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The physiological basis of variation in yield in some sweet potato lines [electronic resource]

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Omran, A. F

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Language: English Summary language: Arabic Description: p.657-674Other title:

دراسة الأسس الفسيولوجية والكيماوية لاختلاف المحصول فى بعض سلالات البطاطا [Added title page title]

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Minufiya journal of agricultural research, 2002 v. 27 (3) [electronic resource]

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In: Minufiya Journal of Agricultural Research 2002. v.27(3)Summary: The physiological basis of variation in yield were studied among some sweet potato genotypes differ in foliage vigour and yield. The clonal lines used in this study were No. 9, 10, 19, 35, 106, 130, 131 and cultivar Mabrouka. This investigation was carried out at the Experimental Farm of Hort. Res. Station in El- Kanater El-Khayriya during two successive summer seasons, i.e. 1996 and 1997. Plant samples taken at 120 and 135 days after transplanting showed that stem dry weight at early stage presented the high portion of total plant dry weight. Also, genotypes which gave low tuber root weight at this stage showed relatively higher weights of other vegetative organs. With few exceptions leaf area, leaf area index were not correlated with tuber root yield. Significant differences were found between genotypes in some growth attributes such as relative growth rate (RGR), leaf area ratio (LAR), net assimilation rate (NAR) and crop growth rate (CGR). The results showed generally, that tuber root yield was positively correlated with RGR and NAR and negatively with LAR. However, CGR was significantly and positively correlated with tuber yield.

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The physiological basis of variation in yield were studied among some sweet potato genotypes differ in foliage vigour and yield. The clonal lines used in this study were No. 9, 10, 19, 35, 106, 130, 131 and cultivar Mabrouka. This investigation was carried out at the Experimental Farm of Hort. Res. Station in El- Kanater El-Khayriya during two successive summer seasons, i.e. 1996 and 1997. Plant samples taken at 120 and 135 days after transplanting showed that stem dry weight at early stage presented the high portion of total plant dry weight. Also, genotypes which gave low tuber root weight at this stage showed relatively higher weights of other vegetative organs. With few exceptions leaf area, leaf area index were not correlated with tuber root yield. Significant differences were found between genotypes in some growth attributes such as relative growth rate (RGR), leaf area ratio (LAR), net assimilation rate (NAR) and crop growth rate (CGR). The results showed generally, that tuber root yield was positively correlated with RGR and NAR and negatively with LAR. However, CGR was significantly and positively correlated with tuber yield.

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