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Fig. 1 | BMC Genomics

Fig. 1

From: Genetic basis of heterosis for yield and yield components explored by QTL mapping across four genetic populations in upland cotton

Fig. 1

Diagram of the development scheme for the RIL, IF2, and two BCFI populations. a Crosses were made between two different lines from RILA and RILB (for example, RILA1 × RILB2). Here, RILA and RILB represent female and male RIL lines, respectively. This procedure was repeated two times, and finally 376 lines were produced, forming the IF2 population. The IF2MPH dataset derived from the IF2 population included 376 mid-parental heterosis (MPH) values (H), which were estimated by MPH = F1 – MP (Hua et al. 2003). Here, F1 represents the observations in the IF2 populations, and MP represents the average trait value between their parents. b, c The HSBCF1 and MARBCF1 populations were produced by RILs × P1 and RILs × P2, respectively, and each contained 188 lines. The RILs were used as the female parents in two backcross designs with the two original parents. The HSBCF1MPH and MARBCF1MPH datasets also each included 188 individuals (H) and were estimated by MPH = F1 – MP (Hua et al. 2003). Here, F1 represents the observations in the two BCF1 populations, and MP represents the average trait value between their corresponding parents. HS: HS46; MAR: MARCABUCAG8US-1-88

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