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Male sterility and pollen fertility restoration in triticale (x Triticosecale Wittmack)
Abstract:
The aim of this study, performed in the years of 2002-20012, was to derive male sterile lines in winter triticale. The study confirmed previous findings, that a very limited genetic pool for maintenance of male sterility in CMS-Triticum timopheevi is available in genotypes of triticale. Among 1250 tested pollen parents, only 86 (6.9%) acted as complete maintainers, while 334 (26.7%) maintained male sterility partially. On the basis of male sterile plants selected out of complete and segregating progeny, 463 completely male sterile BC2 lines and sub-lines were produced. 830, (66.4%), pollen parents restored completely or partially pollen fertility of F1 hybrids.
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01:59Plant Breeding and Biotechnology
02:27Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
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