The use of SSRs for the identification of unknown Asian pear cultivars

Three Asian pear plantings were set during the past decade. Plantings included an initial cultivar planting on OH × F rootstock, the SE Zonal planting, and a rootstock by cultivar factorial. Fireblight susceptibility and survival were assessed in the first two plantings following a summer hailstorm. Trees were compared to Magness, a blight-tolerant buttery pear. Shin Li, Daisu Li, Shinsui, and Olympic were more resistant than Magness, while Chojuro and Niitaka were nearly as tolerant. Eleven other cultivars showed greater field-susceptibility. The most-susceptible cultivars were Ya Li and Ts'e Li. The third planting, which was managed “organically,” was set at a different University farm. Trees there were precocious and productive. A high percentage of marketable fruit was picked from that planting over a 4-year period. Fireblight damage in this planting was low, despite its “organic” production. Limited damage was attributed to early bloom date, ground cover management, and a lack of insect vectors to transmit the bacteria. Hosui, Seuri and Ts'e Li produced large-sized fruit. Shinko, 20th Century, Ya Li and Shinseiki fruit were too small to be marketable without heavy hand-thinning. Asian pears are an interesting alternative crop which are suited to direct-market enterprises or to specialty growers interested in producing organic fruit in the mid-Atlantic region.

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The influence of water deficit on water relations, photosynthesis and fruit growth in Asian pear (Pyrus serotina Rehd.)

Scientia Horticulturae ◽

10.1016/0304-4238(94)90064-7 ◽

1994 ◽

Vol 60 (1-2) ◽

pp. 89-99 ◽

Cited By ~ 24

Author(s):

M.H. Behboudian ◽

G.S. Lawes ◽

K.M. Griffiths

Keyword(s):

Water Deficit ◽

Water Relations ◽

Fruit Growth ◽

Asian Pear ◽

Influence Of Water ◽

Pyrus Serotina

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α-Farnesene and antioxidative enzyme systems in Asian pear (Pyrus serotina Rehd.) fruit

Postharvest Biology and Technology ◽

10.1016/j.postharvbio.2010.09.002 ◽

2011 ◽

Vol 59 (3) ◽

pp. 227-231 ◽

Cited By ~ 12

Author(s):

Navid Yazdani ◽

Kazem Arzani ◽

Younes Mostofi ◽

Maryam Shekarchi

Keyword(s):

Antioxidative Enzyme ◽

Enzyme Systems ◽

Asian Pear ◽

Pyrus Serotina

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The use of the nonlinear models in the growth of pears of ‘Shinseiki’ cultivar

Ciência Rural ◽

10.1590/0103-8478cr20161097 ◽

2017 ◽

Vol 48 (1) ◽

Cited By ~ 4

Author(s):

Thais Destefani Ribeiro ◽

Taciana Villela Savian ◽

Tales Jesus Fernandes ◽

Joel Augusto Muniz

Keyword(s):

Logistic Model ◽

Least Squares Method ◽

Nonlinear Models ◽

Logistic Models ◽

Information Criterion ◽

Fruit Weight ◽

Coefficient Of Determination ◽

Pear Fruit ◽

Asian Pear ◽

Residual Correlations

ABSTRACT: The goal of this study was to elucidate the growth and development of the Asian pear fruit, on the grounds of length, diameter and fresh weight determined over time, using the non-linear Gompertz and Logistic models. The specifications of the models were assessed utilizing the R statistical software, via the least squares method and iterative Gauss-Newton process (DRAPER & SMITH, 2014). The residual standard deviation, adjusted coefficient of determination and the Akaike information criterion were used to compare the models. The residual correlations, observed in the data for length and diameter, were modeled using the second-order regression process to render the residuals independent. The logistic model was highly suitable in demonstrating the data, revealing the Asian pear fruit growth to be sigmoid in shape, showing remarkable development for three variables. It showed an average of up to 125 days for length and diameter and 140 days for fresh fruit weight, with values of 72mm length, 80mm diameter and 224g heavy fat.

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Effect of dormancy breaking chemicals on flowering, fruit set and quality in Asian pear (Pyrus pyrifolia L.)

