Breeding for Improved Yield in Cucumber

Wehner, Todd C.

doi:10.1002/9781118061039.ch8

Cited by 23 publications

(14 citation statements)

References 73 publications

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“…Thus, in cucumber, MAS could be cost-effective for improving overall selection efficiency for yield and quality depending on the traits examined and their genetic nature (gene number and action, linkage associations, heritability, etc.). Yield in cucumber is quantitatively inherited, has a low heritability [i.e., narrow-sense heritability of 0.07-0.25], and is influenced by environment and to a lesser degree by genotype 9 environment interactions (Wehner 1989). Heritability (h 2 B) for yield as estimated herein (F 3 -F 5 family performance) was relatively low (0.22-0.45) across cycles of selection.…”

Section: Discussionmentioning

confidence: 99%

“…Likewise, the number of fruit per plot was recorded for each harvest, and these data were used to calculate the cumulative four-harvest yield per entry. The first harvest interval of each plot was determined when two to three fruit [51 mm in diameter (oversized) were observed within a plot (Wehner 1989). The remaining three harvest intervals occurred every 6-7 days when 2-3 mature oversized fruits were observed within a plot.…”

Section: Development and Evaluation Of F 3 Progenymentioning

confidence: 99%

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Response to phenotypic and marker-assisted selection for yield and quality component traits in cucumber (Cucumis sativus L.)

et al. 2009

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Two cucumber recombinant inbred lines (RILs) differing in plant habit were crossed and progeny self-pollinated to produce F 3 individuals upon which phenotypic selection was practiced to identify a base population which in turn underwent either two cycles of MAS or random mating without selection (RAN). MAS and RAN were practiced to produce F 4 and F 5 progeny sets. RIL, crossing parents, and F 3 -F 5 progeny sets were then evaluated under replicated field conditions for fruit yield and quality (L:D and E:T) to evaluate gain from selection (DG). The broad-sense heritability (h 2 B) over cycles (C) of selection ranged 0.22-0.45, 0.09-0.20, and 0.11-0.15 for yield, L:D, and E:T, respectively. Although one cycle of PHE selection followed by MAS was effective in conserving the performance of the traits examined during inbreeding, progeny performance during RAN fluctuated (F 4 -F 5 generation; C 2 ). Lack of DG during advanced generations (F 4 -F 5 ) of MAS was likely due to allelic fixation and/or optimized epistatic complementation.

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Section: Discussionmentioning

confidence: 99%

Section: Development and Evaluation Of F 3 Progenymentioning

confidence: 99%

Response to phenotypic and marker-assisted selection for yield and quality component traits in cucumber (Cucumis sativus L.)

et al. 2009

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“…This correlation, in fact, often increases during continued selection (from r = 0.67 to 0.82), which led Cramer and Wehner (2000b) to suggest that efforts to improve yield in cucumber should focus on increasing lateral branch number. Selection could be effective for this trait, since it is controlled by relatively few additive genes ( *4-5;Wehner 1989;Serquen et al 1997;Fazio et al 2003a) that possess varying degrees of heritability [narrow-sense heritability (h 2 ) from 0.00 to 0.61] depending on the population exploited Staub 2009, 2008).…”

Section: Phenotypic Diversitymentioning

confidence: 99%

Marker-assisted backcross selection in an interspecific Cucumis population broadens the genetic base of cucumber (Cucumis sativus L.)

