Abstract
To improve the efficiency of introgressing genes from Lycopersicon hirsutum (H) into L. esculentum (E), environmental and genetic variation for the number of progeny per fruit from E x H crosses was quantified. Over three dates in a year, 36 H accessions were crossed to seven E accessions in a greenhouse. The proportion of total variation for the number of E x H progeny per fruit due to environment (dates, location, and error), H accession, E accession, interactions between E and H, and interactions between accessions and environments was 0.42, 0.26, 0.12, 0.11, and 0.09, respectively. Sampling greater numbers of fruit on a single date improved the efficiency of recovering progeny more than increased sampling over time. The specific combination of E and H parents can profoundly affect the number of E x H progeny recovered and therefore the efficiency of gene introgression. Accessions of H from the southern edge of the species' natural geographic range generally yielded few to zero progeny per fruit in crosses with E. In contrast to the southern H accessions, most northern accessions produced greater than 40 E x H progeny per fruit. Most genes within H should be readily accessible for tomato breeding but genes that are found only in southern H accessions may be challenging to introgress.
Original language | English (US) |
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Pages (from-to) | 185-191 |
Number of pages | 7 |
Journal | Euphytica |
Volume | 101 |
Issue number | 2 |
DOIs | |
State | Published - 1998 |
Externally published | Yes |
Keywords
- Crossability
- Interspecific hybridization
- Lycopersicon esculentum
- Lycopersicon hirsutum
- Tomato
ASJC Scopus subject areas
- Agronomy and Crop Science
- Genetics
- Plant Science
- Horticulture