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Cultivar mixtures: a means of exploiting morpho-developmental differences among cultivated groundnuts

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Relation http://oar.icrisat.org/3740/
http://dx.doi.org/10.1016/0378-4290(88)90043-3
 
Title Cultivar mixtures: a means of exploiting morpho-developmental differences among cultivated groundnuts
 
Creator Rattunde, H F
Ramraj, V M
Williams, J H
Gibbons, R W
 
Subject Groundnut
 
Description Groundnut (Arachis hypogaea L.) cultivars vary greatly in maturity and growth habit. This morphological and developmental variability may provide opportunities for greater kernel and haulm yields by sowing mixtures of cultivars that interact synergistically. We used two genotypes from each of four growth-habit classes (Spanish, Valencia, Virginia bunch, and Virginia runner) to form two-cultivar (1:1) mixtures representing diverse maturity and growth-habit combinations. The mixtures, 12 in the 1983–1984 dry season, and 28 in the 1984 rainy season, were sown at three and two plant densities, respectively. Land Equivalent Ratios (ler) of mixtures showed that overcompensation was more frequent than undercompensation. The largest lers were 1.23 for pod yield, 1.29 for kernel yield, and 1.18 for haulm yield average over planting densities in the rainy season. Intersubspecific combinations that gave diversity for both maturity and growth habit exhibited synergistic interactions most frequently. However, this intergenotypic interaction was specific to the genotypes involved. Investigation of cultivar mixtures in groundnuts should focus on stability rather than maximization of yield since no mixture yield surpassed that of the highest-yielding variety.
 
Publisher Elsevier
 
Date 1988
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/3740/1/JA_723.pdf
Rattunde, H F and Ramraj, V M and Williams, J H and Gibbons, R W (1988) Cultivar mixtures: a means of exploiting morpho-developmental differences among cultivated groundnuts. Field Crops Research, 19 (3). pp. 201-210. ISSN 0378-4290