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Haofeng Chen, Vanessa E.T.M. Ashworth, Shizhong Xu, and Michael T. Clegg

understanding of the genetic determination of economically important traits. Usually commercially important traits of avocado, such as tree growth rate, fruit precocity, fruit quality, flavor, and so on, are controlled by multiple genes, and those of large

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Douglas D. Archbold

Abbreviations: AGR, absolute growth rate; DW, dry weight; RGR, relative growth rate; SAR, sorbitol accumulation. The investigation reported in this paper (no. 91-10-86) is in connection with a project of the Kentucky Agricultural Experiment Station

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Johannes Daniel Scharwies, Eckhard Grimm, and Moritz Knoche

fruits are particularly sensitive to russeting ( Knoche et al., 2011 ; Wertheim, 1982 ). From this we hypothesize that the incidence of russeting will be higher on surfaces subjected to high relative growth rates and vice versa. Pear fruit is a

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Candace N. DeLong, Keith S. Yoder, Leon Combs, Richard E. Veilleux, and Gregory M. Peck

apple exports into Asian markets ( Hansen, 2014 ). Other popular crabapple pollinizers include ‘Snowdrift’, ‘Thunderchild’, ‘Indian Summer’, ‘Mt. Blanc’, ‘Wickson Crab’, and ‘Chestnut Crab’. The pollen tube growth rate of ‘Snowdrift’ has been used to

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D.H. Willits, P.V. Nelson, M.M. Peet, M.A. Depa, and J.S. Kuehny

Abbreviations: RAR, relative accumulation rate; RGT, relative growth rate. 1 Professor, Dept. of Biological and Agricultural Engineering. 2 Professor, Dept. of Horticultural Science. 3 Associate Professor, Dept. of Horticultural Science. 4 Former

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Craig E. Kallsen and Dan E. Parfitt

Similar scion and rootstock growth rates produce strong graft unions in fruit and nut trees. A SRR close to one provides a strong graft union as well as a uniform exterior surface for trunk-shaking harvesters. ‘Kerman’, which has been the standard

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Martin P.N. Gent

included different minimum temperatures of 10 compared with 20 °C, harvested on 1 Apr. 2007 and 30 Nov. 2007. Otherwise, average temperatures varied from 14 °C in winter to 27 °C in summer. Table 2. Statistics for variables related to relative growth rate

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Elisa Solis-Toapanta, Paul Fisher, and Celina Gómez

grown in a greenhouse would produce more biomass and have higher nutrient uptake compared with those grown in an indoor environment because of faster growth rates induced by close-to-optimal environmental conditions. Materials and Methods Plant material

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Theodore M. DeJong

The growth and development patterns of fruit have been studied for many years and it has become traditional to think of peaches as having a double sigmoid pattern with three main stages fruit growth. This concept is primarily based on analyses of fruit absolute growth rates An alternative approach is to express growth on a relative growth rate (RGR) basis which is simply the weight increase perg of fruit weight per day. This analysis applied to dry-weight peach fruit growth results in a two-phase curve that is known mathematically as a Gompertz function. During the first growth phase the RGR decreases logarithmically and during the second phase the RGR remains relatively stable. Expressing fruit growth on a RGR basis is advantageous for fruit growth carbon budget modelling because RGR is directly related to respiration rates and for physiological studies because most analyses for physiologically active substances are expressed on a weight basis. There is obviously not only one “right” way to express fruit growth but it may be instructive to use the RGR approach particularly when studying factors that may be associated with “sink” activity.

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Yuki Sago

concentrations in the leaves ( Barta and Tibbitts, 1991 ; Struckmeyer and Tibbitts, 1965 ). Many researchers have reported that tipburn is associated with rapid growth rate and high calcium demand in leaves ( Collier and Tibbitts, 1982 ; Gaudreau et al., 1994