Follicular Dynamics during Estrous Cycle of Pubertal, Mature and Postpartum Crossbred (Nili Ravi x Jianghan) Buffaloes

被引：2

作者：

Abulaiti, Adili ^{[1
,2
,3
,4
]}

Riaz, Umair ^{[1
,5
]}

Naseer, Zahid ^{[6
]}

Ahmed, Zulfiqar ^{[1
]}

Hua, Guohua ^{[1
,2
,3
,4
]}

Yang, Liguo ^{[1
,2
,3
,4
]}

机构：

[1] Huazhong Agr Univ, Coll Anim Sci & Technol, Key Lab Anim Genet Breeding & Reprod, Minist Educ, Wuhan 430070, Peoples R China

[2] Int Joint Res Ctr Anim Genet Breeding & Reprod, Wuhan 430070, Peoples R China

[3] Hubei Prov Engn Res Ctr Buffalo Breeding & Prod, Wuhan 430070, Peoples R China

[4] Key Lab Smart Farming Agr Anim, Wuhan 430070, Peoples R China

[5] Islamia Univ Bahawalpur, Fac Vet & Anim Sci, Dept Theriogenol, Bahawalpur 63100, Pakistan

[6] Pir Mehr Ali Shah Arid Agr Univ, Fac Vet & Anim Sci, Dept Clin Studies, Theriogenol Sect, Rawalpindi 46000, Pakistan

来源：

ANIMALS | 2022年 / 12卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Nili Ravi-Jianghan crossbred buffalo; follicular dynamics; estrous cycle; ultrasonography; BUBALUS-BUBALIS; ARTIFICIAL-INSEMINATION; PREOVULATORY FOLLICLE; OVARIAN-FOLLICLES; ENDOCRINE CHANGES; CONCEPTION RATE; CORPUS-LUTEUM; COWS; SYNCHRONIZATION; EFFICACY;

D O I：

10.3390/ani12091208

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

The follicular dynamics is used as a reliable indicator for reproductive management in livestock. However, the follicular dynamics (follicle wave emergence, estrus cycle length, diameter of dominant follicle, follicular growth and atretic phases) during the estrous cycle of crossbred (Nili Ravi-Jianghan) buffalo is still unexplored. Therefore, the present study aimed to observe the follicular dynamics in estrous cycle of crossbred buffaloes at different physiological stages (pubertal; n = 28, sexual mature; n = 22 and postpartum; n = 18). In the present study, the follicular dynamics were ultrasonically examined at 12 h intervals throughout an estrous cycle during the breeding season. The results indicate that about 86.76% (59/68) crossbred buffaloes, irrespective of physiological stage, exhibited two follicular waves in estrous cycle with an average estrus cycle length was 20.7 +/- 0.4 days. The estrus cycle length was significantly shorter (p < 0.05) in pubertal buffaloes (19.4 +/- 0.4 days) compared with sexual mature (21.5 +/- 0.3 days) and postpartum (21.9 +/- 0.4 days) buffaloes. The first follicular wave emerged on same day during one- (pubertal vs. postpartum), two- (pubertal vs. mature vs. postpartum) or three-wave (mature vs. postpartum) estrous cycle buffaloes. The maximum diameter of dominant follicle (DF) in pubertal, sexually mature and postpartum crossbred buffaloes was 9.6 +/- 2.0 mm, 10.6 +/- 0.5 mm and 12.6 +/- 0.7 mm with growth rate of 1.08 +/- 0.04 mm/day, 0.92 +/- 0.04 mm/day, and 0.9 +/- 0.07 mm/day, respectively. In conclusion, similar to other buffalo breeds, Nili Ravi-Jianghan crossbred buffaloes showed the two-wave follicular pattern dominantly with an average duration of similar to 20 days estrous cycle. The observed follicular dynamics can be used as a reliable indicator for synchronization and fixed-time artificial insemination (FTAI) programs to improve the fertility of crossbred buffaloes.

引用

页数：14

共 58 条

[1] Effect of Different Synchronization Regimens on Reproductive Variables of Crossbred (Swamp x Riverine) Nulliparous and Multiparous Buffaloes during Peak and Low Breeding Seasons [J].