From stress-tolerant populations to hybrids: (Record no. 3720)

000 -LEADER
fixed length control field 03810nam a22004457a 4500
001 - CONTROL NUMBER
control field 65823
003 - CONTROL NUMBER IDENTIFIER
control field MX-TxCIM
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20190401213004.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 121211s ||||f| 0 p|p||0|| |
020 ## - INTERNATIONAL STANDARD BOOK NUMBER
International Standard Book Number 968-6923-93-4
040 ## - CATALOGING SOURCE
Original cataloging agency MX-TxCIM
072 #0 - SUBJECT CATEGORY CODE
Subject category code F30
072 #0 - SUBJECT CATEGORY CODE
Subject category code H50
082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER
Classification number 633.153
Item number EDM
100 1# - MAIN ENTRY--PERSONAL NAME
Personal name Edmeades, G.O.
Affiliation Developing Drought- and Low N-Tolerant Maize. Proceedings of a Symposium; El Batan, Tex. (Mexico); 25- 29 Mar 1996
110 2# - MAIN ENTRY--CORPORATE NAME
Corporate name or jurisdiction name as entry element Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
245 00 - TITLE STATEMENT
Title From stress-tolerant populations to hybrids:
Remainder of title The role of source germplasm
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Place of publication, distribution, etc. Mexico, DF (Mexico)
Name of publisher, distributor, etc. CIMMYT :
Date of publication, distribution, etc. 1997
340 ## - PHYSICAL MEDIUM
Material base and configuration Printed
520 ## - SUMMARY, ETC.
Summary, etc. The performance of populations experiencing water deficits at flowering and during grain filling or low N stress can be improved by recurrent selection, and the challenge now is to determine if those benefits carry over to hybrids which are derived from these populations. To test whether the frequency of stress-tolerant hybrids was increased by selecting inbred lines from stress-tolerant source populations versus conventional populations, we developed random inbred lines from four pairs of populations. Each member of the pair traced to a common population but differed in history of selection for stress tolerance. Drought tolerance was examined by comparing: TS6 C2 with Tuxpeño Sequia C0 and with Pop. 21 MRRS C2; La Posta Sequia C3 with Pop. 43 Cg, and Pool 26 Sequia C3 with Pool 26 C23. The effect of selection for low N tolerance was studied by comparing Across 8328 BN Cs with Across 8928. Each pair was sown in neighboring plots, managed identically, and selected in the same manner. For each population approximately 100 S2 families were selected. Inbred lines were each crossed to two conventionally selected inbred line testers, and topcrosses (TCs) were grown in 2-4 environments varying in the level of target stress. Under drought stress TCs derived from drought tolerant populations significantly outyielded those from conventional populations by an average of 22% (310 kg ha-1) at 1.56 t ha-1, nonsignificantly by 1% (43 kg ha-1)at 5.29 t ha-1, and yielded 2% less than the conventional TCs (-130 kg ha-1) under well-watered conditions (6.08 t ha-1). The probability of obtaining a hybrid that yielded 40% greater than the trial mean under severe stress was 4-fold greater when lines were extracted from a drought-tolerant source population than from its conventional counterpart. Topcrosses from Across 8328BN outyielded conventionally-derived lines under low N by a significant 11.1% (200 kg ha-1) at 1.90 t ha-1, and by a similar amount under high N (3%, or 200 kg ha-1) at 6.0 t ha-1. We conclude that drought- or N-tolerant elite source populations provide a greater proportion of drought- or N tolerant inbred lines and hybrids. This suggests that investment by CIMMYT and national programs in increasing the stress-tolerance of source and F2 populations formed during line recycling is fully justified.
536 ## - FUNDING INFORMATION NOTE
Text of note Research and Partnership Program
546 ## - LANGUAGE NOTE
Language note English
591 ## - CATALOGING NOTES
Affiliation 9802|AGRIS 9702|anterior|R97-98PROCE|FINAL9798
594 ## - STAFFID
StaffID INT1888
595 ## - COLLECTION
Collection CIMMYT Publications Collection
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Drought resistance
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
9 (RLIN) 1081
Topical term or geographic name as entry element Drought stress
Miscellaneous information AGROVOC
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Germplasm
9 (RLIN) 1136
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Recurrent selection
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Water deprivation
653 0# - INDEX TERM--UNCONTROLLED
Uncontrolled term CIMMYT
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
9 (RLIN) 1314
Topical term or geographic name as entry element Zea mays
Miscellaneous information AGROVOC
650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM
9 (RLIN) 1151
Topical term or geographic name as entry element Hybrids
Miscellaneous information AGROVOC
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Cortés C., M.,
Relator term coaut.
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Edmeades, G.O.|Banziger, M.|Mickelson, H.R.|Peña-Valdivia, C.B.
Relator term eds.
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Ortega C., A.,
Relator term coaut.
700 1# - ADDED ENTRY--PERSONAL NAME
9 (RLIN) 834
Personal name Banziger, M.
Miscellaneous information Research & Partnership Program
Field link and sequence number INT1888
Relator term coaut.
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type Conference proceedings
Holdings
Withdrawn status Lost status Damaged status Not for loan Collection code Permanent Location Current Location Date acquired Full call number Barcode Date last seen Copy number Price effective from Koha item type
  Not Lost     CIMMYT Publications Collection CIMMYT Knowledge Center: John Woolston Library CIMMYT Knowledge Center: John Woolston Library 2015-02-10 633.153 EDM 1Y624179 2015-02-10 1 2015-02-10 Conference proceedings
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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Lunes –Viernes 9:00 am. 17:00 pm. Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org