An attempt at application of the rye Pampa cytoplasm in hybrid breeding of triticale
Bogusław Łapiński
b.lapinski@ihar.edu.plKrajowe Centrum Roślinnych Zasobów Genowych, Instytut Hodowli i Aklimatyzacji Roślin, Radzików (Poland)
Abstract
Crosses between diploid rye with male-sterilizing Pampa cytoplasm and winter triticale were performed in the years 2000 and 2001. Both tetraploids and hexaploids of triticale proved to be successful as male parents in production of the F1 hybrids. Back-crossing of the hybrids caused transfer of the Pampa cytoplasm into tetraploid and hexaploid triticale. In 2002, female fertility of the plant material was high enough to start selection of male sterile lines as well as of those with restored male fertility. The results for pollen shed from the year 2004 showed a full range of variation, from complete sterility to full fertility. The sterilizing effect of the Pampa cytoplasm was stronger in tetra- than in hexaploid triticale. Among the tetraploids, eight of 14 lines brought full sterility to all investigated B1F1 generation hybrids. Among the hexaploids, only two of 20 lines caused a similar effect. However, selection progress in fertility restoration was only observed in the tetraploids. An increase in vegetative vigour in Pampa-cytoplasmic F1 was only found in the tetraploid group. Among the hexaploids, the vigour was distinctly diminished in the majority of genotypes, compared to the male parents and F1 with another rye cytoplasm.
Keywords:
CMS, hexaploid triticale, hybrid breeding, Pampa cytoplasm, tetraploid triticaleReferences
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Authors
Bogusław Łapińskib.lapinski@ihar.edu.pl
Krajowe Centrum Roślinnych Zasobów Genowych, Instytut Hodowli i Aklimatyzacji Roślin, Radzików Poland
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