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Selection of wheat lines for yield and leaf rust resistance [electronic resource].

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Abdel-Sattar, A. A

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Language: English Summary language: Arabic Description: P. 121-138Other title:

إنتخاب سلالات قمح للمحصول ومقاومة لصدأ الأوراق [Added title page title]

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Egyptian journal of plant breeding, 2005 v. 9 (2) [electronic resource].

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In: Egyptian Journal of Plant Breeding 2005.v.9(2)Summary: The present study was conducted at the Agricultural Experimental Station of the National Research Centre, at Shalakan, Kalubia Governorate in 2000/2001 and 2001/2002 seasons to evaluate fifteen wheat breeding lines at F4 and F5 generations for yield and leaf rust resistance under field and greenhouse conditions. The cultivar Giza 160 was included as a check. Results showed significant differences among lines in all studied trait$ in both F4 and F5 generations except 1000-grain weight at F5 generation. Heritability estimates were high for all traits under field and greenhouse conditions. Grain yield/plant was positively correlated with other studied traits at both genotypic and phenotypic level the two generations under field conditions. A desirable negative correlation was found between both of incubation period on adult and latent period on adult with AUDPC, rust severity and No. ofpustules/cm2 on adult. Path-coefficient analysis revealed that 1000-grain weight, number of grains/spike and grain yield/spike followed by their joint effect were the highest contributors to variation in yield directly or indirectly. Three lines were considered as promising lines because of high yield and leaf rust resistance under field and greenhouse conditions.

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The present study was conducted at the Agricultural Experimental Station of the National Research Centre, at Shalakan, Kalubia Governorate in 2000/2001 and 2001/2002 seasons to evaluate fifteen wheat breeding lines at F4 and F5 generations for yield and leaf rust resistance under field and greenhouse conditions. The cultivar Giza 160 was included as a check. Results showed significant differences among lines in all studied trait$ in both F4 and F5 generations except 1000-grain weight at F5 generation. Heritability estimates were high for all traits under field and greenhouse conditions. Grain yield/plant was positively correlated with other studied traits at both genotypic and phenotypic level the two generations under field conditions. A desirable negative correlation was found between both of incubation period on adult and latent period on adult with AUDPC, rust severity and No. ofpustules/cm2 on adult. Path-coefficient analysis revealed that 1000-grain weight, number of grains/spike and grain yield/spike followed by their joint effect were the highest contributors to variation in yield directly or indirectly. Three lines were considered as promising lines because of high yield and leaf rust resistance under field and greenhouse conditions.

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