The Effects of Colostrum on Gastrointestinal Function and Related Diseases in Premature Infants: A Comprehensive Meta-Analysis of Randomized Controlled Trials

Aim: To systematically evaluate the effects of colostrum intervention on gas-trointestinal function and related diseases in premature infants. Methods: A randomized controlled trial was conducted in the Cochrane Library, PubMed, EBSCO, CINAHL, Embase, Medline, CBMDISC, CNKI, Wan Fang and VIP databases on the effects of colostrum and oral intervention on gastrointestinal function and related diseases in premature infants. Literature screening, quality evaluation and data extraction were conducted, and data analysis was conducted using Revman 5.3. Results: A total of 7 references were included, including 392 subjects. The combined results showed that: colostrum can effectively reduce the incidence of nosocomial infection [RR = 0.42, 95% CI (0.25, 0.73), P = 0.002]. Conclusion: Colostrums oral intervention can effectively reduce the incidence of nosocomial infection in premature infants. However, there was no advantage in feeding intolerance, necrotizing enters colitis and length of hospital stay.

水稻耐储藏特性三年动态鉴定与QTL分析

种子耐储藏特性是粮食作物的特殊农艺性状之一,耐储藏性能对种子生产和种质资源保存有重要意义。以粳型超级稻龙稻5(LD5)和高产籼稻中优早8(ZYZ8)杂交衍生的重组自交系(RILs)群体(共180个株系)为实验材料,自然高温高湿条件下放置1年、2年和3年后,对不同储藏时段种子发芽率进行比较,并利用223个分子标记的遗传图谱进行动态QTL鉴定。结果表明,不同储藏时段龙稻5的发芽率均显著低于中优早8,株系间耐储性存在较大差异;不同储藏时段发芽率显著相关,相邻存储时段发芽率关系紧密。共检测到17个耐储性相关的QTLs,3个老化时段分别检测到5、4和3个,检测到5个动态条件QTLs,单一QTL解释5.60%–32.76%的表型变异,加性效应在–16.78%–16.95%范围内。主效QTL簇qSSC2、qSSC6、qSSC7和qSSC8能调控不同储藏时段的发芽率, qSSC6具有明显降低发芽率的效应。共检测到26对上位性互作位点,主效QTL qSS1和q SS4参与上位性互作,这表明上位性互作是调控耐储藏性状的重要遗传组成。研究结果为水稻(Oryza sativa)耐储性相关QTL的精细定位奠定基础,同时丰富了耐储性分子标记辅助选择育种的基因资源。