‘Lost Hills’: A New Pistachio Cultivar

Parfitt, Dan E.; Kallsen, Craig E.; Holtz, Brent A.; Maranto, Joseph

doi:10.21273/hortsci.43.1.247

Cited by 9 publications

(5 citation statements)

References 3 publications

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“…To test our hypothesis further, we expanded our analysis to an additional growing season in 2022 and included 'Lost Hills', which has a relatively high split rate similar to that of 'Golden Hills' (Parfitt et al 2008). As expected, at the transverse section, the kernel width, but not height, correlated with split rate, with both 'Lost Hills' and 'Golden Hills' having wider kernels than 'Kerman' (P < 0.001, one-way ANOVA) (Fig.…”

Section: Dorsal and Ventral Suture Regions Are Asymmetric In The Tran...mentioning

confidence: 99%

Difference in Kernel Shape and Endocarp Anatomy Promote Dehiscence in Pistachio Endocarp

Zhang,

Wang,

Chernikova

et al. 2023

J. Amer. Soc. Hort. Sci.

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A fully split shell in pistachio (Pistacia vera) is a trait that is preferred by consumers and is a criterion in evaluating the grade of the pistachio nut. However, although the expanding kernel has been hypothesized to provide the physical force needed for shell split, the mechanisms that control shell split remain unknown. Furthermore, it is intriguing how the shell, or endocarp, splits at the suture ridge when there is no clear dehiscence zone. The objectives of this study were 1) to identify traits associated with dehiscence in fruit in the high-split rate cultivar Golden Hills when compared with the lower split rate cultivar Kerman and determine the anatomic features associated with endocarp dehiscence at the suture region, and 2) to examine the effect of kernel shape on endocarp dehiscence. We determined that, despite the fact that the pistachio endocarp is composed primarily of a single type of polylobate sclerenchyma cell, specialization of cell shape and size at the suture site results in smaller, more flattened cells. We report there is a furrowing of the shell at the dorsal and apical suture sites, where dehiscence initiates. This furrowing is not observed at the ventral suture site or in the indehiscent fruit of Pistacia atlantica, a species that has been used as rootstock for P. vera. In addition, the size of the kernel in the sagittal axis (the width) is strongly associated with a greater split rate. Based on our results, a tentative model emerges in which, in the absence of specialized cell types, cell shape modification can create an anatomically distinct region that is mechanically weak in the endocarp for the initiation of dehiscence, whereas the force from the width of the kernel is necessary for the shell split rate difference as observed in cultivars.

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Section: Dorsal and Ventral Suture Regions Are Asymmetric In The Tran...mentioning

confidence: 99%

Difference in Kernel Shape and Endocarp Anatomy Promote Dehiscence in Pistachio Endocarp

Zhang,

Wang,

Chernikova

et al. 2023

J. Amer. Soc. Hort. Sci.

View full text Add to dashboard Cite

show abstract

“…To further test our hypothesis, we expanded our analysis to an additional growing season in 2022 and included 'Lost Hills', which has a relatively high split rate similar to that of 'Golden Hills' (Parfitt et al 2008). As expected, at the transverse section, the kernel width, but not height, correlated with split rate, with both 'Lost Hills' and 'Golden Hills' having wider kernels than 'Kerman' (P < 0.001, one-way ANOVA, Fig.…”

Section: Kernel Width In Transverse Section Is Associated With Increa...mentioning

confidence: 99%

Difference in Kernel Shape and Endocarp Anatomy Promote Dehiscence in Pistachio Endocarp

Zhang,

Wang,

Chernikova

et al. 2023

Preprint

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A fully split shell in pistachio (Pistacia vera) is a trait that is preferred by consumers and is a criterion in evaluating the grade of the pistachio nut. However, while the expanding kernel has been hypothesized to provide the physical force needed for shell split, the mechanisms that control shell split remains unknown. Furthermore, it is intriguing how the shell, or endocarp, splits at the suture ridge when there is no clear dehiscence zone. The objectives of this study were to 1) identify traits associated with dehiscence in fruit in the high split rate cultivar Golden Hills when compared to the lower split rate cultivar Kerman and determine the anatomical features associated with endocarp dehiscence at the suture region, and 2) examine the effect of kernel shape on endocarp dehiscence. We determined that despite of the fact that the pistachio endocarp is primarily composed of a single type of polylobate schlerenchyma cell, specialization of cell shape and size at the suture site results in smaller, more flattened cells. We report that there is a furrowing of the shell at the dorsal and apical suture site, where dehiscence initiates. This furrowing is not observed at the ventral suture site or in the indehiscent fruit of Pistacia atlantica, a species that has been used as rootstock for P. vera. In addition, the size of the kernel in the sagittal axis (the width) is strongly associated with higher split rate. Based on our results, a tentative model emerges where, in the absence of specialized cell types, cell shape modification can create an anatomically distinct region that is mechanically weak in the endocarp for the initiation of dehiscence, while the force from the width of the kernel is necessary for the shell split rate difference as observed in cultivars.

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“…We evaluated the growth and production characteristics of six pistachio cultivars bred, patented, technically described and released by UC. These cultivars are the females 'Golden Hills' (Parfitt et al 2007), 'Lost Hills' (Parfitt et al 2008) and 'Gumdrop' (Kallsen and Parfitt 2017) and the males 'Randy' (Parfitt et al 2010), 'Famoso' (Kallsen and Parfitt 2018) and 'Tejon' (Kallsen and Parfitt 2019). Data were collected from six trials in the southern San Joaquin Valley (table 1), although not all cultivars were present in all trials (table 2).…”

Section: Six Trials In San Joaquin Valleymentioning

confidence: 99%

UC pistachio cultivars show improved nut quality and are ready for harvest earlier than ‘Kerman’

Kallsen¹,

Parfitt²,

Maranto³

2020

Calif Agr

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California pistachio growers have traditionally grown only one female cultivar (‘Kerman’) and one male pollenizer (‘Peters’). Starting in 2005, the UC breeding program released several improved cultivars, which are being planted on increasing acreage — and tested now under commercial conditions at multiple sites over multiple years. We conducted six experimental trials in the San Joaquin Valley to evaluate the performance of the UC cultivars ‘Gumdrop’, ‘Golden Hills’ and ‘Lost Hills’ and their associated UC male pollenizers ‘Famoso’, ‘Randy’ and ‘Tejon’ against the performance of the traditional pair, ‘Kerman’ and ‘Peters’. The new cultivars demonstrated a range of earlier bloom and harvest dates than ‘Kerman’ and some improved nut quality characteristics, such as a higher percentage of split, in-shell nuts. Results indicate that by growing the new female cultivars and synchronous pollenizers, producers can avoid the peak harvest period for ‘Kerman’, when equipment and processing facilities are limited, and maintain or improve their yield and nut quality.

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‘Lost Hills’: A New Pistachio Cultivar

Cited by 9 publications

References 3 publications

Difference in Kernel Shape and Endocarp Anatomy Promote Dehiscence in Pistachio Endocarp

Difference in Kernel Shape and Endocarp Anatomy Promote Dehiscence in Pistachio Endocarp

Difference in Kernel Shape and Endocarp Anatomy Promote Dehiscence in Pistachio Endocarp

UC pistachio cultivars show improved nut quality and are ready for harvest earlier than ‘Kerman’

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