Andro-sterility of corn lines and hybrids in Valles Altos of Mexico.
DOI:
https://doi.org/10.15517/am.v14i1.11984Abstract
Lines combinations of andro-sterile
progenitors were evaluated to find genotypes with restoring
capacity during the years 1995 to 1997. Seven lines were
defined and verified to restore the male fertility. Also, some
hybrids with andro-sterile progenitors of excellent yield
(12230 kg/ha) and possibilities of commercial use (UHS95E0123
X P2-1) were located. The male fertility restoring
capacity (100%) of the lines P2-1, IA49-1, IA49-2, EHT-29-
1, EHT-49-3 were confirmed in progeny testing. Besides in
1997 and 1998, the isogenic versions were obtained with the
third and up to the fourth back-crosses, from the elite lines
from UNAM and the PUMAS female hybrids (in commercial
use as the PUMA 1157 and PUMA 1075). Also, there is a
version of the andro-sterile progenitors from INIFAP,
denominated as H-50 and H-48, recommended for the Valles
Altos; as well as some lines from CIMMYT, which could
favor the seed production of the hybrids that are generated
from these materials.
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