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Heritability estimates for winter hardiness in lentil under natural and controlled conditions
Author(s) -
Ali A.,
Johnson D. L.
Publication year - 2000
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1046/j.1439-0523.2000.00491.x
Subject(s) - heritability , biology , transgressive , transgressive segregation , hardiness (plants) , offspring , demography , quantitative trait locus , botany , cultivar , genetics , gene , sedimentary depositional environment , pregnancy , paleontology , structural basin , sociology
Heritability analysis for cold tolerance in lentil was conducted using parental, F 2 and F 3 populations at two locations in Balochistan, Pakistan and one controlled environment in Fort Collins, Colorado, USA. Populations of parental and F 2 families were grown over 2 years (1991‐92 and 1992‐93) at Quetta, Balochistan, Pakistan. In 1992‐93, parental and F 3 families were studied at Quetta, and Kalat, Balochistan, Pakistan. Evaluation for normality using non‐transformed and log‐transformed data failed. Attempts to use analysis of variance were then abandoned in favour of parent‐offspring regression for narrow‐sense heritability. Estimates of narrow‐sense heritability ranged from 0.31±0.06 to 0.71 ± 0.06 under field conditions. Under controlled conditions, the estimated heritability was maximized at 1.00 ± 0.17 using 6‐ to 8‐week‐old lentils. Significant transgressive segregants were found in five of the six populations in the F 3 generation. Transgressive segregants appeared in the controlled F 3 generation but were not observed in field environments. This indicates that cold tolerance is under additive gene control and is environmentally sensitive in gene expression.