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Nathan C. Phillips, Steven R. Larson, and Daniel T. Drost

( Adair et al., 2006 ; Hellier, 2000 ). Growers depending on wild seed collection would benefit from understanding genetic variation in wild populations across the natural landscape. Knowing the extent of genetic diversity within and among populations

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Uttara C. Samarakoon, Keith A. Funnell, David J. Woolley, and Edward R. Morgan

and, additionally, can have a long harvest window. Anecdotally, the variation has been observed among cultivars, and among plants of the same cultivar. This variation in harvest maturity makes it difficult to schedule harvest operations and target high

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Tao Wang, Ruijie Hao, Huitang Pan, Tangren Cheng, and Qixiang Zhang

detect and verify changes in the mRNA expression levels of genes at different developmental stages ( Koo et al., 2010 ; Vaucheret et al., 2004 ) and under various abiotic stress ( Borges et al., 2012 ; Du et al., 2013 ). Normalized quantification of

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Denise V. Duclos and Thomas Björkman

responsiveness, variation in the sensitivity to GA among the tissues to which GA was applied, variation in sensitivity during the developmental stage at application, or variable sensitivity to the bioactive GA. The GA pathway can promote, inhibit, or have no

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Ryan J. Hayes and Yong-Biao Liu

variation within lettuce for shelf life are needed. The objectives of this research were to determine the genetic variation for shelf life of salad-cut lettuce in low-O 2 MA environments and to develop rapid evaluation methods suitable for a lettuce

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Sadanand A. Dhekney, Zhijian T. Li, Michael E. Compton, and Dennis J. Gray

displayed embryogenic competence and wide variations among responsive varieties were observed. To improve embryogenic competence and produce cultures that result in genetically stable regenerants, factors that influence somatic embryogenesis, including

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Justin A. Porter, Hazel Y. Wetzstein, David Berle, Phillip A. Wadl, and Robert N. Trigiano

populations are generally small, i.e., usually less than 50 individuals, and are geographically isolated from each other ( Porter, 2010 ). Critical to its conservation is an understanding of how much genetic variation exists in the species. Genetic diversity

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Uttara C. Samarakoon, David J. Woolley, Ed R. Morgan, and Keith A. Funnell

hypothesized as a possible reason for variation in timing and quality of shoot emergence and flowering. Exogenous application of GA 3 is known to replace ( Dahanayake and Galwey, 1999 ), or partially replace ( Zieslin and Geller, 1983 ) chill unit requirements

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Ryan M. Warner

. (1999) determined that increasing DLI reduced the length of the juvenile phase of petunia ‘Express Blush Pink’. The time required for developmental processes to occur in plants is primarily a function of accumulated thermal time, often quantified as

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Rui Wang, Masatake Eguchi, Yuqing Gui, and Yasunaga Iwasaki

), medium LED (150 µmol·m −2 ·s −1 ), and low LED (400 µmol·m −2 ·s −1 )] were compared with a nonilluminated treatment (control). Supplemental LED lights were set from 8:00 am to 6:00 pm in the experimental period. Variations of daily light integral