Abstract
Abstract Knowledge of genetic diversity is crucial to assess the variability of genotypes and their potential use in crop improvement program. The present experiment was conducted at Horticultur Research Station (HRS), Dailekh (1300 masl) for three years during 2016-2018 to study the agro-morphological variability and performance of six genotypes of French bean ( Phaseolus vulgaris L.) for pod and seed yield. The genotypes viz; Bhatte, Chaumase, Dhankute Chirrke, WP Con Bean, White OP and Trishuli were experimented in Randomized Completely Block (RCB) design with four replications. Observations were recorded on 14 qualitative and 12 quantitative traits. Among the qualitative traits, French bean genotypes observed variability w.r.t. stem pigmentation, leaf color, leaflet shape, stem hairyness, flower color, pod color, pod shape, pod cross section, pod beak position, pod appearance, seed size, seed shape and seed color. Analysis of variance for quantitative traits showed significant differences among all the genotypes for all the characters studied. Three year mean results showed the genotype Chaumase (35.0 t/ha) followed by Trishuli (28.0 t/ha), WP Con Bean (24.6 t/ha) and White OP (22.9 t/ha) recorded the maximum green pod yield. Similarly, genotypes Chaumase (2.1 t/ha), Trishuli (2.1 t/ha), Dhankute Chirrke (1.44 t/ha) and White OP (1.09 t/ha) were found promising for seed production purpose. The agro-morphological variation observed in growth and pod characters could be utilized in variety improvement programs. Future research work needed to be focused on the further evaluation of these genotypes under different production system for yield and seed production and to identify traits useful for crop improvement.
Highlights
French bean (Phaseolus vulgaris L.), the oldest domesticated plant species is a native crop of Central and South America (Swaider et al 1992)
Future research work needed to be focused on the further evaluation of these genotypes under different production system for yield and seed producion and to identify traits useful for crop improvement
Bhatte, Dhankute Chirrke, White OP and Trishuli had green pigmentation on stem, Chaumase had green with red streaks and WP Con Bean had green with purple stem pigmentation
Summary
French bean (Phaseolus vulgaris L.), the oldest domesticated plant species is a native crop of Central and South America (Swaider et al 1992). Apart from protein, French bean contains vitamins and minerals which can help to partial alleviation of the malnutrition problem. It is majorly cultivated for its tender pods as vegetable, dried seeds used as pulse and the foliage is used as fodder for animals (Pandey et al, 2012). In Nepal, it is cultivated in a wide range of agroclimatic conditions and different season from 300 m to 2,500 masl (Neupane et al 2008) Both pole and bush-type French beans are cultivated in the hilly region (500–1600 masl) for green pods during summer to autumn. The current research was initiated with the objectives of evaluation of pole type French bean genotypes for agro-morphological variability and their yield potential
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