Abstract
Abstract A high degree of inheritance for resistance and susceptibility in sweet corn ( Zea mays L.) to acute ozone leaf injury under field conditions was shown during 2 and 3 generations of breeding with 3 series of cultivars. Crosses of highly susceptible × resistant inbreds gave notably susceptible F 1 's. F 2 families segregated quantitatively but extremes were sometimes recovered. Distribution in F 2 was skewed toward low injury. Resistant X resistant crosses gave almost fully resistant F 1 's and F 2 's. A study involving a second series of inbreds also showed a close relationship between susceptibility in a parent and in its derived F 1 's. Three generations of selection and inbreeding, beginning with a segregating population, resulted in near fixation in resistant sublines but showed continued segregation in progenies from susceptible selections.
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Claims 8
Claim · model-written summary
Ozone injury resistance and susceptibility showed high inheritance across generations.
Verbatim
e0“A high degree of inheritance for resistance and susceptibility in sweet corn ( Zea mays L.) to acute ozone leaf injury under field conditions was shown during 2 and 3 generations of breeding with 3 series of cultivars.”
Claim · model-written summary
Susceptible by resistant inbred crosses produced notably susceptible F1 plants.
Verbatim
e0“Crosses of highly susceptible × resistant inbreds gave notably susceptible F 1 's.”
e1“sweet corn ( Zea mays L.)”
Claim · model-written summary
F2 families segregated quantitatively, sometimes recovering extremes.
Verbatim
e0“F 2 families segregated quantitatively but extremes were sometimes recovered.”
e1“sweet corn ( Zea mays L.)”
Claim · model-written summary
F2 distribution skewed toward low injury.
Verbatim
e0“Distribution in F 2 was skewed toward low injury.”
e1“sweet corn ( Zea mays L.)”
Claim · model-written summary
Resistant by resistant crosses yielded almost fully resistant F1 and F2 plants.
Verbatim
e0“Resistant X resistant crosses gave almost fully resistant F 1 's and F 2 's.”
e1“sweet corn ( Zea mays L.)”
Claim · model-written summary
Parental susceptibility closely related to derived F1 susceptibility.
Not reportedDirection
Verbatim
e0“a close relationship between susceptibility in a parent and in its derived F 1 's”
e1“sweet corn ( Zea mays L.)”
Claim · model-written summary
Selection and inbreeding nearly fixed resistance in resistant sublines.
Verbatim
e0“Three generations of selection and inbreeding, beginning with a segregating population, resulted in near fixation in resistant sublines”
e1“sweet corn ( Zea mays L.)”
Claim · model-written summary
Progeny from susceptible selections continued segregating.
Verbatim
e0“showed continued segregation in progenies from susceptible selections”
e1“sweet corn ( Zea mays L.)”