PRODUCTIVITY OF F-1 AND F-2 MAIZE (Zea mays L.) HYBRIDS IN THE HIGHLAND OF MEXICO
Por:
Tadeo-Robledo, Margarita, Zaragoza-Esparza, Job, Espinosa-Calderon, Alejandro, Turrent-Fernandez, Antonio, Zamudio-Gonzalez, Benjamin, Virgen-Vargas, Juan, Yazmine Mora-Garcia, K., Valdivia-Bernal, Roberto
Publicada:
1 feb 2016
Resumen:
In Mexico 8.5 million ha of maize (Zea mays L.) are sown each year.
Hybrid seed is used in about 25 % of this area, and in the rest, local
varieties (50 % genuine maize landraces and 25 % locally adapted,
improved varieties or advanced generations of hybrids). The hybrid seed
use is concentrated in areas of high productive potential. Each year
there is reluctance to acquire new seed due to its high cost. To verify
the yield of F-1 and F-2 hybrids, an evaluation was made of varieties
H-40, H-51 AE, H-57 AE and Puma 1167 in the spring -summer cycle of 2013
by the Cuautitlan Graduate Studies Department of UNAM. The experimental
design was complete randomized blocks with four replicates. The
statistical analysis was carried out in a factorial design with the
following factors: hybrids (4), population densities (2), generation F-1
and F-2 (2), as well as the hybrid interactions x F1F2, hybrids x PD,
F1F2 x PD, hybrids x F1F2 x PD. The analysis of variance detected highly
significant differences for yield among hybrids and generations F-1 and
F-2, and significant differences among population densities; none of the
interactions was significant. The CV was 12.0 % and the average value
was 8422 kg ha(-1). The F-1 generation yielded an average of 9040 kg
ha(-1)., and the F2, 7804 kg ha(-1). The hybrids with the highest yields
were Puma 1167 (9989 kg ha(-1)) and H-57 AE (8334 kg ha(-1)). Compared
to a population density of 70 000 plants ha(-1) (8765 kg ha(-1)), a
higher yield was obtained than with 55 000 plants ha(-1). The results
confirm that the use of the F-2 generation of seed is not desirable, due
to the decrease in productivity.
Filiaciones:
Tadeo-Robledo, Margarita:
UNAM, Fac Estudios Super Cuautitlan, Carretera Cuautitlan Teoloyucan,Km 2-5, Cuautitlan, Estado De Mexic, Mexico
Zaragoza-Esparza, Job:
UNAM, Fac Estudios Super Cuautitlan, Carretera Cuautitlan Teoloyucan,Km 2-5, Cuautitlan, Estado De Mexic, Mexico
Espinosa-Calderon, Alejandro:
INIFAP, Campo Expt Valle Mexico, Km 13-5 Carretera Los Reyes Texcoco, Texcoco 56250, Estado De Mexic, Mexico
Turrent-Fernandez, Antonio:
INIFAP, Campo Expt Valle Mexico, Km 13-5 Carretera Los Reyes Texcoco, Texcoco 56250, Estado De Mexic, Mexico
Zamudio-Gonzalez, Benjamin:
INIFAP, Campo Expt Valle Mexico, Km 13-5 Carretera Los Reyes Texcoco, Texcoco 56250, Estado De Mexic, Mexico
Virgen-Vargas, Juan:
INIFAP, Campo Expt Valle Mexico, Km 13-5 Carretera Los Reyes Texcoco, Texcoco 56250, Estado De Mexic, Mexico
Yazmine Mora-Garcia, K.:
UNAM, Fac Estudios Super Cuautitlan, Carretera Cuautitlan Teoloyucan,Km 2-5, Cuautitlan, Estado De Mexic, Mexico
Valdivia-Bernal, Roberto:
Univ Autonoma Nayarit, Tepic, Mexico
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