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Antibiosis Resistance of QTL Introgressive Soybean Lines to Common Cutworm (Spodoptera litura Fabricius)

National Agricultural Research Center for Kyushu Okinawa Region, 2421 Suya, Koushi, Kumamoto 861-1192, Japan

View larger version (20K): [in this window] [in a new window]   Figure 1. Development of near-isogenic lines (NILs) with quantitative trait loci (QTLs) for antibiosis resistance; ‘Fuku’ indicates recurrent parent, ‘Fukuyutaka’. Boxed materials were evaluated the antibiosis resistance to common cutworm in this study. NIL-C1+C2 is homozygous for the resistant Himeshirazu allele at CCW-1 and CCW-2 loci. NIL-C1 is homozygous for the Himeshirazu allele at CCW-1. NIL-C2 is homozygous for the Himeshirazu allele at CCW-2. NIL-PI is homozygous for the PI 229358 allele at insect resistance QTL on linkage group M. Fuku/NIL-C1 and Fuku/NIL-PI are F1 hybrids of Fukuyutaka and NIL-C1 or NIL-PI. NIL-C1/NIL-PI is the F1 of NIL-C1 and NIL-PI.

View larger version (29K): [in this window] [in a new window]   Figure 2. Graphical genotypes of linkage group M and standardized insect-growth index (SII) of near isogenic lines (NILs). ‘Fuku’ indicates recurrent parent, ‘Fukuyutaka’. The dark gray and light gray bars indicate regions from ‘Himeshirazu’ and ‘PI 229358’, respectively. The white bars indicate Fukuyutaka. The positional relationships of simple sequence repeat (SSR) markers are based on the linkage map of Komatsu et al. (2005) for Himeshirazu-derived NILs and on that of Cregan et al. (1999) for PI 229358–derived NILs. Within a column, SIIs followed by different letters are significantly different as determined by the Tukey–Kramer multiple comparison test (P < 0.05).