Yield component analysis of bunch groundnut (Arachis hypogaea L. ssp. fastigiata) germplasm in Sri Lanka
1993
Pathirana, R. (Ruhuna Univ., Kamburupitiya (Sri Lanka). Dept. of Agronomy)
One hundred and twenty-five bunch groundnut (Arachis hypogaea L. ssp. fastigiata) accessions, selected from over 300 entries for adaptability, were studied for yield and related quantitative characters during two consecutive dry seasons under irrigation in the Intermediate Zone of Sri Lanka. The accessions showed much diversity for the characters. Low environmental variability was recorded for seed size and shelling percentage. The number of pods, number of seeds, and the pod weight/plant had similar levels of variability and high correlations among themselves and with seed yield. Genotypic correlations and the direct effect (estimated by the method of path coefficients) of the number of pods/plant and the seed size on the seed yield were high. The number of seed/pod also correlated positively with yield but to a lesser extent than the other yield components. Positive direct effects and lack of negative indirect effects of yield components on the seed yield indicated the possibility of improving seed yield and seed size without compensatory effects in irrigated groundnut.
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