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A NEW APPROACH TO PREDICT THE POSSIBLE NUMBER OF D.C HYBRIDS VIA MULTI-FULL DIALLEL CROSSING | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 38, Issue 1, 2007, Pages 125-127 | ||
| Author | ||
| Medhat M. Elsahookie | ||
| Abstract | ||
| It is common among plant breeders to use the formulae; n(n-l)/2 , n(n-l)(n-2)/2 , and n(n-l)(n-2)(n-3)/8 to predict the number of double cross (D.C) hybrids that could be obtained by crossing any number of inbreds (n). In this article , the probability of changing the inbred parent in all possible reciprocal crosses led to a new approach to predict the possible number of D.C by crossing several inbreds. It was found that to predict the possible number of D.C hybrids resulting from crossing 4 inbreds, the formula for that is 24 * 5,5 inbreds is: 24 x 52,6 inbreds is 24 * 53, 7 inbreds is 24 x 54, 8 inbreds is 24 x 55, 9 inbreds is 24 * 56, and 10 inbreds is 24 * 57. Accordingly, the number will be 1,875,000 , while by using the above mentioned formula , the number will be 630 D.C only. This will open a new scientific and practical horizon to have much more D.C hybrids than were possible by considering the conventional formula. | ||
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