About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in CS

  1. Vol. 19 No. 5, p. 628-630
     
    Received: Oct 13, 1978
    Published: Sept, 1979


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2135/cropsci1979.0011183X001900050020x

Analyses of a Dominant Male-Sterile Character in Upland Cotton. II. Genetic Studies1

  1. D. T. Bowman and
  2. J. B. Weaver2

Abstract

Abstract

A plant in an okra leaf, frego bract, nectariless strain of upland cotton (Gossypium hirsutum L.) had one branch bearing male-sterile flowers. Crosses between male-sterile and male-fertile plants resulted in populations segregating 1:1 for fertile and sterile plants. Populations from selfed F1 and F4 fertile plants contained only fertile plants. These data suggested that a dominant gene controlled the sterility expression. Viability tests disclosed that a few viable pollen grains were produced in male-sterile flowers. Six male-sterile plants produced self-pollinated seed; the resulting progenies gave a ratio of one sterile to one fertile plant, rather than 3:1 as expected. It was theorized that the pollen grains carrying the dominant gene for male sterility were less competitive than pollen grains carrying the recessive allele or non-viable. Testcross populations of sterile plants in the F2 generation segregated 1 fertile:1 sterile, indicating that no plant was homozygous dominant for male sterility. Cytological observations had revealed that the new dominant gene differed from Ms4 and Ms7, is microsporogenesis breakdown. The gene symbol Ms10 is proposed for this new dominant gene conditioning male sterility.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .