Summary
Seeds of 4 crosses of groundnut (Arachis hypogaea L.), ‘Robut 33-1’ x ‘Chico’, ‘Robut 33-1’ x ‘NC Ac 17090’, ‘Robut 33-1’ x ‘PI 298115’ and ‘MK 374’ x ‘GAUG 1’, were irradiated with 30 kR. In the F1, some branches of each plant were intermated with other plants at random and others selfed in each cross to produce S2 and F2 seeds. They were evaluated for pod yield, shelling percentage and 100-kernel weight. The frequency of plants superior to F[in1] was much higher in S2 than in F2, which was, in general, true for the values of yield and its components. The S2 and F2 were advanced to third generation by selfing. The families descending from S2 showed clear superiority over those from F2. The reason for such superiority was suggested to be the recombination of genes from the upper and lower ends of the genotypic distribution under intermating.
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Arunachalam V, Bandyopadhyay A, Nigam SN, Gibbons RW (1980) Heterotic potential of single crosses in groundnut (Arachis hypogaea L.). Oleagineux 37:415–420
Comstock RE, Robinson HF (1948) The components of genetic variance in populations of biparental progenies and their use in estimating the average degree of dominance. Biometrics 4:254–266
Hanson WD (1959) Breakup of initial linkage blocks under selected mating systems. Genetics 44:857–868
Langham DG (1961) The high-low method in crop improvement. Crop Sci 1:376–378
Miller PA, Rawlings JO (1967) Breakup of initial linkage blocks through intermating in a cotton breeding population. Crop Sci 7:199–204
Stam P (1977) Selection response under random mating and under selfing in the progeny of a cross of homozygous parents. Euphytica 26:169–184
Yonezawa K (1983) Selection strategy in breeding of self fertilizing crops. 5. Evaluation of intermating before selection under a fixed breeding cost. Jpn J Breed 33:423–438
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Communicated by B. R. Murty
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Dutta, M., Arunachalam, V., Bandyopadhyay, A. et al. Early generation intermating for yield improvement in groundnut (Arachis hypogaea L.). Theoret. Appl. Genetics 71, 662–666 (1986). https://doi.org/10.1007/BF00264273
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DOI: https://doi.org/10.1007/BF00264273