, packed cell volume, white
blood cell count, mean corpuscular volume, mean corpuscular haemoglobin concentration, serum glucose, urea, cholesterol, albumin,
globulin and creatinine. Normal-feathered birds had higher (p < 0.05) mean values compared to frizzled and native neck genotypes except for albumin, red blood and white blood cells, and
mean cell haemoglobin concentration. Males generally had higher mean values than their female counterparts across all genotypes.
Correlation coefficients among the parameters were significant (p < 0.001) with r values ranging from 0.26 between red blood cell and mean corpuscular haemoglobin to 0.92 between red blood cell and cholesterol.
Sufficient genetic variation therefore exists for haematological parameters among Nigerian native chickens that may represent
indicator traits for further study. However, the application of molecular tools will provide better understanding and application
of these differences. 相似文献
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