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Allelopathy, genetic parameters and cluster analysis of some rice (Oryza sativa L.) genotypes [electronic resource].

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El-Malky, M. M

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Language: English Summary language: Arabic Description: p.139-149Other title:

الأليلوباثي، المكونات الوراثية وتحليل القرابة الوراثية لبعض التراكيب الوراثية من الارز [Added title page title]

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Alexandria journal of agricultural research, 2015 v. 60 (3) [electronic resource].

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In: Alexandria Journal of Agricultural Research 2015.v.60(3)Summary: The present investigation was conducted at Rice Research and Training Center (RRTC), Sakha, Kafr El-Sheikh, Egypt during 2012 and 2013 seasons to evaluate twenty-one rice genotypes for allelopathic activity. The selected genotypes were classified into three categories, eight entries as Japonica type, nine entries as Indica and four entries as Indica/Japonica type. The results showed that some rice genotypes showed allelopathic activity against Echinochloa crus- galli L. (barnyard grass) in the field after planting. These varieties showed biologically active suppression of E. crus-galli L. by 80-90 % in the field. These genotypes are important and suitable for direct seeded rice; also it could be utilized in breeding programs to transfer this trait to commercial varieties. For agronomic traits, the most of traits under study had a wide range of variability. This range was reflected differences among these genotypes. Four genotypes namely; Giza 177, Milyang 97, Giza 181 and Suweon 339 were very early. Five genotypes namely; Giza 178, Giza 177, Milyang 97, Giza 181 and lET 1444 scored high values for harvest index. Giza 177 and Giza 178 are cultivated in more than 500/o of the cultivated area with rice in Egypt. Clustering varieties, based on similarity of quantitative characteristics, produced two large groups. The first one included seven rice genotypes, i.e.; Giza 171, Giza 176, Suweon 339, IET 1444, IR 65598, Giza 178 and Giza 181. Key words: Rice (Oryza sativa L.), allelopatby, cluster analysis, genetic parameters.

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The present investigation was conducted at Rice Research and Training Center (RRTC), Sakha, Kafr El-Sheikh, Egypt during 2012 and 2013 seasons to evaluate twenty-one rice genotypes for allelopathic activity. The selected genotypes were classified into three categories, eight entries as Japonica type, nine entries as Indica and four entries as Indica/Japonica type. The results showed that some rice genotypes showed allelopathic activity against Echinochloa crus- galli L. (barnyard grass) in the field after planting. These varieties showed biologically active suppression of E. crus-galli L. by 80-90 % in the field. These genotypes are important and suitable for direct seeded rice; also it could be utilized in breeding programs to transfer this trait to commercial varieties. For agronomic traits, the most of traits under study had a wide range of variability. This range was reflected differences among these genotypes. Four genotypes namely; Giza 177, Milyang 97, Giza 181 and Suweon 339 were very early. Five genotypes namely; Giza 178, Giza 177, Milyang 97, Giza 181 and lET 1444 scored high values for harvest index. Giza 177 and Giza 178 are cultivated in more than 500/o of the cultivated area with rice in Egypt. Clustering varieties, based on similarity of quantitative characteristics, produced two large groups. The first one included seven rice genotypes, i.e.; Giza 171, Giza 176, Suweon 339, IET 1444, IR 65598, Giza 178 and Giza 181. Key words: Rice (Oryza sativa L.), allelopatby, cluster analysis, genetic parameters.

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