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Frequency of Natural Out‐Crossing in Partially Cleistogamous Pigeonpea Lines in Diverse Environments
Author(s) -
Saxena K. B.,
Jayasekera S. J. B. A.,
Ariyaratne H. P.,
Ariyanayagam R. P.,
Fonseka H. H. D.
Publication year - 1994
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/cropsci1994.0011183x003400030011x
Subject(s) - biology , outcrossing , cajanus , mutant , sri lanka , botany , horticulture , agronomy , pollen , genetics , gene , history , ethnology , south asia
Natural out‐crossing is the major cause of loss of varietal purity in pegeonpea [ Cajanus cajan (L.) Millsp.]. The frequency of natural out‐crossing of partially cleistogamous mutant lines, characterized by a modified keel and filamentous anthers, was studied at two locations in Sri Lanka and three locations in India. Indeterminate growth habit and normal floral morphology were used as dominant markers and the frequency of anural out‐crossing was estimated as percentage of the observed hybrid plants. Natural out‐crossing in the mutant lines in Sri Lanka ranged from 0.14 to 1.33% in comparison to 6.34 to 19.64% in the controls. In the Indian environments, natural outcrossing ranged from 0.16 to 2.67%. The mutant was higly stable over diverse environments, and may be of considerable economic importance in pigeonpea improvement and seed‐production programs.