|Abstract or Summary
- Thirty-three genotypes of red fescue were selected on the
basis of diverse origin, anthesis date, and type of spreading from a
space-planted introduction nursery.
Open-pollinated, single-cross, and top-cross progeny
nurseries were established into a randomized block with four replications,
20, 9, 8 entries, respectively, with nine plants per entry
on two foot centers. Measured characteristics were plant
height, plant width, and seed yield per plant.
A polycross progeny row test nursery was established in a
randomized block with eight replications in which 17 entries were
assigned with rows 10 feet long. Measured characteristics for this
progeny test were panicle length, number of branches per panicle,
100-seed weight, 20 panicles seed yield, and seed yield per row.
Single-cross and top-cross progenies were compared with
their mean open-pollinated progeny performance, respectively.
The association between characters for various progeny testing
methods was measured by simple correlation coefficients.
The creeping type parents resulted in progenies with greater
width, height, and seed yield per plant than the non-creeping type
when the open-pollinated progeny test was used. Associations between
height, width, and seed yield in open-pollinated progeny were
positive and significantly correlated with each other. The behavior
in the open-pollinated progeny for seed yield was similar to the
polycross progeny row test. For these three characters, clonal
selection of parents may be effective.
In the single-cross progeny, the single-cross between
creeping and creeping was greater than any other combination for
plant width and seed yield. Frequently there was no significant
difference between combinations of crosses and among entries.
In the top-cross progeny, the creeping type crossed with the
non-creeping tester was the greatest in width and seed yield. For
all three characters, the creeping type crossed with the non-creeping
tester and the non-creeping type crossed with the creeping tester were
greater than any other combination. The open-pollinated progeny of
the creeping tester genotype was always greater than the open pollinated
progeny of the non-creeping tester genotype. In the comparison
of the top-cross with their mean open-pollinated progeny, the behavior of the top-cross progeny was quite different from their mean
open-pollinated progeny for all characteristics. The top-cross
method was desirable for the study of general and specific combining
ability. The study would suggest that genotypes can be quickly
identified by using the top-cross progeny test with a non-creeping
In the polycross progeny row test the creeping types which
came from two isolations were greater than the non-creeping types
for all five measured characteristics. Associations between the five
characteristics were positive and significantly correlated except the
correlation between 100-seed weight and seed yield per row.