期刊
SCIENTIA HORTICULTURAE
卷 103, 期 2, 页码 167-177出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scienta.2004.04.017
关键词
germplasm; day-neutral; short day; long day; critical day-length; heat tolerance
类别
The temperature and photoperiod interactions of a number of elite genotypes of Fragaria virginiana, F. x ananassa, and F. chiloensis were studied in a series of growth chamber experiments. Several parameters were evaluated including: (1) the critical day-length (CDL) for flowering of short day (SD) genotypes under 8, 9, 10, and 11 h days at 18 degreesC (2) the floral and runnering response of single and multiple cropping genotypes under 8 and 16 h days at 18 degreesC. and (3) the effect of temperature on flower bud formation in day-neutral (DN) genotypes held at 18, 22, 26, and 30degreesC under 12 h day-lengths. The same number of flowers were initiated under 15 and 30 day induction periods, regardless of photoperiod. Frederick 9, LH 50-4 and RH 30 (F. virginiana), 'Aromas' and 'Tribute' (F. x ananassa) and CFRA 0368 of F. chiloensis flowered under both long days (LDs) and SDs; while Eagle- 14 (F. virginiana), 'Fort Laramie' and 'Quinalt' (F. x ananassa) flowered only under long days. While those genotypes that flowered under both LD and SD can be considered day-neutral, they varied in the degree of floral response to the two photoperiods. CFRA 0368 and Frederick 9 produced the same number of flowers under both LDs and SDs, while 'Aromas' and 'Tribute' had more flowers under LDs and RH 30 had more under SDs. Of the DN genotypes, LH 50-4 and RH 30 were the only ones that produced runners under SDs. Flowering in 'Fort Laramie' was least affected of any genotype by high temperature, although its dry weight was negatively impacted. Based on these data, several genotypes show promise as breeding parents: CFRA 0368 and Frederick 9 to equalize flower production under LD and SID conditions, LH 50-4 and RH 30 to produce more freely runnering DNs, and 'Fort Laramie' for floral heat tolerance. (C) 2004 Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据