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008			241212b |||||||| |||| 00| 0 eng d
022			_a0021-8596
040			_aMSU _bEnglish _cMSU _erda
050	0	0	_aS3 JOU
100	1		_aSankarapandian, R. _eauthor
245	1	0	_aEffect of morpho-physiological traits on grain yield of sorghum grown under stress at different growth stages, and stability analysis _ccreated by R. Sankarapandian, S. Audilakshmi, V. Sharma, K. Ganesamurthy, H. S. Talwar and J. V. Patil
264	1		_aCambridge: _bCambridge University Press, _c2013.
336			_2rdacontent _atext _btxt
337			_2rdamedia _aunmediated _bn
338			_2rdacarrier _avolume _bnc
440			_aJournal of agricultural science _vVolume 151, number 5,
520	3		_aRecent trends in climate change resulting in global warming and extreme dry spells during rainy seasons are having a negative impact on grain and fodder production in rain-fed crops in India. Understanding the mechanisms of drought tolerance at various growth stages will help in developing tolerant genotypes. Crosses were made between elite and drought-tolerant sorghums, and F2 and F3 progenies were evaluated for drought tolerance in multiple locations. Twenty-five F4/F5 derivatives along with drought-tolerant check plants (two high-yielding genotypes showing moderate drought tolerance: C43 (male parent of the commercial hybrid CSH 16, tolerant to drought) and CSV 17, (a pure line commercial cultivar released for drought-prone areas) were screened for drought tolerance under a factorial randomized block design with three replications during the rain-free months of April–June in 2007 and 2008 at Tamil Nadu Agricultural University, Kovilpatti, India. In each generation/year, four trials were conducted and water stress at different phases of crop growth, viz. vegetative, flowering and post-flowering (maturity), was imposed by withholding irrigation. Observations were recorded on grain and straw yields, plant height, number of roots, root length, leaf relative water content (LRWC), chlorophyll content and stomatal conductance under all treatments. The traits, grain yield, plant height, average root length and stomatal conductance showed significant mean sums of squares (SSs) for genotype × environment (G × E), suggesting that genotypes had significant differential response to the changing environments. Significant mean SSs due to G × E (linear) were obtained for straw yield, LRWC and chlorophyll content, indicating that the variability is partly genetic and partly influenced by environment. Grain yield was correlated with chlorophyll content (r = 0·43) at the vegetative stage, with number of roots (r = 0·49), LRWC (r = 0·51), chlorophyll content (r = 0·46) and stomatal conductance (r = −0·51) at the pre-flowering stage, and with LRWC (r = 0·50) and stomatal conductance (r = −0·40) at the post-flowering stage, under water stress. Partial least square (PLS) analysis showed that different traits were important for grain yield under water stress at different growth stages. Pyramiding the genes for the traits responsible for high grain yield under stress will help in developing stable genotypes at different stages of plant growth.
650			_aDrought tolerance _vSorghum _xGrowth stages
700	1		_aAudilakshmi, S. _eco-author
700	1		_aSharma, V. _eco-author
700	1		_aGanesamurthy, K.
700	1		_aTalwar, H. S.
700	1		_aPatil, J. V.
856			_uhttps://doi.org/10.1017/S002185961200072X
942			_2lcc _cJA
999			_c168825 _d168825