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Development of a selection tool for seed shape and QTL analysis of seed shape with other morphological traits for selective breeding in chickpea (Cicer arietinum L.)
Citation
Hossain, S and Ford, R and McNeil, DL and Pittock, C and Pannozzo, JF, Development of a selection tool for seed shape and QTL analysis of seed shape with other morphological traits for selective breeding in chickpea (Cicer arietinum L.) , Australian Journal of Crop Science, 4, (4) pp. 278-288. ISSN 1835-2693 (2010) [Refereed Article]
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Copyright Statement
Copyright 2010 Southern Cross Publisher
Official URL: http://www.cropj.com/june2010.html
Abstract
Chickpea (Cicer arietinum L.) is an annual diploid (2n= 2x= 16) grain legume, grown worldwide for human consumption. Selection
for variation in the physical seed characters of chickpea will enable future strategic breeding of varieties with the potential to attract
premium prices in overseas markets. Seed shape is therefore a major current breeding objective, for which an understanding of the
genetics of inheritance is required. For this, two recombinant inbred line (RIL) populations derived from intraspecific crosses of a
kabuli-type (S95362; light cream colour) crossed to two desi-types (Howzat and ICC3996; medium tan and dark tan colour,
respectively) were studied. In order to discretely characterize seed shape, a new Roundness Index (RI) tool was developed, calculated
from the ratio of two seed size indices (SSI). The genetic parameters estimated were genotypic and total phenotypic variance for RI,
genotype vs environment interaction and broad sense heritability. The low genotype x environment interaction (<9% of total
variation for both populations) and high magnitude of heritability suggested the environmental stability of the seed shape trait.
Segregation ratios for different seed shape among the RIL populations indicated control of seed shape under two genes.
Subsequently, one putative quantitative trait loci (QTL) was identified on linkage group LG 2 between markers TA110-TA27 and
accounted for 9% of the phenotypic variance. One QTL for stem colour and flowering time also detected on LG 2 between markers
TR58-TR19 (explained 16% phenotypic variance) and LG 3 between markers TS19-TR56 (explained 23% phenotypic variance)
respectively.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Chickpea, seed shape classification, seed size index, roundness index, QTL analysis, markers. |
| Research Division: | Agricultural, Veterinary and Food Sciences |
| Research Group: | Crop and pasture production |
| Research Field: | Crop and pasture improvement (incl. selection and breeding) |
| Objective Division: | Plant Production and Plant Primary Products |
| Objective Group: | Grains and seeds |
| Objective Field: | Grain legumes |
| UTAS Author: | McNeil, DL (Professor David McNeil) |
| ID Code: | 66142 |
| Year Published: | 2010 |
| Web of Science® Times Cited: | 16 |
| Deposited By: | Agricultural Science |
| Deposited On: | 2011-01-05 |
| Last Modified: | 2012-08-01 |
| Downloads: | 3 View Download Statistics |
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