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Variance of Marker Estimates of Parental Contribution to F2 and BC1-Derived Inbreds

Jiankang Wanga and Rex Bernardob

a Laboratory Center, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, P.R. People's Republic of China
b Dep. of Agronomy, Purdue Univ., 1150 Lilly Hall of Life Sciences, West Lafayette, IN 47905-1150 USA



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  		Fig. 1 Locations of five marker loci on an 80 centimorgan (cM) chromosome with the Terminal Marker Model and Nonterminal Marker Model. The kd values are the distances between adjacent markers on the kth chromosome

 


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  		Fig. 2 Standard error (SE) of the parental contribution to F2-derived recombinant inbreds for a single chromosome for (i) different numbers of marker loci on the chromosome, (ii) different lengths (in centimorgans, cM) of the chromosome, and (iii) terminal versus nonterminal locations of markers

 


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  		Fig. 3 Standard error (SE) of the parental contribution to F2-derived recombinant inbreds with different numbers of marker loci in different species

 


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  		Fig. 4 Probability of obtaining an essentially derived recombinant inbred (RI) when parental contribution is estimated with different numbers of marker loci in different crop species. Thresholds for essential derivation are 0.65 and 0.70 for F2-derived RIs, and 0.85 and 0.90 for BC1-derived RIs

 




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