et al. 2010

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Cucumber (Cucumis sativus L.) is a major cucurbit vegetable species whose genetic base has been drastically reduced during its domestication. The crop's narrow genetic base (3-12% DNA polymorphism) has resulted from the use of limited genetic material and intense selection during plant improvement. Recently, however, interspecific hybridization has been successful in Cucumis via mating of C. hystrix Chakr. and C. sativus, which resulted in the amphidiploid C. hytivus. We report herein a marker-assisted strategy for increasing genetic diversity in cucumber through introgression backcrossing employing C. hytivus. The comparatively late-flowering but high-yielding, indeterminate, monoecious line WI 7012A (P 1 ; donor parent) derived from a C. hytivus 9 C. sativus-derived line (long-fruited Chinese C. sativus cv. Beijingjietou) was initially crossed to the determinate, gynoecious C. sativus line WI 7023A (P 2 ; recurrent parent 1), and then advanced backcross generation progeny (BC 2 ) were crossed with the gynoecious indeterminate line WI 9-6A (P 3 ; recurrent parent 2). More specifically, a single F 1 individual (P 1 9 P 2 ) was backcrossed to P 2 , and then BC progeny were crossed to P 2 and P 3 , where markerassisted selection (MAS) for genetic diversity (8 mapped and 16 unmapped markers; designated Sel) or no selection (designated NSel) was applied to produce BC 3 P 2 (Sel) and BC 3 P 3 (Sel), and BC 2 P 2 (NSel) and BC 2 P 2 S 1 (NSel) progeny. Relative vegetative growth, number of lateral branches (LB), days to flowering (DF), yield (fruit number), and fruit quality [as measured by length:diameter (L:D) and endocarp:total diameter (E:T) ratios] were assessed in parents and cross-progeny. DF varied from *20 (BC 3 P 2 Sel) to *25 days (BC 2 P 3 Sel) among the populations examined, where progeny derived from P 2 possessed the shortest DF. Differences in cumulative yield among the populations over six harvests were detected, varying from *8 fruits per plant in BC 3 P 2 (Sel) to *39 fruits per plant in BC 2 P 3 (Sel). Although the vigorous vegetative growth of line P 1 was observed in its backcross progeny, highly heterozygous and polymorphic backcross progeny derived

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“…According to Scurtu et al (2016), high protected cultivation area will expand from 7,500 ha currently to 20,000 ha in 2020. To enhance the economic feasibility of growing pickling cucumber under high tunnels necessitates the use of high yielding cultivars (Wehner, 1989), improved diseases resistance (Peterson, 1975), and improvement of cultural practices (fertilization, irrigation etc) (Shetty and Wehner, 2002;Jilani et al, 2009). The use of high tunnels for vegetable crops continued to expand over the past five years (Lamont, 2009) due to the low start-up and operating costs, and the quick rate of return on investment.…”

Section: Plant Sampling and Biometrical Determinationsmentioning

confidence: 99%

Phosphorus, Potassium and Nitrate Contents in Fruit of Pickling Cucumbers Grown in a High Tunnel

Neaţă

Hoza

Teodorescu

et al. 2016

Not Bot Horti Agrobo

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Pickling cucumbers are highly important both for fresh consumption and for canning industry. This study aimed to compare differences in yield and quality of eight pickling cucumber cultivars, including 'Cor 12004', 'IGG 2010', 'IGG 2020', 'SM 5322', 'SM 5323', 'Zayin 201', 'Zayin 175201' and 'Trilogy'. The cucumber cultivars were laid out in a high tunnel crop and evaluated for vegetative traits (i.e. vine length, nodes per vine and branches per vine), yield attributes (i.e. fruits per main stem, average weight of fruit and fruits weight per plant) and fruits quality components (nitrate, phosphate and potassium mg kg -1 ). The results showed significant differences (P<0.05) in vegetative traits and yield attributes among cultivars. The analysis of correlation coefficients revealed that total yield (kg ha -1 ) was positively correlated with two out of three vegetative traits (with exception nodes per plant) and with all yield attributes. The highest total yield (101.17 t ha -1 ) was reached by 'SM 5322' cultivar, followed by the 'IGG 2010' and 'SM 5323' cultivars. The nitrates content in fruits, assessed on three categories of length (6-9 cm, 9-12 cm and >12 cm), revealed a declining value with increase in the cucumber length. The study findings suggest that irrespective of the cultivar, the amount of nitrate was higher in shorter cucumbers (6-9 cm length) although all recorded values (between 192.7 and 364.3 mg kg -1 fresh matter) being under maximum accepted limit concentrations. The amount of phosphate was higher in medium to long cucumbers, while the amount of potassium was higher in shorter cucumbers.

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Breeding for Improved Yield in Cucumber

Cited by 23 publications

References 73 publications

Response to phenotypic and marker-assisted selection for yield and quality component traits in cucumber (Cucumis sativus L.)

Response to phenotypic and marker-assisted selection for yield and quality component traits in cucumber (Cucumis sativus L.)

Marker-assisted backcross selection in an interspecific Cucumis population broadens the genetic base of cucumber (Cucumis sativus L.)

Phosphorus, Potassium and Nitrate Contents in Fruit of Pickling Cucumbers Grown in a High Tunnel

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