Abstract
Thirty-six cultivars and 948 seedlings from 15 controlled crosses in the U.S. Dept. of Agriculture-Agricultural Research Service pecan [ Carya illinoinensis (Wangenh.) K. Koch] breeding program at Brownwood, Texas, were rated for susceptibility to nut scab [ Cladosporium caryigenum (Ell. et Lang.) Gottwald] to determine heritability of this trait. Differences between parents and progenies, and within progenies, were highly significant. Within most families, a complete range of resistance reactions were evident, from fully susceptible to fully resistant. Heritability of resistance was determined by regressing individual progeny values on female, male, and midparent values, with the midparent heritability estimate being the highest (0.54). This moderate level of additive gene action and the identification of superior parents in this study will contribute to the efficiency of breeding resistant cultivars.
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Claims 4
Claim · model-written summary
Pecan scab susceptibility differed significantly among parents and progenies and within progenies.
- Taxon
- Pecan
_1_(24790682337).jpg?width=60)
Carya illinoinensist0 - Outcome
- Differences between parents and progenies, and within progeniese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_1_(24790682337).jpg?width=500)
Verbatim
e0“Differences between parents and progenies, and within progenies, were highly significant.”
t0“Pecan”
Claim · model-written summary
Most pecan families spanned fully susceptible through fully resistant scab reactions.
- Taxon
- PecanCarya illinoinensist0
- Outcome
- complete range of resistance reactionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Within most families, a complete range of resistance reactions were evident, from fully susceptible to fully resistant.”
t0“Pecan”
Claim · model-written summary
The highest midparent estimate for pecan scab resistance heritability was 0.54.
- Taxon
- PecanCarya illinoinensist0
- Outcome
- midparent heritability estimatee0
- Direction
- higheste0
- Value
- 0.54e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the midparent heritability estimate being the highest (0.54)”
t0“Pecan”
Claim · model-written summary
The authors interpreted resistance as having moderate additive gene action and identified superior parents for breeding.
- Taxon
- PecanCarya illinoinensist0
- Outcome
- moderate level of additive gene action and the identification of superior parentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This moderate level of additive gene action and the identification of superior parents in this study will contribute to the efficiency of breeding resistant cultivars.”
t0“Pecan”