Abstract:
:Soybean partial-female-sterile mutant 1 (PS-1) was recovered from a gene-tagging study. The objectives were to study the inheritance, linkage, allelism, and certain aspects of the reproductive biology of the PS-1 mutant. For inheritance and linkage tests, PS-1 was crossed to flower color mutant Harosoy-w4 and to chlorophyll-deficient mutant CD-1, also recovered from the gene-tagging study. For allelism tests, reciprocal crosses were made with PS-1 and three other partial-sterile mutants (PS-2, PS-3, and PS-4) recovered from the same gene-tagging study. The PS-1 mutant is inherited in a 3:1 ratio and is a single recessive gene. Linkage results indicated that the gene for partial sterility in PS-1 is not linked either to the w4 locus or to the CD-1 locus. Allelism tests showed that the gene in PS-1 is nonallelic to the gene in PS-2, PS-3, and PS-4. Investigations of developing and mature pollen indicated no differences in morphology, stainability, or fluorescence between normal and partial-sterile genotypes. The PS-1 mutant is completely male fertile. Confocal scanning laser microscopy was used to determine that early embryo abortion in PS-1 is due indirectly to abnormal migration of the fused polar nucleus, which prevented it from being fertilized. Subsequent absence of endosperm development leads directly to abortion of the proembryo.
journal_name
Am J Botjournal_title
American journal of botanyauthors
Pereira T,Lersten N,Palmer Rsubject
Has Abstractpub_date
1997-06-01 00:00:00pages
781issue
6eissn
0002-9122issn
1537-2197pii
84/6/781journal_volume
84pub_type
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