Details for: PI 690775, Medicago hybr., Alborea 301


Summary Data
Taxonomy:
Medicago hybr.
Top Name:
Alborea 301
Origin:
Developed – Wisconsin, United States
Received by NPGS:
25 Jun 2019
Improvement Status:
Breeding material
Reproductive Uniformity:

Population
Form Received:
Seed
Life Form:
Perennial
Life Cycle:
Perennial
Availability
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Seed100 countPI 690775 2019o SD
 
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Core Passport Data
Taxonomy:
Medicago hybr.
Top Name:
Alborea 301
Origin:
Developed – Wisconsin, United States
Received by NPGS:
25 Jun 2019
Improvement Status:
Breeding material
Reproductive Uniformity:

Population
Form Received:
Seed
Life Form:
Perennial
Life Cycle:
Perennial
Source History
Developed
PRE 04 June 2019.
Wisconsin, United States

Developer(s):
Donated
04 June 2019.
Wisconsin, United States

Donor(s):
Accession Names and Identifiers
Alborea 301
Type: Developer identifier
Bingham, Edwin T. University of Wisconsin

Narrative
Medicago arborea is a woody perennial bush, native to the Mediterranean region. M. arborea traits of interest include robust stature, large leaves, drought tolerance, large seeds, winter activity, and frost tolerance. Frost tolerance was unexpected, but M. arborea plants have been left in the field until early December, endured several frosts including minus 10C, and retained their green leaves when moved to the greenhouse. Surplus plants left in the field have been observed to grow shoots half meter tall into deep snow drifts. Thus, M. arborea plants are winter active and frost tolerant, as are some Alborea plants. The morphology of Alborea plants is variable, and ranges from resembling alfalfa to resembling M. arborea, with the majority of the plants somewhere in between. Many Alborea plants are more robust than alfalfa, with larger leaves and flowers, and larger pods and seeds. Alborea plants tend to have narrow crowns, and a more branching root system than alfalfa. About half of Alborea plants will have a range of variegated flower color due to the yellow from M. arborea and the purple from alfalfa. Most of the remainder will have either yellow or purple flowers, plus a few plants with cream flowers. Alborea seed production in the field isolation with wild bees is about 80% of alfalfa. If competing bloom of alfalfa is present, Alborea seed production is scant. Alborea crosses well with alfalfa in hand crosses in the greenhouse, thus germplasm can be easily transferred to alfalfa. Moreover, most Alborea X alfalfa progeny express positive heterosis.
Medicago hybr.
Genus:
Medicago
Family:
Fabaceae (alt. Leguminosae)
Subfamily:
Faboideae
Tribe:
Trifolieae
Nomen number:

300354
Comment:
interim designation used in GRIN for Medicago hybrids which lack an acceptable binomial
Verified:
11/02/1990 by ARS Systematic Botanists.
Other conspecific taxa
Autonyms (not in current use), synonyms and invalid designations
Common names
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Pedigree
Description:
Alborea 301 is derived from sexual hybrids of alfalfa X Medicago arborea. Both species are autotetraploids, 2n=4x=32 chromosomes. Only selected alfalfa genotypes produced hybrids when pollinated with pollen from M. arborea. Yellow flower color from M. arborea was used to identify hybrids, that were later confirmed with DNA analysis. The alfalfa parents were MBms, a male sterile plant from Magnum III X Blaser XL, and M8, a complex 3-way hybrid involving three diverse M. sativa genotypes, and three different tetraploid M. falcata genotypes (WISFAL PI 560333). The M. arborea parents were from PI 199254, 504540, 249937, and 330677. Full details are available on line in Medicago Genetic Reports, Vol. 5 onward, on line Journal: Plants MDPI 2:343-353, and Agricultural Science 28:40-46 (Journal of the Australian Inst. Ag. Sci. and Tech.-not on line). Twenty hybrids were produced since 2006, each retaining 8-15 percent M. arborea germplasm. Hybrids were intercrossed and advanced up to three generations in Alborea 301. M. arborea traits segregating in advanced generations indicate that most of the M. arborea genome is represented in Alborea 301.