Adaptability and phenotypic stability for the yield in green pod of 20 lines of voluble peas (Pisum sativum L.) with afila gene

Abstract

In Nariño, the climbing pea varieties, due to their high production capacity, are unable to stand upright despite the use of trellising systems, resulting in lodging and losses in yield and product quality. A viable option to mitigate the problem is the use of climbing genotypes with the afila gene that replaces leaves with tendrils, favoring the grip of the plants on the strings that serve as tutors. In search of a solution to this problem, the adaptability and phenotypic stability for green pod yield of 20 climbing pea lines with the afila gene and the normal-leaf controls Obonuco Andina and Sindamanoy were evaluated in five municipalities in the southern part of the department of Nariño. A randomized complete block design with four replications was used at each location. The data obtained were analyzed using the Eberhart and Russell and AMMI models. In the Eberhart and Russell model, the most favorable environments were Puerres and Gualmatán and the most unfavorable environment was Potosí. Lines GR15, GR10 and the Sindamanoy variety were selected as high yielding, adaptable and predictable. The analysis of variance for the AMMI model indicated a high environmental effect, resulting from contrasting environments and low diversity between the lines with the afila gene evaluated. The selection index (GSIi) obtained from the stability value (ASV) and the classification by yield, allowed the identification and selection in order of merit of the genotypes Obonuco Andina, GR15, GR14, GR28, GR10, GR2, GR23, Sindamanoy and GR3 as those with the highest stability and yield. The coincidence in selection between the Eberhart and Russell and AMMI models was 33,3%.