Identifying plant architectural traits associated with yield under intercropping: Implications of genotype-cropping system interactions

S. C. Nelson, Robert H Robichaux

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Increased yields of some crops have resulted from indirect selection of plant architectural traits related to yield. This study examines the potential relationship between plant architecture and yield for a legume grown under intercropping. Field experiments were conducted in 1991 to examine the response of two cowpea (Vigna unguiculata (L.) Walp.) genotypes with contrasting plant habits to sole crop and intercrop with pearl millet (Pennisetum americanum (L.) Leeke), and to identify cowpea traits associated with yield under intercropping. The cultivar with a bush-type habit was higher yielding in sole crop, whereas the cultivar with a spreading habit was higher-yielding in intercrop. For F2 cowpea populations, pod number was most highly correlated with seed yield in intercrop. The number of branches and nodes, particularly in areas with increased access to light, and increased internode length were also important in intercrop. Selection for improved yield in sole crop may not necessarily lead to improved yield in intercrop, and different plant trails may be more appropriate for cultivars intended for use in intercrop than for those intended for use in sole crop.

Original languageEnglish (US)
Pages (from-to)163-170
Number of pages8
JournalPlant Breeding
Volume116
Issue number2
StatePublished - May 1997

Fingerprint

intercropping
cropping systems
plant architecture
Genotype
Pennisetum
Habits
cowpeas
genotype
crops
Pennisetum glaucum
cultivars
Fabaceae
Vigna unguiculata
Seeds
internodes
branches
seed yield
pods
crop yield
Light

Keywords

  • Genotype-environment interactions
  • Ideotype breeding
  • Indirect selection
  • Intercropping
  • Plant architecture
  • Vigna unguiculata

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science
  • Biotechnology

Cite this

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abstract = "Increased yields of some crops have resulted from indirect selection of plant architectural traits related to yield. This study examines the potential relationship between plant architecture and yield for a legume grown under intercropping. Field experiments were conducted in 1991 to examine the response of two cowpea (Vigna unguiculata (L.) Walp.) genotypes with contrasting plant habits to sole crop and intercrop with pearl millet (Pennisetum americanum (L.) Leeke), and to identify cowpea traits associated with yield under intercropping. The cultivar with a bush-type habit was higher yielding in sole crop, whereas the cultivar with a spreading habit was higher-yielding in intercrop. For F2 cowpea populations, pod number was most highly correlated with seed yield in intercrop. The number of branches and nodes, particularly in areas with increased access to light, and increased internode length were also important in intercrop. Selection for improved yield in sole crop may not necessarily lead to improved yield in intercrop, and different plant trails may be more appropriate for cultivars intended for use in intercrop than for those intended for use in sole crop.",
keywords = "Genotype-environment interactions, Ideotype breeding, Indirect selection, Intercropping, Plant architecture, Vigna unguiculata",
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