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- W2029558880 abstract "Few plant-breeding studies have examined methodology for improving common bean (Phaseolus vulgaris L.) yields by selecting in an intercrop situation. We hypothesized that early-generation testing would be as useful in a maize (Zea mays L.)/bean intercrop as in sole crop for identifying superior bean populations for yield. F 2 to F 5 bulks of six selected crosses and their F 5 -derived advanced lines were evaluated in sole crop or intercrop. The F 2 and F 5 bulks were evaluated together in a preliminary trial in one location, while the advanced lines were evaluated with the F 3 s in one location, and with the F 4 s in two locations. Within sole crop, selection of the best three populations, based on F 2 performance, provided 67% of the top advanced lines. The rank correlation between average bulk yield across generations and the average line yield was positive and significant. Within intercrop, selection of the best three populations provided 56% of the top advanced lines. The rank correlation between advanced line yield and bulk yield across generations was positive but not significant. Also, the top three F 2 populations selected in sole crop produced 89% of the top advanced lines in intercrop. Advanced line performance showed a positive significant correlation with mean F 4 bulk performance for grain yield, 100-seed weight and seeds per pod within sole crop, while positive significant correlation was seen with pods per plant and seeds per pod in intercrop. Results indicate that F 2 bulk yields can be used to discard the least promising crosses in both cropping systems. Key words: Early generation testing, Phaseolus vulgaris, intercropping" @default.
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- W2029558880 date "1998-10-01" @default.
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- W2029558880 title "Early generation testing of common bean (Phaseolus vulgaris L.) populations in sole crop and in maize/bean intercrop" @default.
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- W2029558880 doi "https://doi.org/10.4141/p97-041" @default.
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