AGRIS

Data provider:

Icon data provider

The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Active (Data provider submitted metadata in the last calendar year)
Journal Article

Journal Article

Combining Abilities and Heterosis for Forage Yield among High-Yielding Accessions of the Alfalfa Core Collection  [2007]

Bhandari, H.S.; Pierce, C.A.; Murray, L.W.; Ray, I.M.;

Access the full text

Characterization of genetic parameters in plant germplasm repository populations can facilitate their utilization in commercial breeding programs. This study investigated genetic combining abilities and heterosis for forage yield among diallel hybrids derived from nine previously selected high-yielding accessions of the USDA-ARS National Plant Germplasm System core collection of alfalfa (Medicago sativa subsp. sativa L.). These accessions originated from Turkey, South Africa, Greece, Afghanistan, Israel, Uzbekistan, Mexico, Morocco, and the USA. Forage yield response of the parents and their hybrids was determined near Las Cruces, New Mexico. General combining ability (GCA) and specific combining ability (SCA) effects were significant. The magnitudes of the GCA effects were about 5% (<0.71 Mg ha-1) relative to the mean yield of the parents (15.4 Mg ha-1). The Turkey, Afghanistan, and Uzbekistan accessions demonstrated significant positive GCA effects. Accessions from Greece and Morocco demonstrated negative GCA effects. Six hybrids outperformed the average of six commercial cultivars. Five of these six hybrids demonstrated positive SCA effects. Midparent heterosis ranged from -17 to 17%. The results indicate that crossing between alfalfa populations possessing high per se performance and different fall regrowth responses is likely to produce a higher proportion of high-yielding hybrids in environments experiencing intermittent subfreezing winter conditions.
From the journal
Crop science
ISSN : 0011-183X

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
47
Issue:
2
Start Page:
665
End Page:
671
All titles:
"Combining Abilities and Heterosis for Forage Yield among High-Yielding Accessions of the Alfalfa Core Collection"@eng
Other:
"Includes references"
Loading...

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
47
Issue:
2
Start Page:
665
End Page:
671
All titles:
"Combining Abilities and Heterosis for Forage Yield among High-Yielding Accessions of the Alfalfa Core Collection"@eng
Other:
"Includes references"