African Journal of Agricultural Research ◽

10.5897/ajar2013.8047 ◽

2014 ◽

Vol 9 (1) ◽

pp. 56-60

Author(s):

B.R. Jana, ◽

B Das,

Keyword(s):

Fruit Set ◽

Pyrus Pyrifolia ◽

Dormancy Breaking ◽

Asian Pear

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Estimate of Leaf Chlorophyll and Nitrogen Content in Asian Pear (Pyrus serotina Rehd.) by CCM-200

Notulae Scientia Biologicae ◽

10.15835/nsb315623 ◽

2011 ◽

Vol 3 (1) ◽

pp. 91-94 ◽

Cited By ~ 14

Author(s):

Mostafa GHASEMI ◽

Kazem ARZANI ◽

Abbas YADOLLAHI ◽

Shiva GHASEMI ◽

Saadat SARIKHANI KHORRAMI

Keyword(s):

Nitrogen Content ◽

Leaf Chlorophyll ◽

Asian Pear ◽

Pyrus Serotina

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AGROCLIMATIC ZONING OF EUROPEAN AND ASIAN PEAR CULTIVARS WITH POTENTIAL FOR COMMERCIAL PLANTING IN SOUTHERN BRAZIL

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452017312 ◽

2017 ◽

Vol 39 (2) ◽

Author(s):

MARCOS SILVEIRA WREGE ◽

IVAN DAGOBERTO FAORO ◽

FLÁVIO GILBERTO HERTER ◽

CRISTINA PANDOLFO ◽

IVAN RODRIGUES DE ALMEIDA ◽

...

Keyword(s):

Fruit Quality ◽

Climate Risk ◽

Southern Brazil ◽

Climatic Zones ◽

Local Conditions ◽

Asian Pear ◽

Commercial Interest ◽

The World ◽

Chilling Hours ◽

Production Problems

ABSTRACT Pear is among the fruits of major commercial interest in the world and one of the most imported in Brazil. Brazilian production is very small and the fruit quality is low, due to production problems. The success of culture in the country, among other factors, may be linked to the choice of cultivars, pollinating and rootstocks better adapted to local conditions, and thus depend on the particulars of an agricultural zoning. The aim of this study was to identify, in southern Brazil, homogeneous climatic zones with potential for growing of European and Asian pears, through climate risk studies. The regions were defined by the seasonal availability of chilling hours (<7.2 °C) accumulated during the period from May to September and the monthly risk of drought. The analysis allowed the recognition of four homogeneous areas for the production of pears in southern Brazil.

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Sex Attractant of a Clearwing Moth Synanthedon Nashivora (Lepidoptera: Sesiidae)

10.21203/rs.3.rs-168695/v1 ◽

2021 ◽

Author(s):

Hideshi Naka ◽

Takahiro KUKIZAKI ◽

Susumu TOKUMARU ◽

Satoshi OHNO ◽

Yuki MATSUI

Keyword(s):

Sex Pheromones ◽

Sex Attractant ◽

Novel Species ◽

Seasonal Occurrence ◽

Screening Tests ◽

Mixture Ratio ◽

Asian Pear ◽

Clearwing Moth

Abstract A sex attractant of Synanthedon nashivora Naka and Yano, a pest of Asian pear discovered in Kyoto, Japan in 2014 and described as a novel species in 2019 was revealed. Pheromone lures baited mixtures with one or two of the seven compounds used as sex pheromones by Sesiidae species were prepared, and screening tests were conducted using these lures in pear orchards in Kyotango City, Kyoto Prefecture, Japan, from 2017 to 2018. Males were attracted to various mixture ratios, especially 7:3 mixture ratio, of (3Z,13Z)-3,13-octadecadienyl acetate (Z3,Z13-18:OAc) and (2E,13Z)-2,13-octadecadienyl acetate (E2,Z13-18:OAc) mixtures. This finding will enable monitoring of this species in Asian pear orchards. By attempting to search for males in the field using this pheromone lure, it will be possible to understand the distribution of this species in Japan and neighboring countries, its microhabitat, and the seasonal occurrence of this species.

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