Pollen fertility restoration in the CMS-Pampa × restorer crosses of rye

Irena Kolasińska

i.kolasinska@ihar.edu.pl
Zakład Genetyki i Hodowli Roślin, Instytut Hodowli i Aklimatyzacji Roślin, Radzików (Poland)

Abstract

Pollen fertility restoration of single crosses between male sterile lines (P lines) and restorers (R) was studied in the Plant Breeding and Acclimatization Institute at Radzików. In 1999 pollen fertility of 63 single crosses (21 P lines × 3 R lines) was evaluated in greenhouse and in field. In 2000 pollen fertility of 50 single crosses (10 P lines × 5 R lines) was estimated in the field. The experiments were laid out as a completely randomized block design with 3 replicates and 10 plants per plot. The degree of male sterility/fertility was assessed by visual anther score of single plants (ASP) on a 1–9 scale, restorer indices (RI-1, RI-2) and visual pollen shedding score of plots (PSSP) on a 1–9 scale. "AGRO" computer software was used for statistic analysis. Coefficients of correlation between fertility traits were computed. The analysis of variance showed that the degree of male fertility of single crosses strongly depends on a restorer genotype, a P line genotype as well as on the P  R interaction. The restorer and P line genotypes were a major source of variation. A wide range of variation for restorer index was observed among single crosses in the greenhouse and as well as in the field. Restoration index (RI-1) ranged from 0 to 100%. Mean restorer index for P lines ranged from 7,1 to 96,8% in the greenhouse and from 1,5 to 99,4 % in the field. Data presented in this paper clearly indicates, that choice of female components is very important for rye hybrid breeding. The P lines, in which male fertility could be easily restored, should be used for creation of hybrid varieties. P lines with the fertility hard to restore should be used as testers in a restorer breeding. All the restorers tested, provide a sufficient restoration of male fertility of the single crosses with majority of the P lines. The new restorer 330 R led to significantly higher male fertility levels than the other currently used lines. A high, significant correlation was found between all fertility traits estimated in the greenhouse and in the field. So, the simplest method, pollen shedding score of plots, could be successfully used in a breeding programme.


Keywords:

hybrid breeding, male sterility, restoration of pollen fertility, winter rye

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Published
2001-09-28

Cited by

Kolasińska, I. (2001) “Pollen fertility restoration in the CMS-Pampa × restorer crosses of rye”, Bulletin of Plant Breeding and Acclimatization Institute, (218/219), pp. 341–349. doi: 10.37317/biul-2001-0069.

Authors

Irena Kolasińska 
i.kolasinska@ihar.edu.pl
Zakład Genetyki i Hodowli Roślin, Instytut Hodowli i Aklimatyzacji Roślin, Radzików Poland

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