Abstract
Amur maackia ( Maackia amurensis Rupr. & Maxim.) has potential for use in small, urban, or cold landscapes. Although Amur maackia is becoming increasingly popular, plants are currently grown from open-pollinated seed populations, and there has been no selection of cultivars. We have addressed the effects of climate on growth and have begun field trials for selection of horticulturally superior genotypes. In May 1995, a field trial near Ames was begun with 337 plants. These were selected from more than 2000 greenhouse-grown seedlings to represent 32 half-sibling seed groups from 16 arboreta across North America. After two growing seasons, the increase in stem length among seed groups ranged from 3% to 75%. Survival rate did not vary with seed group. In a related study, 30 plants from six half-sibling groups have been established at each of 10 sites in the U.S. and four in Canada to assess effects of location on survival and growth. The influence of seed group on survival after 1 year varied with the trial site location. Survival among combinations of half-sibling group and trial location ranged from 0% to 100% (mean = 54%). Half-sibling group and trial location affected growth without interaction. The greatest growth across locations, an 83% increase in stem length, was shown by seeds that originated from a tree at the Arnold Arboretum. At the 14 locations, changes in stem length over half-sibling groups varied from <0% in Ithaca, N.Y., to 179% in Puyallup, Wash.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Stem-length increase among seed groups ranged from 3% to 75% after two seasons.
Verbatim
e0“After two growing seasons, the increase in stem length among seed groups ranged from 3% to 75%.”
e1“After two growing seasons, the increase in stem length among seed groups ranged from 3% to 75%.”
t0“Amur maackia”
Claim · model-written summary
Survival did not vary by seed group in the first trial.
Verbatim
e0“Survival rate did not vary with seed group.”
e1“Survival rate did not vary with seed group.”
t0“Amur maackia”
Claim · model-written summary
The effect of seed group on first-year survival varied among trial sites.
Verbatim
e0“The influence of seed group on survival after 1 year varied with the trial site location.”
e1“The influence of seed group on survival after 1 year varied with the trial site location.”
t0“Amur maackia”
Claim · model-written summary
Survival across seed-group and location combinations ranged from 0% to 100%.
Verbatim
e0“Survival among combinations of half-sibling group and trial location ranged from 0% to 100% (mean = 54%).”
e1“Survival among combinations of half-sibling group and trial location ranged from 0% to 100% (mean = 54%).”
t0“Amur maackia”
Claim · model-written summary
Seed group and trial location each affected growth without interaction.
- Taxon
- Amur maackiat0
- Material
- Half-sibling groupe0
- Outcome
- growthe0
- Qualifier
- without interactione0
- Setting
- trial locatione0
Not reportedDirection
Verbatim
e0“Half-sibling group and trial location affected growth without interaction.”
e1“Half-sibling group and trial location affected growth without interaction.”
t0“Amur maackia”
Claim · model-written summary
Arnold Arboretum seed had the greatest across-location stem growth, 83%.
Verbatim
e0“The greatest growth across locations, an 83% increase in stem length, was shown by seeds that originated from a tree at the Arnold Arboretum.”
e1“The greatest growth across locations, an 83% increase in stem length, was shown by seeds that originated from a tree at the Arnold Arboretum.”
t0“Amur maackia”
Claim · model-written summary
Stem-length change across seed groups was below 0% in Ithaca.
Not reportedDirection
Verbatim
e0“changes in stem length over half-sibling groups varied from <0% in Ithaca, N.Y., to 179% in Puyallup, Wash.”
e1“changes in stem length over half-sibling groups varied from <0% in Ithaca, N.Y., to 179% in Puyallup, Wash.”
t0“Amur maackia”
Claim · model-written summary
Stem-length change across seed groups reached 179% in Puyallup.
Not reportedDirection
Verbatim
e0“changes in stem length over half-sibling groups varied from <0% in Ithaca, N.Y., to 179% in Puyallup, Wash.”
e1“changes in stem length over half-sibling groups varied from <0% in Ithaca, N.Y., to 179% in Puyallup, Wash.”
t0“Amur maackia”