Gamete Eliminator Adjacent to the wx Locus as Recealed by Pollen Analysis in Rice

1 July 1994

journal article
Published by Oxford University Press (OUP) in Journal of Heredity

Vol. 85 (4) , 310-312
https://doi.org/10.1093/oxfordjournals.jhered.a111465

Abstract

A previous study in rice revealed that Wx^a (nonwaxy endosperm) could not be transferred from PTB 10 to T65wx To clarify this phenomenon, the F₁, hybrid was backcrossed with T65 wx- Two semistenle BC₃F₁, plants were heterozygous for wx, but they produced only waxy seeds on selfing. Pollen analysis revealed that nonwaxy pollen grains were present at a frequency of 14.8 × 10⁻⁴, indicating that most Wx^a pollen grains were eliminated during gametogenesis The results showed that PTB 10 and T65wx carried S10a(t) and S10(t), respectively, and that S₁₀(t) induced abortion of gametes that carried the opposite allele, S₁₀(t), which was linked to Wx^a The estimated frequency of recombination between wxand S₁₀(t) suggests that the gamete eliminator detected is very close to the wx locus. Molecular analysis of the eliminator may thus be facilitated.

Keywords

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