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Phenotypic stability in peanut (Arachis hypogaea L.) [electronic resource].

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Al-Kaddoussi, A. R

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Language: English Summary language: Arabic Description: p.1295 -1309Other title:

الثبات المظهري في الفول السوداني [Added title page title]

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Zagazig journal of agricultural research, 2003 v. 30 (4) [electronic resource].

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In: Zagazig Journal of Agricultural Research 2003.v.30(4)Summary: Twenty five genotypes of groundnut that are of local origin were collected from various location in Ismailia and Sharkia governorate were evaluated in· demonstrative field in Wadi EIMolaak village, Abu Hammad district, Sharkia Governorate using randomized - complete block design in three replicates during three summer growing seasons 1999, 2000 and 2001 respectively, using two sowing dates (early and late). The mean performance and stability parameters ( phenotypic) for No. of pods/plant, No. of ,seeds/pod, 100- seed weight and seed yield ardab/fad. were computed using Eberhart and Russell (1966) formulae. The results revealed highly significant genotype x environment interaction for all studied characters. The variance due to environments (linear) were significantly ditTerent for aU studied characters . The obtained results showed that the ditTerent genotypes responded differentially to the changing environments (sowing dates). The "b" value was either more or less than unity in all cases, except genotype 11 (No. of pods/plant and seed yield/plant). genotype No.25 (No. of seeds/pod and seed yield ardab/fad). Genotype 1 and 19 for 100- seed weight and seed yield ardab/fad. respectively, where the value "b" approached near unity and indicated average response of the fluctuating environmental conditions (stable) prevailed during the different sowing dates.

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Twenty five genotypes of groundnut that are of local origin were collected from various location in Ismailia and Sharkia governorate were evaluated in· demonstrative field in Wadi EIMolaak village, Abu Hammad district, Sharkia Governorate using randomized - complete block design in three replicates during three summer growing seasons 1999, 2000 and 2001 respectively, using two sowing dates (early and late). The mean performance and stability parameters ( phenotypic) for No. of pods/plant, No. of ,seeds/pod, 100- seed weight and seed yield ardab/fad. were computed using Eberhart and Russell (1966) formulae. The results revealed highly significant genotype x environment interaction for all studied characters. The variance due to environments (linear) were significantly ditTerent for aU studied characters . The obtained results showed that the ditTerent genotypes responded differentially to the changing environments (sowing dates). The "b" value was either more or less than unity in all cases, except genotype 11 (No. of pods/plant and seed yield/plant). genotype No.25 (No. of seeds/pod and seed yield ardab/fad). Genotype 1 and 19 for 100- seed weight and seed yield ardab/fad. respectively, where the value "b" approached near unity and indicated average response of the fluctuating environmental conditions (stable) prevailed during the different sowing dates.

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