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1

Determining the plasmotypic structure of rye populations by SCAR markers

100%
Stojalowski S., Kociuba M., Stochmal B., Kondziola M., Jaciubek M.
Journal of Applied Genetics
|
2008
|
vol. 49
|
issue 3
229-232
EN
In rye (Secale cereale L.), 2 types of cytoplasmic male sterility are known: Pampa type (CMS-P) and Vavilovii type (CMS-V). As an alternative method to the conventional plasmotype-genotype interaction test, for identification of the cytoplasm type, the use of sequence-characterised amplified region (SCAR) markers was validated in this study. In over 2600 individual rye plants, representing 26 populations originating from Poland (18 cultivars), Iran (5 populations of primitive rye), and South America (3 populations), the cytoplasm type was determined by using a set of 3 SCAR markers. For about 10% of these individuals, the plasmotype-genotype interaction test was performed in parallel. The results of both tests were fully consistent. In the majority of the Polish populations, CMS-V was present, and only 4 populations contained CMS-P. Primitive Iranian populations contained predominantly normal cytoplasm, and only occasionally CMS-P was identified in them. South American populations displayed a mixture of normal cytoplasm, CMS-P and CMS-V. This work validates the use of SCAR markers as a reliable and quick method to determine the plasmotypic diversity of rye populations on a large scale.
2

Some morphological and phenological traits and fertility of lines of artificial winter oilseed rape originated from male-sterile plants (Barssica napus var.olifera L.)

100%
Wojciechowski A.
Genetica Polonica
|
1993
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vol. 34
|
issue 4
317-325
3

Rye SCAR markers for male fertility restoration in the P cytoplasm are also applicable to marker-assisted selection in the C cytoplasm

100%
Stojalowski S., Jaciubek M., Masojc P.
Journal of Applied Genetics
|
2005
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vol. 46
|
issue 4
371-373
EN
The study aimed at testing the usefulness of recently developed SCAR markers on rye (Secale cereale L.) chromosome 4R in hybrid breeding based on the C source of male sterility-inducing cytoplasm. Of 10 markers studied, 4 revealed polymorphisms between 2 inbred lines (544cms-C and Ot0-20) crossed to develop F2 and BC1 mapping populations. Analyses performed on 94 F2 and 93 BC1 plants allowed to extend a formerly constructed genetic map of chromosome arm 4RL. Three SCAR markers (SCP14M55, SCP15M55 and SCP16M58) were mapped in the vicinity of gene Rfc1, which restores male fertility in the C cytoplasm. The 3 tested SCAR markers proved to be effective in marker-assisted selection (MAS) for male fertility/sterility.
4

Male sterility and twin embryos in synthetic Brassica napus L.(B.campestris ssp.pekinesis cv. Granaat x B.oleracea ssp.acephala cv.Normal)

100%
Kalas-Janowska M.
Genetica Polonica
|
1993
|
vol. 34
|
issue 4
305-316
5

Development of new cytoplasmic-genetic male-sterile lines in pigeonpea from crosses between Cajanus cajan (L.) Millsp.and C. scarabaeoides (L.) Thouars

75%
Kalaimagal T., Muthaiah A., Rajarathinam S., Malini S., Nadarajan N., Pechiammal I.
Journal of Applied Genetics
|
2008
|
vol. 49
|
issue 3
221-227
EN
Exploitation of hybrid vigour is quite possible in cross-pollinated crops. However, pigeonpea is a grain legume crop with a moderate level of cross-pollination (20?70%), which is mainly aided by insect pollinators. As a first step, hybrids based on genetic male sterility (GMS) were developed in pigeonpea, but the hybrid seed production technique is not farmer-friendly, because in the hybrid seed production plot 50% of the population, which are male-fertile in the female rows, have to be eliminated in time before contamination. This requires skilled labour and is a time-consuming process, which increases the cost of hybrid seed production. Therefore, the objective of this study was to develop cytoplasmic-genetic male-sterile (CGMS) lines in pigeonpea through wide hybridization, which would be very suitable for hybrid seed production. Two CGMS lines, viz. CORG 990052 A and CORG 990047, were developed by interspecific hybridization of Cajanus cajan and C. scarabaeoides. Restorers were identified and three CGMS-based pigeonpea hybrids were developed. The hybrid COPH 3 is found to be promising in Tamil Nadu State, India.
6

Cytological investigations of the interspecific hybrids of Nicotiana tabacum L. ? N. glauca Grah.

75%
Trojak-Goluch A., Berbec A.
Journal of Applied Genetics
|
2003
|
vol. 44
|
issue 1
45-54
EN
Interspecific amphihaploid and amphidiploid hybrids between Nicotiana glauca Grah. (2n = 24) and N. tabacum L. (2n = 48) cultivars BY 103 and K 326 were analysed. F1 amphihaploids (2n = 36) were viable and completely self- and cross-sterile, and mostly univalents were present during meiosis (with pairing range from 0 to 5). In some meiocytes, meiotic irregularities were observed, such as sporadic chromatin bridges and formation of restitution nuclei. The resultant F1 hybrids were easily converted to amphidiploids (2n = 72) via colchicine treatment of seedlings. The number of univalents and the frequency of PMCs containing unpaired chromosomes indicated that amphidiploids N. tabacum cv. BY 103 or K 326 ? N. glauca represented quite a high pairing category. However, they were male sterile because pollen mother cells were arrested at the tetrad stage. The termination of development of PMCs, and consequently male sterility, are very rare in this kind of tobacco hybrids.
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