Hayes and Garber - Cucurbit Breeding

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GRASSES, CLOVER, AND ALFALFA 211
were obtained by this method. Another method is sometimes
used in clonally propagated rows. Each row is surrounded by
a fence about 10 ft. high made of finely woven cloth. This
method does not prevent some cross-pollination but it does bring
about a high degree of inbreeding. A tall growing crop, such as
rye, surrounding isolated plots prevents pollination with undesirable
strains or varieties.
As would be expected in dealing with a heterozygous
crop,
the self-fertilized seed of the various isolated clones produced
plants which showed considerable difference in their inheritance.
Some of the clones bred fairly true when reproduced by selfed
seed, others did not. Table L, taken from Webber et al (1912),
illustrates the transmission of yielding ability in some clones.
TABLE L. TRANSMISSION OF YIELD IN TIMOTHY BY CLONAL AND SEED \
PROPAGATION
Number of i
original plant
,
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