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Improvement of pigenonpea and cowpea for drought, disease and insect pest tolerance through induced mutations

Abstract

Pigeonpea and cowpea are widely grown in the semi-arid and arid regions of Kenya by small scale farmers. The average yields are usually low due to insect pests, diseases and long growth duration of the local land races. Little success has been achieved through conventional breeding methods for tolerance to insect pests and diseases despite the development of high yielding and early maturing lines. Therefore, mutation induction was initiated to widen the genetic variability in the improved lines. Seeds of three promising pigeonpea cultivars KAT 60/8, KAT 777 and KAT E31/4 and of cowpea KAT 419, K80 and M66 were subjected to three doses of gamma rays; 80, 120 and 150 Gy for pigeonpea and 160, 200 and 250 Gy for cowpea. In M{sub 1} generation, doses of 150 Gy and 250 Gy reduced emergence by about 50% and increased seedling deformities in both crops. In M{sub 2} generation of KAT 60/8, high yielding mutants with oval shaped seeds (T{sub 1} P{sub 58}) and branching (T{sub 3} P{sub 28}) were identified. Two progenies of KAT 777 (T{sub 1} P{sub 7} and T{sub 1} P{sub 11}) had small slender leaves. Selected plant progenies in M{sub 3}, M{sub 4} and M{sub 5}  More>>
Authors:
Omanga, P A [1] 
  1. National Dryland Farming Research Centre, Kenya Agricultural Research Inst., Machakos (Kenya)
Publication Date:
Jul 01, 1997
Product Type:
Conference
Report Number:
IAEA-TECDOC-951; CONF-9510444-
Reference Number:
SCA: 553002; PA: AIX-28:054954; EDB-97:113815; SN: 97001834298
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; PISUM; PLANT BREEDING; RADIATION INDUCED MUTANTS; DISEASE RESISTANCE; DROUGHT RESISTANCE; INSECTS; PEAS; PEST CONTROL; PROGENY; RADIATION DOSES
OSTI ID:
511795
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: XA9744559054954
Availability:
INIS; OSTI as DE97637601
Submitting Site:
INIS
Size:
pp. 103-107
Announcement Date:

Citation Formats

Omanga, P A. Improvement of pigenonpea and cowpea for drought, disease and insect pest tolerance through induced mutations. IAEA: N. p., 1997. Web.
Omanga, P A. Improvement of pigenonpea and cowpea for drought, disease and insect pest tolerance through induced mutations. IAEA.
Omanga, P A. 1997. "Improvement of pigenonpea and cowpea for drought, disease and insect pest tolerance through induced mutations." IAEA.
@misc{etde_511795,
title = {Improvement of pigenonpea and cowpea for drought, disease and insect pest tolerance through induced mutations}
author = {Omanga, P A}
abstractNote = {Pigeonpea and cowpea are widely grown in the semi-arid and arid regions of Kenya by small scale farmers. The average yields are usually low due to insect pests, diseases and long growth duration of the local land races. Little success has been achieved through conventional breeding methods for tolerance to insect pests and diseases despite the development of high yielding and early maturing lines. Therefore, mutation induction was initiated to widen the genetic variability in the improved lines. Seeds of three promising pigeonpea cultivars KAT 60/8, KAT 777 and KAT E31/4 and of cowpea KAT 419, K80 and M66 were subjected to three doses of gamma rays; 80, 120 and 150 Gy for pigeonpea and 160, 200 and 250 Gy for cowpea. In M{sub 1} generation, doses of 150 Gy and 250 Gy reduced emergence by about 50% and increased seedling deformities in both crops. In M{sub 2} generation of KAT 60/8, high yielding mutants with oval shaped seeds (T{sub 1} P{sub 58}) and branching (T{sub 3} P{sub 28}) were identified. Two progenies of KAT 777 (T{sub 1} P{sub 7} and T{sub 1} P{sub 11}) had small slender leaves. Selected plant progenies in M{sub 3}, M{sub 4} and M{sub 5} generation gave some promising high yielding variants. Although, the difference in days to flower and maturity of mutant progenies and untreated bulk were small, some mutant progenies of KAT 777 and KAT 60/8 showed tolerance to Fusarium wilt. None of the progenies of KAT E31/4 gave better score for Cercospora leaf-spot compared to the check. (author). 2 refs, 4 tabs.}
place = {IAEA}
year = {1997}
month = {Jul}
}