Breeding lines with improved performance under P and water limitation. Parental crosses for low P in acid soil identified

Abstract

Objective and intended output: Root attributes contribute to acquisition of immobile nutrients such as P. Genotypic variation in root crown in response to P availability in soil has been observed before. The main objective of this work is to quantify phenotypic variation in shoot and root crown attributes among a 16 ALB common bean germplasm. Exploring phenotypic variation in root and shoot attributes could result in identification genotypes with greater ability to acquire P from acid soil with low available phosphorus (P) or high exchangeable aluminum (Al).

Materials and methods: A group of 16 common bean genotypes were evaluated for phenotypic variation for root and shoot attributes, under field conditions in an acid soil from Quilichao, Colombia. Two experiments were planted on April 2016. The 16 genotypes included one andean ( ICA Quimbaya) and mesoamerican (VAX 1 ) checks, 8 ALB lines (ALB 91, 213, 348, 350, 351, 352) as well as 6 breed lines {T3= SMN 57 X (SMN 24xALB 191)F1/-020F1-06P-MQ-8C-MC-MC-MQ; T4= SMN 57 X (SMN 24xALB 191)F1/-037F1-03P-MQ-8C-MC-MC-MQ ; T5= SMN 57 X (SMN 41xSXB 412)F1/-059F1-10P-MQ-3C-MC-MC-MQ; T6 (SMN 57 X (ALB 191xSMC 41)F1/-014F1-03P-MQ-2C-MC-MC-MQ); and T12= (ALB 213xALB 121/-MQ-25Q-MQ-MQ-MQ-MC-01C-MC-MQ)}.