VARIABILITY AND GENETIC PARAMETERS IN YIELD AND ITS ATTRIBUTES AMONG SOME GROUNDNUT (Arachis hypogaea L.) LINES

ABSTRACT
 Nine peanut lines and a commercial groundnut cultivar (Giza6) were evaluated in a randomized complete block design with three replications at the Experiment Station of the Agricultural Research Center (ARC), Ismailia during 2018 and 2019 seasons to study variability, heritability and genetic advance under selection. Results indicated that line 6 had the highest pod yield pl^-1, seed yield pl^-1, pod yield fad^-1, 100 pod weight and seedling dry weight. Line11 was the highest significantly in No. of pods pl^-1, No. of seed pl^-1,100 seed weight, pod length, seed length, radical length and seedling vigor index. Germination% ranged from 86.8 for line 9 to 93.9 for line 12. Line 15 recorded the highest value of shoot length. The crude oil varied from 46.1 to 48.1%. The line 12 had the greatest crude oil value. The crude protein ranged between 28.0 for line 9 to 31.5 for line 11 with a general mean of 30.2. The genotypic variance was greater than that of environmental variance for all studied traits. Moderate heritability coupled with high genetic advance was obtained for plant height, number of pods pl^-1 and number of seeds pl^-1, and pod yield fad^-1. Broad sense heritability was moderate for radical length, seedling vigor index, stander germination %, crude protein (%) and crude oil (%). Meanwhile, shoot length, seedling dry weight and total carbohydrates (%) had lower magnitude of heritability.