Navigation Links
Potential hemlock hybrids tolerant to invasive hemlock woolly adelgid
Date:11/10/2010

This release is available in Spanish.

New hemlock hybrids that are tolerant to the invasive insect known as hemlock woolly adelgid have been created by U.S. Department of Agriculture (USDA) scientists.

Geneticist Richard Olsen and horticulturist Sue Bentz of USDA's Agricultural Research Service (ARS) teamed up with Forest Service entomologist Mike Montgomery to breed and select these tolerant hybrids. Olsen and Bentz work in the U.S. National Arboretum's Floral and Nursery Plants Research Unit in Beltsville, Md. The arboretum is located in Washington, D.C., and is operated by ARS, the principal intramural scientific research agency of USDA.

Over the past few decades, two hemlocks native to the United States-Tsuga canadensis and Tsuga caroliniana-have been under attack by the small sucking insect Adelges tsugae, also known as the hemlock woolly adelgid (HWA). Originally from Asia, this aphid relative has spread to forests and backyards in 17 eastern states, killing hemlock trees and devastating natural ecosystems.

Under the direction of ARS geneticist Denny Townsend (now retired), the arboretum began a breeding program in the 1990s to develop hemlock hybrids tolerant to HWA. The scientists crossed hemlock species native to the United States with germplasm-collected in Asia-of hemlocks that have shown tolerance to the insect. Now, 10 years later, Olsen and Bentz have developed 140 hemlock hybrids, 108 of which are suitable for testing.

In 2006, Olsen and his colleagues began a multi-year field trial to test each hybrid's degree of tolerance to HWA. Testing more than 170 trees, the researchers artificially infested the hybrids by attaching HWA-infested branches to the hybrids' lower branches and securing them with mesh bags to prevent the insects from escaping. They found the species T. chinensis and its hybrids to be most tolerant to HWA.

Details of the scientists' studies have been published in the Journal of Economic Entomology, the Journal of Arboriculture and the Journal of the American Society for Horticultural Science.

The hybrids are appealing not only due to their tolerance, but because they have good vigor and shape. Still, the researchers have several years of testing to complete before they can release these hybrids.


'/>"/>

Contact: Stephanie Yao
stephanie.yao@ars.usda.gov
301-504-1619
United States Department of Agriculture -- Research, Education and Economics
Source:Eurekalert

Related biology news :

1. Engineered plants make potential precursor to raw material for plastics
2. UCLA researchers discover a potential target for therapy for patients with a deadly prostate cancer
3. University of Illinois researchers discover potential new virus in switchgrass
4. Grasses have potential as alternate ethanol crop, Illinois study finds
5. Researchers report advances vs. preeclampsia, including potential prediction
6. Faster CARS, less damage: NIST chemical microscopy shows potential for cell diagnostics
7. Novocure reports data showing TTF therapy in combination with chemotherapy has the potential to increase overall survival for patients with advanced non-small cell lung cancer
8. Brown licenses potential muscular dystrophy treatment to Tivorsan Pharmaceuticals
9. Stem cell research: What progress has been made, what is its potential?
10. Research heralds potential for early diagnosis of degenerative brain disorders
11. Potential HIV drug keeps virus out of cells
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/20/2016)... 2016   Valencell , the leading innovator ... STMicroelectronics (NYSE: STM), a global semiconductor leader serving ... today the launch of a new, highly accurate ... includes ST,s compact SensorTile turnkey multi-sensor ... sensor system. Together, SensorTile and Benchmark deliver the ...
(Date:12/16/2016)... , Dec. 16, 2016   IdentyTechSolutions America ... management products and solutions and a cutting-edge manufacturer ... that it is offering seamless, integrated solutions that ... entrance products. The solutions provide IdentyTech,s customers with ... their facilities from crime and theft. ...
(Date:12/16/2016)... YORK , Dec. 16, 2016 The global wearable ... USD 12.14 billion by 2021 from USD 5.31 billion in 2016, ... ... is mainly driven by technological advancements in medical devices, launch of ... rising preference for wireless connectivity among healthcare providers, and increasing focus ...
Breaking Biology News(10 mins):
(Date:1/19/2017)... , Jan. 19, 2017  ArmaGen, Inc., today ... , Ph.D., as chief executive officer, as well ... Dr. Schmidt brings to ArmaGen more than 17 years ... and development of biotherapeutics and pharmaceuticals. ... the diverse experience and skillset necessary to lead ...
(Date:1/19/2017)... ... January 18, 2017 , ... The American Medical Informatics Association ... Data Sharing Policy. Specifically, the nation’s leading informatics experts, said data sharing plans ... policy. AMIA recommended that NIH earmark funding for researchers to produce and execute ...
(Date:1/19/2017)... (PRWEB) , ... January 19, 2017 , ... FireflySci Inc. ... exponential rate. The tremendous growth is accounted to two main factors. The ... and the expanding network of vendors supplying FireflySci products all around the world. , ...
(Date:1/19/2017)... YORK , Jan. 18, 2017 ... to reach USD 92.9 billion by 2025, according ... Inc. Pharmaceutical industry has been adaptive of the ... as early as 2002. Among the services outsourced, ... forerunners. For instance, Johnson & Johnson was the ...
Breaking Biology Technology: