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Heterosis and Combining Ability in a Diallel Cross Peas 1
Author(s) -
Gritton E. T.
Publication year - 1975
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1975.0011183x001500040002x
Subject(s) - diallel cross , heterosis , biology , inbreeding depression , pisum , sativum , point of delivery , horticulture , cultivar , yield (engineering) , bloom , inbreeding , agronomy , hybrid , population , ecology , materials science , demography , sociology , metallurgy
Eight cultivars of peas ( Pisum sativum L.) were crossed in diallel, and the parents, F l 's, and F 2 's, evaluated for 2 years at two locations in Wisconsin. All traits studied except days to bloom showed heterosis and inbreeding depression. Yield heterosis of F l 's based on the midparent averaged 55%, and on the high parent 28%, over locations and years. Both general and specific combining ability were important for days to bloom, plant height, pods/plant, peas/pod, peas/plant, weight/seed, and seed yield. Pods/plant showed some maternal influence, which in turn led to maternal or reciprocal effects for seeds/plant and yield. Days to bloom showed a significant maternal influence in one experiment.