In Vitro Haploid Production in Higher Plants, Volume 3: by S. Mohan Jain (ed.), S. K. Sopory (ed.), R. E. Veilleux

By S. Mohan Jain (ed.), S. K. Sopory (ed.), R. E. Veilleux (ed.)

Since the start of agricultural creation, there was a continual attempt to develop extra and higher caliber nutrients to feed ever expanding popula­ tions. either stronger cultural practices and superior crop crops have alIowed us to divert extra human assets to non-agricultural actions whereas nonetheless expanding agricultural creation. Malthusian inhabitants predictions proceed to alarm agricultural researchers, in particular plant breeders, to hunt new applied sciences that might proceed to permit us to provide extra and higher nutrients through fewer humans on much less land. either development of current cultivars and improvement of recent high-yielding cultivars are universal ambitions for breeders of alI plants. In vitro haploid creation is likely one of the new applied sciences that convey nice promise towards the target of accelerating crop yields through making related germplasm to be had for plenty of vegetation that used to be used to enforce one of many maximum plant breeding good fortune tales of this century, i. e. , the improvement of hybrid maize by means of crosses of inbred traces. one of many major functions of anther tradition has been to provide diploid homozygous natural traces in one iteration, hence saving many generations of backcrossing to arrive homozygosity via conventional capability or in vegetation the place self-pollination isn't attainable. simply because doubled haploids are corresponding to inbred strains, their price has been liked through plant breeders for many years. the hunt for common haploids and strategies to urge them has been ongoing because the starting of the 20 th century.

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83: 294-300. 2. ) HANS C. PEDERSEN and BIRGIT KEIMER Contents 1. Introduction 2. Haploid production by in vivo techniques 3. 1. 2. 1. 2. 3. 4. Embryo sac stage 17 18 20 20 20 20 21 23 24 4. 5. 6. 7. 8. 5. 6. 7. 8. lntroduction The cultivated beet is a biennial member of the Chenopodiaceae. It is bred for high yield of extractable sugar (sugar beet) or for high yield of roots with good feed value (fodderbeet). At the end of the first growing season, the thickened fteshy roots can be harvested and utilized.

2. ) HANS C. PEDERSEN and BIRGIT KEIMER Contents 1. Introduction 2. Haploid production by in vivo techniques 3. 1. 2. 1. 2. 3. 4. Embryo sac stage 17 18 20 20 20 20 21 23 24 4. 5. 6. 7. 8. 5. 6. 7. 8. lntroduction The cultivated beet is a biennial member of the Chenopodiaceae. It is bred for high yield of extractable sugar (sugar beet) or for high yield of roots with good feed value (fodderbeet). At the end of the first growing season, the thickened fteshy roots can be harvested and utilized. In the second year, after cold treatment (vernalization) in the field or in cold storage, the compressed stem will elongate into a 1-2 m tall inftorescense with numerous small petalless ftowers in an open panic1e.

Euphytica 63: 233-237. H. and M. Goska, 1982. Attempts to induce haploids in anther cultures of sugar, fodder and wild species of beet. Acta Soc. Bot. Poloniae 51(1): 91-105. S. S. Sangwan-Norreel, 1987. Ultrastructural cytology of plastids in pollen grains of certain androgenic and nonandrogenic plants. Protoplasma 138: 11-22. ,1983. Possibilities of detection and induction of haploids in Beta vulgaris L. Biologia (Bratislava) 38(11): 1113-1122. C. Pedersen and B. Keimer Siebel, J. P. Pauls, 1989.

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