Heritability of fruit shape in pears

Heritabilities for each of three different height and width ratios describing fruit shape were estimated from measurements on a population of seedlings comprising 17 families of European and Asian pear parentage in the Hort Research pear cultivar breeding programme. In families with European cultiva...

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Bibliographic Details
Published in:	Euphytica Vol. 112; no. 1; pp. 1 - 7
Main Authors:	WHITE, A. G, ALSPACH, P. A, WESKETT, R. H, BREWER, L. R
Format:	Journal Article
Language:	English
Published:	Dordrecht Springer 01-01-2000 Springer Nature B.V
Subjects:	Agronomy. Soil science and plant productions Biological and medical sciences Cultivars Fruits Fundamental and applied biological sciences. Psychology Genetic improvement Genetics Genetics and breeding of economic plants Heritability Offspring Pears Plant breeding Pyrus communis Seedlings Variance analysis Varietal selection. Specialized plant breeding, plant breeding aims Yield, quality, earliness, varia New Zealand Asia Europe Oceania Pyrus communis Shape Rosaceae Genetic parameter Dicotyledones Angiospermae Selection pressure Developmental stage Calculation Height Fruit tree Width Genetic gain Statistical analysis Pear Fruit Varietal selection Seedlings Progeny Phenotype Morphology Genetic improvement Spermatophyta Heritability Curvature Cultivar
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Summary:	Heritabilities for each of three different height and width ratios describing fruit shape were estimated from measurements on a population of seedlings comprising 17 families of European and Asian pear parentage in the Hort Research pear cultivar breeding programme. In families with European cultivars as parents, the pyriform curvature in the upper, or stem end, half of the fruit was also quantified and heritabilities estimated. Heritabilities were computed using parent-offspring regression and from consideration of the variance components. Heritabilities estimated from parent-offspring regression were generally high and higher than those estimated from variance component analysis, although within the limits of error. Heritability estimates for the height: maximum width ratio were > 0.5 by both methods of estimation indicating that fairly rapid genetic gain could be expected.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0014-2336 1573-5060
DOI:	10.1023/A:1003761118890