Study on the relationship between yield and yield components of peanut [Arachis hypogaea]
1984
Supawadee Tangteerawattana
Trait association and path analysis of 2 sets of peanut breeding lines were studied. Each set consisted of 14 different breeding lines plus Tainan 9 and SK. 38 as common checks. In the first set, yield of the rainy season experiment was positively correlated with number of pods per plant and number of seeds per plant. Negative associations were observed between yield and days to 50 percent flowering, days to maturity and 100 seed weight. In the dry season experiment, a similar trend was found, although not statistically significant. The result of path coefficient analysis revealed that the number of pods per plant, the number of seeds per plant and length of primary branches had a positive direct effect on yield in the rainy season experiment whereas length of primary branches had greatest influence on yield in the dry season experiment that the number of seeds per plant was a major yield component. In the breeding lines of the second set, the observed correlations among traits of this experiment were similar to those in the rainy season experiment of the first set. The computer path coefficients indicated that the number of seeds per plant in the rainy season experiment had the most direct effect on yield, whereas the number of pods per plant was most important in the dry season experiment. The number of pods per plant and number of seeds per plant could be used in indirect selection for higher yield improvement
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