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Books > Science & Mathematics > Biology, life sciences > Botany & plant sciences > Plant physiology
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Current Options for Cereal Improvement - Doubled Haploids, Mutants and Heterosis Proceedings of the First FAO/IAEA Research Co-ordination Meeting on "Use of Induced Mutations in Connection with Haploids and Heterosis in Cereals", 8-12 December 1986, Guelph, Canada (Paperback, 1989 ed.)
Loot Price: R1,577
Discovery Miles 15 770
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Current Options for Cereal Improvement - Doubled Haploids, Mutants and Heterosis Proceedings of the First FAO/IAEA Research Co-ordination Meeting on "Use of Induced Mutations in Connection with Haploids and Heterosis in Cereals", 8-12 December 1986, Guelph, Canada (Paperback, 1989 ed.)
Series: Advances in Agricultural Biotechnology, 24
Expected to ship within 10 - 15 working days
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China was the first country to use cytoplasmic male sterility to
develop hybrid rice for commercial use in 1973. In 1986 more than 8
million hectares of hybrid rice were planted in China, which is one
fourth of the total rice area and produces one third of the total
rice in the country. Hybrids usually out yield the leading
commercial varieties by -20-30%, giving an average yield advantage
of 1 to 1. 5 t/ha, because of their better morphological traits,
higher physiological efficiency, better resistance to major
diseases and insects, and wide adaptability to various
agro-ecological stresses. IMPROVEMENT OF HYBRID RICE A. Mutation
techniques Almost all of the cultivated F1 rice hybrids in China
are developed from cytoplasmic male sterile and restorer lines.
According to surveys made in recent years, more than 30 sources of
cytoplasmic male sterility in rice can be identified, among which
only six are being commercially used (Table 1). Wild rice with
aborted pollen (WA) cytosterility system is the most popular one in
use to develop male sterile lines (MS line) in China. The main
technique available for developing stable MS lines is sUbstitution
backcrossing of the genome of one species into alien cytoplasm of
another. Sufficient backcrosses are required to eliminate all
nuclear genes derived from the cytoplasm donor species. A number of
studies have shown that using interspecies crosses, such as the
cross of wild rice (Q. perennis, Q. sativa, f.
General
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