# Survey of SNPs Associated with Total Number Born and Total Number Born Alive in Pig
## 2 SNPs Associated with Total Number Born Alive
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline  & **SNP** & **SSC** & **Location** & **Allele** & **Consequence** & **SYMBOL** & **Trait** & **Bred** & **Reference** \\ \hline
69 & rs81430859 & 11 & 4296303 & C & intron\_variant & WASP3 & NBA & Landace/Large White & [7] \\ \hline
70 & rs81242222 & 11 & 67129570 & A & intergenic\_variant & - & NBA & Landace/Large White & [7] \\ \hline
71 & rs81434499 & 12 & 36207006 & G & intergenic\_variant & - & NBA & Erhualian & [28] \\ \hline
72 & rs8062240 & 13 & 52784022 & C & intron\_variant & FOXP1 & NBA & Large White & [23] \\ \hline
73 & rs81215583 & 13 & 71905692 & C & synonymous\_variant & RPN1 & NBA & Erhualian & [28] \\ \hline
74 & rs81447100 & 13 & 80866929 & A & intron\_variant & CLSTN2 & NBA & Erhualian & [28] \\ \hline
75 & rs81447231 & 13 & 82603578 & A & intron\_variant & GRK7 & NBA & Erhualian & [28] \\ \hline
76 & rs319258722 & 14 & 123766842 & T & intergenic\_variant & - & NBA & Large White & [23] \\ \hline
77 & rs45435330 & 15 & 118847390 & A & intron\_variant & IGFBP2 & NBA & Berkshire & [24] \\ \hline
78 & rs324003968 & 15 & NA & & & NBA & Commerciala & [25] \\ \hline
79 & rs81459590 & 16 & 6025546 & A & intron\_variant & MYO10 & NBA & Landace/Large White & [7] \\ \hline
80 & rs80952566 & 17 & 27123793 & T & intron\_variant & - & NBA & Erhualian & [28] \\ \hline
81 & rs81469701 & 18 & 42920811 & T & upstream\_gene\_var & SCRN1 & NBA & Landace/Large White & [7] \\ \hline
82 & rs81471172 & 18 & 51640938 & T & intron\_variant & HECW1 & NBA & Large White & [23] \\ \hline
83 & rs81473442 & X & 91880535 & C & intron\_variant & TRPC5 & NBA & Landace/Large White & [26] \\ \hline
84 & rs81323503 & X & 92070342 & A & intergenic\_variant & - & NBA & Landace/Large White & [26] \\ \hline
85 & rs81283192 & X & 92244402 & A & intron\_variant & RTL4 & NBA & Landace/Large White & [26] \\ \hline
86 & rs337547716 & X & 92330719 & A & intron\_variant & RTL4 & NBA & Landace/Large White & [26] \\ \hline
87 & rs80834138 & X & 92447181 & A & intron\_variant & LHFPL1 & NBA & Landace/Large White & [26] \\ \hline
88 & rs81339510 & X & 118854990 & T & intergenic\_variant & - & NBA & Landace/Large White & [26] \\ \hline \hline \end{tabular}
\end{table} 
Table 1: _Cont._Search for SNPs associated with NBA of Chinese Erhualian pigs was carried out by [PERSON] et al. [28]. Sows with high and low estimated breeding values (EBVs) were selected for genotyping. According to the research results, 9 SNPs associated with Pig QTLdb with NBA were presented. The greatest effect was found for SNP rs81447100 (SSC13), which was additionally tested on Erhualian pigs (\(n=313\)), Sutai (\(n=173\)) and Yorkshire (\(n=488\)). In all groups under study, a significant association between allelic variants of SNP rs81447100 (SSC13) and NBA was determined. However, allele A was desirable for the Erhualian pigs and allele G for the Sutai and Yorkshire pigs. According to research work of [PERSON] et al. [14], conducted on Landrace and Yorkshire pigs the database contains 15 SNPs localized on SSC1 and SSC8 and associated with NBA. 11 of these SNPs are located in the QTL regions annotated earlier, and 4 SNPs are presented for the first time. All these 4 SNPs (rs329624627, rs339929690, rs322202112 and rs330585697) are located on the SSC1. The most significant effect was established for SNP rs332924521 (SSC1). [PERSON] et al. [23] conducted associative studies on Large White pigs from two commercial lines of <<Hypor>> and <<Topigs>>, and revealed 4 SNPs associated with NBA located on SSC7 (rs81397142 and rs81397215), SSC1 (rs81348779) and SSC2 (rs81356698). [PERSON] et al. [7] conducted research using Large White and Landrace pigs. Preliminary calculations based on graphs of multidimensional scaling showed the genetic distance between the breeds. For analysis pigs were divided into two clusters taking into account the breed and intra-breed clusters taking into account the breeding economy.