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Photoperiod Responses of Extra-Short-Duration Pigeonpea Lines Developed at Different Latitudes

Y. S. Chauhan*,a, C. Johansena, Jung-Kyung Moonb, Yeong-Ho Leeb,c and Suk-Ha Leeb,c

a International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502324, Andhra Pradesh, India
b National Crop Experiment Station, Suwon 441-110, The Republic of Korea
c School of Plant Science, Seoul National Univ., Suwon 441-744, The Republic of Korea



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  		Fig. 1. Total dry matter accumulation, leaf number per plant and leaf area per leaf of MN 5 and ICPL 85012 under extended (E) and normal (N) day lengths, Alfisol, 1996 rainy season at ICRISAT-Patancheru. Suffix R with E and N represent reproductive structures. Vertical bars are standard errors of means for comparing total dry matter and reproductive structures of both lines under E or N.

 


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  		Fig. 2. Biplot of interaction principal component axis 1 against mean yield of five lines (ICPL 4, ICPL 84023, ICPL 85010, ICPL 85012, ICPL 88015) developed at Patancheru and three (MN 1, MN 5 and MN 8) developed in Minnesota, USA, in two natural day environments, ND95, ND96 (in 1995 and 1996) and two extended day environments, ED95 and ED96 (in 1995 and 1996). The dashed line separates negative and positive scores. Each environment is shown by a separate symbol.

 


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  		Fig. 3. Relationship between days to flowering and yield at Suwon, Korea, 1998.

 




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