Abstract
A nested Design I consisting of full‐sib and half‐sib families was used to study changes in genetic variances resulting from two selection systems in the ‘Krug’ yellow dent variety of maize ( Zea mays L.). Two populations derived from Krug on the basis of earlier Design I experiments were used. K (S 1 ) syn‐2 was developed by intercrossing S 1 progenies of the male parent of selected half‐sib families. The second population, K (FS) syn‐2 was developed by intercrossing remnant seed of selected full‐sib progenies. Both selected populations, K (FS) syn‐2 and K (S 1 ) syn‐2, were significantly higher yielding than the original variety, Krug. Design I matings were made within each of the two selected populations to provide evidence on changes in genetic variances that had occurred from the selection practiced. Selection resulted in a moderate decrease in genetic variance, with S 1 progeny and full‐sib selection producing, apparently, different changes in magnitude of genetic variances
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Claims 4
Claim · model-written summary
The full-sib selected maize population yielded significantly more than Krug.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both selected populations, K (FS) syn‐2 and K (S 1 ) syn‐2, were significantly higher yielding than the original variety, Krug”
t0“maize”
Claim · model-written summary
The S1 selected maize population yielded significantly more than Krug.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both selected populations, K (FS) syn‐2 and K (S 1 ) syn‐2, were significantly higher yielding than the original variety, Krug”
t0“maize”
Claim · model-written summary
Selection moderately decreased genetic variance in maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selection resulted in a moderate decrease in genetic variance”
t0“maize”
Claim · model-written summary
S1 progeny and full-sib selection apparently produced different magnitudes of genetic variance change.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S 1 progeny and full‐sib selection producing, apparently, different changes in magnitude of genetic variances”
t0“maize”