more on maize and its growth
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More on Maize and Its Growth. Corn or Maize – Zea mays. Zea mays subsp. mexicana. Zea mays subsp. mays. Variation in ear size and kernel color from Mexican landraces of corn. Steps from Teosinte to Maize. - PowerPoint PPT PresentationTRANSCRIPT
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More on Maize and Its Growth
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Corn or Maize – Zea mays
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Zeamayssubsp.mexicana
Zeamayssubsp.mays
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Variation in ear size and kernel color fromMexican landraces of corn
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Steps from Teosinte to Maize1. Maize cobs do not shatter (fall apart) whereas teosinte ears shatter
when mature2. Each teosinte grain is netled in a hard, deep floral structure the
cupule and covered by a hard sheath (the glume). The grains of corn are naked and held outside a collapsed cupule
3. Each teosinte cupule contains a single fertile spikelet; maize cupules have two fertile spikelets
4. Teosinte cupules are arranged in 2 ranks (rows) but maize are in 4 to 10 rows
5. Teosinte has long primary branches that each ends in a male tassel and there are numerous tiny ears along each branch. Maize has short primary branches that end in a single ear – only a few ears per plant; male tassel at apex of plant
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Hugh Iltis – then and now
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Apical dominance
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Apical dominance
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Apical dominance
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Teosinte to Maize
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Feminized Tassels
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Feminized Tassels
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Sweet Corn Traditions
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Boiling Sweet Corn
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Traditional Consumption
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Grilling Sweet Corn
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Traditional Pop Corn Variety
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Corn Popping
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Squanto and Pilgrims
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North Eastern Native American Groups
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Three Sisters Mound System
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Three Sisters Mound System
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Three Sisters Planting Scheme
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Benefits of Three Sisters Mounds• In the Northeast where ground was frequently cold and damp in early
spring, mounds allowed the soil to warm up and drain more quickly• Mounds allowed an increase in soil organic matter by repeatedly
incorporating dead plant material with soil in mounds• Decomposition of dead plant material increased soil nutrients; also
growing beans which are N-fixers increased soil N for all plants in the mound
• Mounds minimized soil compaction (people did not walk on mounds, but around them) and reduced soil erosion as fields were not constantly plowed or dug up
• Mound system allowed easy regulation of plant spacing and plant populations