Comparative growth studies of crop species with special reference to harvest index as a criterion of the yielding ability of a genotype (Record no. 41650)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03066nam a22003377a 4500 |
| 001 - CONTROL NUMBER | |
| control field | G63779 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-TxCIM |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250411113406.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250411s1979||||at ||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloging agency | MX-TxCIM |
| 041 ## - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) | |
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) | Look under author name |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Bamakhramah, H.S. |
| 245 10 - TITLE STATEMENT | |
| Title | Comparative growth studies of crop species with special reference to harvest index as a criterion of the yielding ability of a genotype |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc. | Melbourne (Australia) : |
| Name of publisher, distributor, etc. | University of Melbourne, |
| Date of publication, distribution, etc. | 1979 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 130 pages |
| 340 ## - PHYSICAL MEDIUM | |
| Material base and configuration | Printed |
| 500 ## - GENERAL NOTE | |
| General note | Thesis (M. Sc.) |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | A large increase in yield during the history of crop improvement has been achieved as a consequence of selection, both deliberate and non-deliberate, by man for improved yield. Probably, without exception, present-day crop cultivars greatly outyield their ancestors. An analysis of the physiological basis of yield improvement indicates that it comes not so much from increased efficiency of the photosynthetic apparatus or plant size (kg dry matter per hectare) but through more efficient allocation of dry matter within the plant. Recent research has been directed towards investigating how the plant distributes photosynthate amongst different plant parts; that is, the partitioning of assimilates. Efficiency of distribution is summarized in the agricultural term “harvest index” which is defined as the weight of the economically valuable part of the plant (e.g. grain, tuber, fibre, etc.) expressed as a proportion of the total weight. There is good ground for thinking that harvest index is heritable, being made up of a number of components, some of which have high heritability. Therefore, it might be expected that harvest index could be bred and selected for by plant breeders and could be used as a criterion in predicting the relative performance of genotypes and in estimating their potential for producing high yields. It is not clear how consistent harvest index is. Does it vary much when small changes in environmental conditions cause absolute yield to vary? If so, its value for deliberate improvement is limited. There is a need for more investigation of the consistency of harvest index under different environments. In this study the effect of environmental factors (namely, plant density, nutrient and water status of the soil and plant growth characters) on the partitioning of assimilates, in particular on harvest index, are examined. Harvest indices of different species and cultivars within species are compared. An attempt is also made to relate change in harvest index to evolutionary development of wheat. |
| 546 ## - LANGUAGE NOTE | |
| Language note | English |
| 591 ## - CATALOGING NOTES | |
| Affiliation | 9704 |
| 595 ## - COLLECTION | |
| Collection | Thesis Collection |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Crop yield |
| Source of heading or term | AGROVOC |
| 9 (RLIN) | 1066 |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Plant growth |
| Source of heading or term | AGROVOC |
| 9 (RLIN) | 21209 |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | High-yielding varieties |
| Source of heading or term | AGROVOC |
| 9 (RLIN) | 1147 |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Plant production |
| 9 (RLIN) | 1212 |
| Source of heading or term | AGROVOC |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Selection |
| Source of heading or term | AGROVOC |
| 9 (RLIN) | 4749 |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| 9 (RLIN) | 1134 |
| Topical term or geographic name as entry element | Genotypes |
| Source of heading or term | AGROVOC |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Plant breeding |
| Source of heading or term | AGROVOC |
| 9 (RLIN) | 1203 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Thesis |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Date last seen | Total Checkouts | Full call number | Barcode | Copy number | Price effective from | Koha item type | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection code | Withdrawn status | Home library | Current library | Date acquired |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 02/10/2015 | Look under author name | 623868 | 1 | 02/10/2015 | Thesis | Not Lost | Dewey Decimal Classification | Thesis Collection | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Knowledge Center: John Woolston Library | 02/10/2015 |