Abstract
In Mexico, maize (Zea mays L.) is grown under rainfed conditions within immensurable number of variable environments that limit production. To cope with these adversities, genotypes of different genetic constitution have been generated, such as intervarietal crosses; however, knowledge of the yield potential of those crosses in variable environments is limited. The objective of the study was to determine the yield potential of intervarietal crosses of yellow maize in environments of high-valley lands in central Mexico, as well as the components that influence yield under the hypothesis that intervarietal crosses are equal in yield to conventional hybrids. Crosses, open-pollinated parental varieties and commercial controls were evaluated in a randomized complete block design. Fifteen agronomic variables and yield components were measured. A combined analysis of variance and comparison of means (Tukey, p ≤ 0.05) were applied, and Pearson’s correlation coefficients were calculated. The analysis of variance detected statistical differences in all the factors of variation in most of the evaluated variables. The intervarietal crosses performed statistically equal to the controls but superior to the parents. The crosses excelled in ear diameter and ear length, total weight of grains in the ear, 100-grain weight, grain length, grain width, plant height, ear height, shelling corn coefficient and prolificacy index. In 23 crosses, the genotype × environment interaction effect was not significant. Intervarietal crosses have yield potential compared to conventional hybrids. Ear and grain traits had the greatest influence on yield. Intervarietal crosses represent an alternative to increase yield and production of yellow maize in the high-valley lands of central Mexico.
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Claims 10
Claim · model-written summary
Most evaluated agronomic variables differed among factors of variation.
- Outcome
- most of the evaluated variablese0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The analysis of variance detected statistical differences in all the factors of variation in most of the evaluated variables.”
t0“yellow maize (Zea mays L.)”
Claim · model-written summary
Intervarietal crosses performed statistically equally to controls.
- Material
- intervarietal crossese0
- Outcome
- performed statistically equale0
- Direction
- statistically equale0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The intervarietal crosses performed statistically equal to the controls but superior to the parents.”
t0“yellow maize (Zea mays L.)”
Claim · model-written summary
Intervarietal crosses outperformed the parents.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The intervarietal crosses performed statistically equal to the controls but superior to the parents.”
t0“yellow maize (Zea mays L.)”
Claim · model-written summary
Crosses excelled in ear diameter, ear length and total grain weight per ear.
- Material
- crossese0
- Outcome
- ear diameter and ear length, total weight of grains in the eare0
- Direction
- excellede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crosses excelled in ear diameter and ear length, total weight of grains in the ear, 100-grain weight, grain length, grain width, plant height, ear height, shelling corn coefficient and prolificacy index.”
t0“yellow maize (Zea mays L.)”
Claim · model-written summary
Crosses excelled in 100-grain weight, grain length and grain width.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crosses excelled in ear diameter and ear length, total weight of grains in the ear, 100-grain weight, grain length, grain width, plant height, ear height, shelling corn coefficient and prolificacy index.”
t0“yellow maize (Zea mays L.)”
Claim · model-written summary
Crosses excelled in plant height, ear height and shelling corn coefficient.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crosses excelled in ear diameter and ear length, total weight of grains in the ear, 100-grain weight, grain length, grain width, plant height, ear height, shelling corn coefficient and prolificacy index.”
t0“yellow maize (Zea mays L.)”
Claim · model-written summary
Crosses excelled in prolificacy index.
- Outcome
- prolificacy indexe0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“prolificacy index”
t0“yellow maize (Zea mays L.)”
Claim · model-written summary
Genotype by environment interaction was not significant for 23 crosses.
- Material
- crossese0
- Outcome
- genotype × environment interaction effecte0
- Direction
- not significante0
- Value
- 23 crossese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 23 crosses, the genotype × environment interaction effect was not significant.”
t0“yellow maize (Zea mays L.)”
Claim · model-written summary
Ear and grain traits had the greatest influence on yield.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ear and grain traits had the greatest influence on yield.”
t0“yellow maize (Zea mays L.)”
Claim · model-written summary
The authors conclude that intervarietal crosses can increase yellow maize yield and production in central Mexico high valleys.
Verbatim
e0“Intervarietal crosses represent an alternative to increase yield and production of yellow maize in the high-valley lands of central Mexico.”