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Pollen Selection for Heat Tolerance in Cotton
Author(s) -
RodriguezGaray Benjamin,
Barrow Jerry R.
Publication year - 1988
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1988.0011183x002800050030x
Subject(s) - pollen , backcrossing , biology , cultivar , heat stress , gossypium barbadense , selection (genetic algorithm) , pollen source , horticulture , botany , agronomy , pollination , gossypium hirsutum , gene , genetics , pollinator , zoology , artificial intelligence , computer science
Pollen from cotton ( Gossypium hirsutum L.) cultivars, which demonstrate heat tolerance in the field, generally express higher fertility after heat treatment than pollen from heat sensitive cultivars. The objective of this study was to determine, if pollen could be heat treated to eliminate all but those grains with genetic heat tolerance. Genes for heat tolerance could then be selected in the pollen and effectively transferred by the backcross method. A highly heat tolerant breeding line, 7456, of G. barbadense L. was used as the donor parent and ‘Paymaster 404’, a heat sensitive cultivar, as the recurrent parent and all crosses were made with pollen treated 15 h at 35 °C to generate F 1 , F 2 and first and second backcross populations. Increased heat tolerance, as measured by fertile pollen after heat treatment, was observed in plants from all populations. Similar heat tolerance patterns were observed in the parents, F 1 , F 2 , and first backcross populations, when plants were grown to maturity at high temperatures in a growth chamber. Pollen selection through heat treatment allows screening for large numbers of genetic combinations in pollen and may be a valuable method of breeding for heat tolerance and possibly other stress tolerance characteristics.