Partition and Migration of Photosynthates in Newly Cultivated Grain Sorghum (Sorghum bicolor L.Moench) Grown under Sandy Soil in Egypt

Ahmed, M.A. and Magda, A.F.S. and El-Housini, E.A. (2013) Partition and Migration of Photosynthates in Newly Cultivated Grain Sorghum (Sorghum bicolor L.Moench) Grown under Sandy Soil in Egypt. Journal of Applied Sciences Research, 9 (2). pp. 1161-1169.

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Two field experiments were carried out in newly cultivated sandy soil at New Salheyia Region, Sharkia Governorate in summer seasons of 2011 and 2012 on ten grain sorghum cultivars to study partition and migration of photosynthates in grain sorghum. Results can be summarized as follows: 1 - Grain sorghum significantly differed in growth parameters at the different stages of growth, as well as, in yield and its components (except crop index). 2 - The ten grain cultivars differed significantly in photosynthates partitioning, where, significant differences were found in carbohydrate and protein percentages in vegetative organs and grains, oil percentage of grains as well as, in protein percentage in grains and straw yields. In addition, glucose required for synthesis of different chemical constituents of each vegetative organ, grains and straw, also, in carbon equivalent were significantly differed among the ten grain sorghum cultivar under investigation. Furthermore, cultivar differences in yield energy per plant or per fed for grains and straw yields, as well as, coefficient of energy of crop index and harvest index were significant, also in migration coefficient. 3 - Highly and significant and positive correlation was found between grain yield/plant and each of weight of panicle, grain wt./panicle, RPPgr, migration coefficient, crop index, harvest index, plant height, blades area/plant and LAI. On the contrary, the relationships between grain yield/plant and Rppveg and Rppbio were negative and significant in RPPveg only. 4 - Weight of panicle, migraine coefficient, grain wt./panicle and RPPgr could contribute much of grain yield for grain sorghum cultivars since R2 was 99.99% of the variation. 5 - Harvested grain sorghum yield can be increased by growing Giza-115, Shandwel-2, Shandwel-6, Hybrid-302, Hybrid-304. Hybrid-305 and Hybrid-306 where these cultivars characterized by their highest values from vegetative growth, yield and its components and photosynthates portioning and migration towards the economic yield compared with the other three cultivars under study Giza-13, Pioneer and Dorado

Item Type: Article
Author Affiliation: Department of Field Crops Research, National Research Centre, Dokki, Giza, Egypt
Subjects: Plant Protection
Soil Science and Microbiology
Divisions: Sorghum
Depositing User: Mr B Krishnamurthy
Date Deposited: 25 Jun 2013 14:13
Last Modified: 25 Jun 2013 14:13

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