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| Clinal variation in phyB2, a candidate gene for day-length-induced growth cessation and bud set, across a latitudinal gradient in European aspen (Populus tremula) |
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| Author(s): Ingvarsson PK, Garcia MV, Hall D, Luquez V, Jansson S |
| Source: GENETICS Volume: 172 Issue: 3 Pages: 1845-1853 Published: MAR 2006 |
| Times Cited: 31 References: 45 |
| Abstract: The initiation of growth cessation and dormancy represents a Critical ecological and evolutionary tradeoff between survival and growth in most. forest trees. The Most important environmental cue regulating the initiation of dormancy is a shortening of the photoperiod and phytochrome genes have been implicated in short-day-induced bud set and growth cessation in Populus. We characterized patterns of DNA sequence variation at the putative candidate gene phyB2 in 4 populations of European aspen (Populus tremula) and scored single-nucleotide polymorphisms in an additional 12 populations collected along a latitudinal gradient in Sweden. We also measured bud set from a subset Of these trees in a growth chamber experiment. Buds set. showed significant clinal variation With latitude, explaining similar to 90% Of the population variation in bud Set. A sliding-window scan of phyB2 identified six putative regions with enhanced population differentiation and four SNPs showed significant clinal variation. The clinal variation at individual SNPs is suggestive of all adaptive response in phyB2 to local photoperiodic conditions. Three of four SNPs showing clinal variation were located in regions With excessive genetic differentiation, demonstrating that searching for regions of high genetic differentiation call be useful for identifying sites putatively involved in local adaptation. |
| Document Type: Article |
| Language: English |
| Reprint Address: Ingvarsson, PK (reprint author), Umea Univ, Dept Ecol & Environm Sci, Umea Plant Sci Ctr, SE-89187 Umea, Sweden |
Addresses:
1. Umea Univ, Dept Ecol & Environm Sci, Umea Plant Sci Ctr, SE-89187 Umea, Sweden
2. Umea Univ, Dept Plant Physiol, Umea Plant Sci Ctr, SE-89187 Umea, Sweden |
| Publisher: GENETICS, 428 EAST PRESTON ST, BALTIMORE, MD 21202 USA |
| Subject Category: Genetics & Heredity |
| IDS Number: 030XG |
| ISSN: 0016-6731 |
| DOI: 10.1534/genetics.105.047522 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |