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Evaluation of Stay-Green Sorghum Germplasm Lines at ICRISAT

International Crops Research Institute for the Semi Arid Tropics (ICRISAT), Patancheru 502324, Andhra Pradesh, India

View larger version (33K): [in a new window]   Fig. 1. Maximum and minimum temperatures, rainfall (vertical bars), and pan evaporation during the field evaluation of 72 stay-green sources during the post-rainy seasons of 1998-1999 (A) and 1999-2000 (B) at ICRISAT, Patancheru, India. The horizontal arrow indicates the range in flowering time in each year.

View larger version (22K): [in a new window]   Fig. 2. Field percentage green leaf area in relation to days from flowering for B 35 (stay -green) and SPV 783 (senescent) genotypes in 1998-1999 (A) and 1999-2000 (B). Equations were fitted to these points to estimate percentage green leaf area for various times after flowering.

View larger version (31K): [in a new window]   Fig. 3. Dendrogram of 72 stay-green sources, based on percentage green leaf area at 15, 30, and 45 d after flowering in both 1998-1999 and 1999-2000. Clustering was truncated at five clusters, which retained 74% of the initial variation in percent green leaf area. See Table 2 for pedigree information.

View larger version (26K): [in a new window]   Fig. 4. Mean percentage green leaf area at 15, 30, and 45 d after flowering of the five stay-green clusters in 1998-1999 (A) and 1999-2000 (B). See Table 2 for details of the cluster composition and cluster means.