State Key Laboratory for Agrobiotechnology, China Agricultural University, No.2 Yuanmingyuan West Road,Beijing, China.
Anim Genet. 2011 Dec;42(6):670-4. doi: 10.1111/j.1365-2052.2011.02193.x. Epub 2011 May 6.
Body size traits reflect the condition of body development, are always mentioned when a breed is described, and are also targets in breeding programmes. In chicken, there are several reports focused on body size traits, such as shank length, tibia length or bone traits. However, no study was carried out on chest width (CW), chest depth (CD), body slope length (BL) and head width (HW) traits. In this study, genome scans were conducted on an F(2) resource population (238 F(2) individuals from 15 full-sib families derived from an intercross of the White Plymouth Rock with the Silkies Fowl) to identify quantitative trait loci (QTL) associated with CW, CD, BL and HW from 7 to 12 weeks of age. In total, 21 significant or suggestive QTL were found that affected four body size traits. Four QTL reached 1% genome-wide significance level: at 297 cM on GGA3 (associated with CW at 9 weeks of age), between 155 and 184 cM on GGA1 (affecting BL traits at 9 and 10 weeks of age), at 22 cM on GGA2 (related with BL traits at 12 weeks of age) and at 36 cM on GGA1 (for HW trait at 8 weeks of age).
体尺性状反映了身体发育状况，在描述品种时经常被提及，也是选育计划的目标。在鸡中，有许多关于体尺性状的报道，如胫长、胫骨长或骨骼性状。然而，尚未有研究针对胸宽（CW）、胸深（CD）、体斜长（BL）和头宽（HW）性状开展研究。本研究在一个 F2 资源群体（15 个全同胞家系的 238 个 F2 个体，由白洛克鸡与丝毛鸡杂交产生）中进行了基因组扫描，以鉴定与 7 至 12 周龄时的 CW、CD、BL 和 HW 相关的数量性状基因座（QTL）。总共发现了 21 个显著或提示性的 QTL，这些 QTL 影响了四个体尺性状。有 4 个 QTL 达到了 1%全基因组显著水平：第 3 号染色体（GGA3）上的 297 cM 处（与 9 周龄时的 CW 相关）、第 1 号染色体（GGA1）上的 155-184 cM 处（影响 9 和 10 周龄时的 BL 性状）、第 2 号染色体（GGA2）上的 22 cM 处（与 12 周龄时的 BL 性状相关）和第 1 号染色体（GGA1）上的 36 cM 处（与 8 周龄时的 HW 性状相关）。
