The genetical architecture of a number of economically important characters and the prediction of performance of recombinant inbred lines in rice
1985
Perera, A.L.T. | Senadhira, D. | Lawrence, M.J.
It was possible to predict the properties of the recombinant inbred lines that can be extracted from an F2 of a cross between two inbred lines with a high degree of accuracy, provided that an appropriate estimate of the additive genetic variance of the F2 generation was available. Among several experimental designs that can be used to obtain an estimate of this genetic parameter, the triple cross design was the best. The results of a completely randomized triple test cross experiment were presented, discussed, and used to predict the proportion of superior recombinant inbred lines that can be extracted from this cross with respect to four characters of economic interest. The results indicated that all four characters were controlled by genes with additive, dominance, and epistatic effects of the duplicate type; and that at least some of these genes were linked in the repulsion phase. The predictions of the proportions of inbred lines that can be extracted from this cross indicated that it should be fairly easy to obtain superior lines for three of these characters
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