Other agronomic features and grain quality of the NILs were comparable to those of the
recurrent parent, PB1.
A total of 82 background markers were used to evaluate recovery of
recurrent parent genome in each backcrossed generation.
Populations for AB-QTL analysis commonly use exotic or wild germplasm as the donor and elite germplasm as the
recurrent parent. The QTL analysis is conducted in the B[C.sub.2] or B[C.sub.3] generation to reduce the frequency of deleterious donor alleles.
First backcrosses ([BC.sub.1]) will have, on average, three quarters (0.75) of the resistance alleles of the
recurrent parent, if recombination can occur for all chromosome pairs.
Linoleate contents of B[C.sub.i][F.sub.2] seeds derived from a given
recurrent parent were sorted from lowest to highest and plotted in column graphs to permit visual inspection of the distributions.
Initial crosses between the
recurrent parent 'Karee' (PI 634773) and the resistance donors mentioned above were made in 1993.
However during the seed increases of these lines in 2002 at UC Davis we observed increased resistance to leaf rust in the Yecora Rojo Lr47 line (no infection) compared to the adjacent
recurrent parent Yecora Rojo (80% infection, susceptible reaction).
Genetic stock designations,
recurrent parent, brown midrib gene, and descriptive characteristics of sorghum brown midrib near-isolines averaged over four environments ([dagger]).
Since genetic drift may have occurred within the
recurrent parent inbred lines during multiple generations of maintenance at Lincoln, NE, seed of the
recurrent parents used by this project will be distributed with the genetic stocks to maximize similarity of nuclear genes in each set of lines in the various backgrounds.
barbadense chromosome substitution line involved three stages: (i) development of a TM-1--like hypoaneuploid stock that served as the TM-1-like
recurrent parent (Table 1), (ii) selective introgression of a G.