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Inheritance of Protruded Stigma in Black Gram [ Vigna mungo (L.) Hepper]
Author(s) -
Kumar Shiv,
Gupta Sanjeev,
Datta Subhojit,
Singh Bansa,
Singh B. B.
Publication year - 2012
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/cropsci2011.01.0033
Subject(s) - biology , vigna , outcrossing , sterility , mutant , petal , pollen , population , botany , pollination , hybrid , genotype , stamen , genetics , horticulture , gene , demography , sociology
Inheritance of protruded stigma in black gram [ Vigna mungo (L.) Hepper] was investigated in the F 1 , F 2 , and F 3 generations of four crosses and their reciprocals involving a natural flower mutant with its parent genotype (IPU 99‐167) and three other genotypes (PLU 710, Type 9, and Barabanki local). The outcrossing in the mutant was due to a flower mutant with protruded stigma and crumpled petals, thus presenting a physical condition for functional male sterility. The mutant plants appeared in the parent population at an average frequency of 3.05%. The F 1 plants showed normal flowers with normal pod and seed set. The segregation analysis of F 2 and F 3 populations indicated a single recessive gene conditioning protruded stigma and crumpled petals with pleiotropic effect. The gene symbol stg1stg1 is proposed for this mutation. Under natural conditions in the crossing block, 100% of the seeds obtained from the mutant plants were the result of cross pollination despite 93.6% pollen viability. However, the number of seeds produced by the mutant was 92% less than normal plants. Although the mutant genotype provides a mechanism for outcrossing, unless the poor seed set can be improved (e.g., by delayed planting), its use in exploiting heterosis and population improvement will be limited.