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Plant type improvement of indigenous rice cultivars through induced mutations

Abstract

A high yielding, locally adapted cultivar `Afaa Mwanza 1/159` of rice (Oryza sativa L.) which is tall and late in maturity, was irradiated with gamma rays at doses of 170, 210 and 250 Gy to shorten plant height and time of maturity. Twelve mutants were selected, and evaluated for yield performance in field trials from M{sub 6} to M{sub 9} generations. All the mutants were shorter in plant height, and gave higher mean yield than the parent. Correlation coefficient analysis showed that the number of productive tillers, number of panicles per square meter and grain filling in the panicle were important characters which influenced yield. On the other hand, panicle length had negative influence on yield. Cv. `Supa India` and `Salama` were also irradiated with doses of 170, 210, 240 Gy gamma rays. Analysis of M{sub 2} populations of these cultivars indicated that mutagenesis created a lot of variation in plant height, maturity, spikelet fertility and panicle length. The induced variation shall be useful in selecting desired plant types. (author). 16 refs, 12 tabs.
Authors:
Kihupi, A [1] 
  1. Department of Crop Science and Production, Sokoine Univ. of Agriculture, Morogoro (Tanzania)
Publication Date:
Jul 01, 1997
Product Type:
Conference
Report Number:
IAEA-TECDOC-951; CONF-9510444-
Reference Number:
SCA: 553002; PA: AIX-28:054946; EDB-97:113819; SN: 97001834290
Resource Relation:
Conference: Final research coordination meeting on improvement of basic food crops ion Africa through plant breeding, including the use of induced mutations, Naples (Italy), 30 Oct 1995; Other Information: PBD: Jul 1997; Related Information: Is Part Of Improvement of basic food crops in Africa through plant breeding, including the use of induced mutations. Proceedings of a final research co-ordination meeting; PB: 145 p.
Subject:
55 BIOLOGY AND MEDICINE, BASIC STUDIES; RICE; PRODUCTIVITY; RADIATION INDUCED MUTANTS; PLANT BREEDING; PLANT GROWTH; PROGENY; RADIATION DOSES
OSTI ID:
511787
Research Organizations:
Joint FAO/IAEA Div. of Nuclear Techniques in Food and Agriculture, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1011-4289; Other: ON: DE97637601; TRN: XA9744551054946
Availability:
INIS; OSTI as DE97637601
Submitting Site:
INIS
Size:
pp. 45-54
Announcement Date:

Citation Formats

Kihupi, A. Plant type improvement of indigenous rice cultivars through induced mutations. IAEA: N. p., 1997. Web.
Kihupi, A. Plant type improvement of indigenous rice cultivars through induced mutations. IAEA.
Kihupi, A. 1997. "Plant type improvement of indigenous rice cultivars through induced mutations." IAEA.
@misc{etde_511787,
title = {Plant type improvement of indigenous rice cultivars through induced mutations}
author = {Kihupi, A}
abstractNote = {A high yielding, locally adapted cultivar `Afaa Mwanza 1/159` of rice (Oryza sativa L.) which is tall and late in maturity, was irradiated with gamma rays at doses of 170, 210 and 250 Gy to shorten plant height and time of maturity. Twelve mutants were selected, and evaluated for yield performance in field trials from M{sub 6} to M{sub 9} generations. All the mutants were shorter in plant height, and gave higher mean yield than the parent. Correlation coefficient analysis showed that the number of productive tillers, number of panicles per square meter and grain filling in the panicle were important characters which influenced yield. On the other hand, panicle length had negative influence on yield. Cv. `Supa India` and `Salama` were also irradiated with doses of 170, 210, 240 Gy gamma rays. Analysis of M{sub 2} populations of these cultivars indicated that mutagenesis created a lot of variation in plant height, maturity, spikelet fertility and panicle length. The induced variation shall be useful in selecting desired plant types. (author). 16 refs, 12 tabs.}
place = {IAEA}
year = {1997}
month = {Jul}
}