000 | 03817nab a22004697a 4500 | ||
---|---|---|---|
001 | G96092 | ||
003 | MX-TxCIM | ||
005 | 20230710210912.0 | ||
008 | 211020s2011 ne |||p|op||| 00| 0 eng d | ||
022 | 0 | _a0378-4290 | |
024 | 8 | _ahttps://doi.org/10.1016/j.fcr.2011.03.015 | |
040 | _aMX-TxCIM | ||
041 | _aeng | ||
090 | _aCIS-6634 | ||
100 | 1 |
_aZheng, T.C. _920750 |
|
245 | 1 | 0 | _aGenetic gains in grain yield, net photosynthesis and stomatal conductance achieved in Henan Province of China between 1981 and 2008 |
260 |
_aAmsterdam (Netherlands) : _bElsevier, _c2011. |
||
500 | _aPeer review | ||
500 | _aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0378-4290 | ||
520 | _aKnowledge of the changes in agronomic and photosynthetic traits associated with genetic gains in grain yield potential is essential for an improved understanding of yield-limiting factors and for determining future breeding strategies. The objectives of this study were to identify agronomic and photosynthetic traits associated with genetic gains in grain yield of facultative wheat (Triticum aestivum L.) between 1981 and 2008 in Henan Province, the most important wheat producing area in China. During the 2006–2007 and 2007–2008 crop seasons, a yield potential trial comprising 18 leading and new cultivars released between 1981 and 2008 was conducted at two locations, using a completely randomised block design of three replicates. Results showed that average annual genetic gain in grain yield was 0.60% or 51.30 kg ha−1 yr−1, and the significant genetic improvement in grain yield was directly attributed to increased thousand grain weight which also contributed to the significant increase in harvest index. The genetic gains in rates of net photosynthesis at 10, 20 and 30 days after anthesis were 1.10% (R2 = 0.46, P < 0.01), 0.68% (R2 = 0.31, P < 0.05) and 6.77% (R2 = 0.34, P < 0.05), respectively. The rates of net photosynthesis at 10 (r = 0.58, P < 0.05), 20 (r = 0.59, P < 0.05) and 30 (r = 0.65, P < 0.01) days after anthesis were closely and positively correlated with grain yield. A slight decrease in leaf temperature and an increase in stomatal conductance after anthesis were also observed. Grain yield was closely and positively associated with stomatal conductance (r = 0.69, P < 0.01) and transpiration rate (r = 0.63, P < 0.01) at 30 days after anthesis. Therefore, improvement of those traits was the likely basis of increasing grain yield in Henan Province between 1981 and 2008. The genetic improvement in yield was primarily attributed to the utilization of two elite parents Yumai 2 and Zhou 8425B. The future challenge of wheat breeding in this region is to maintain the genetic gain in grain yield and to improve grain quality, without increasing inputs for the wheat–maize double cropping system. | ||
536 | _aGlobal Wheat Program | ||
546 | _aText in English | ||
591 | _aElsevier | ||
594 | _aINT2411 | ||
595 | _aCSC | ||
650 | 7 |
_aTriticum aestivum _2AGROVOC _91296 |
|
650 | 7 |
_aGenetic improvement _2AGROVOC _92232 |
|
650 | 7 |
_aYield potential _2AGROVOC _930986 |
|
650 | 7 |
_aYield components _2AGROVOC _91312 |
|
700 | 0 |
_aZhang Xiao-Ke _916893 |
|
700 | 0 |
_aGuihong Yin _93036 |
|
700 | 0 |
_aLanfeng Wang _924186 |
|
700 | 0 |
_aYunliang Han _924187 |
|
700 | 1 |
_aChen, L. _924188 |
|
700 | 1 |
_aHuang, F. _924189 |
|
700 | 1 |
_aTang Jian-Wei _916894 |
|
700 | 0 |
_aXianchun Xia _9377 |
|
700 | 1 |
_aHe Zhonghu _gGlobal Wheat Program _8INT2411 _9838 |
|
773 | 0 |
_tField Crops Research _gv. 122, no. 3, p. 225-233 _wG444314 _dAmsterdam (Netherlands) : Elsevier, 2011. _x0378-4290 |
|
856 | 4 |
_uhttps://hdl.handle.net/20.500.12665/1415 _yAccess only for CIMMYT Staff |
|
942 |
_cJA _2ddc _n0 |
||
999 |
_c28898 _d28898 |