Developmental morphology of high yielding maize

• Project/Area Number: 58860003
• Research Category: Grant-in-Aid for Developmental Scientific Research
• Allocation Type: Single-year Grants
• Research Field: 作物
• Research Institution: Shinshu University (1985); Kyoto University (1983-1984)
• Principal Investigator: MINAMI Mineo (1985) 信州大学, 農, 助手 (30174098); 鳥越 洋一 (1983-1984) 京都大学, 農学部, 助手
• Project Period (FY): 1983 – 1985
• Project Status: Completed (Fiscal Year 1985)
• Budget Amount: ¥7,000,000 (Direct Cost: ¥7,000,000); Fiscal Year 1985: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 1984: ¥1,500,000 (Direct Cost: ¥1,500,000); Fiscal Year 1983: ¥4,500,000 (Direct Cost: ¥4,500,000)
• Keywords: maize / developmental morphology / growth phase / phytomer / ダイアレルクロス

Research Abstract

High yielding ability of maize hybrids were analyzed and compared with their parental lines by means of developmental morphological method using phytomer theory.
High yield in maize hybrids was resulted from increase of number of differentiated florets and keeping high ripening percentage which caused increasing number of ripened grains per ear and were correlated with leaf area enlargement in the third phytomer group that developed and had high activities during floret differentiation stage.
Diallel analysis of phytomer(group) composition showed that genetical control of morphological characteristics may be relatively easy. But it is necessary to breed parental lines which have wide variation in phytomer(group) composition.